Bearings are components that are paramount to the operations of countless assemblies, serving to constrain motion while also minimizing friction between moving parts. Bearings can come in numerous shapes and forms, thrust bearings being a common type that are implemented in assemblies to absorb axial loads. As bearings that are typically found within automobile gearboxes, radio antenna masts, and other various automotive, marine, and aerospace applications, having a general understanding of thrust bearings and their use can be beneficial.

As stated before, thrust bearings are best fit for taking on the axial loads of a particular assembly. Axial loads are those that are transmitted linearly along a shaft, stemming from various sources such as the forward thrust of boats or the rotation of a propeller powered by a piston aircraft engine. Rotating between parts in motion, thrust bearings may come in a number of forms to facilitate diverse operations.

Thrust ball bearings are those that take advantage of bearing balls that are placed within a ring, accommodating the operations of low thrust applications that exhibit low axial loads. Cylindrical thrust roller bearings, meanwhile, feature cylindrical rollers that are specifically oriented with their axes facing the axis of the bearing. While cost-efficient and featuring high load carrying capacities, such thrust bearings can face wear due to their varying radial speeds and friction. Tapered roller thrust bearings are another common roller thrust bearing, featuring small tapered rollers instead of cylindrical rollers. These tapered rollers are oriented with their axes covering on the axis of the bearing, and the design of the component directly affects how smoothly the rollers are able to roll. Tapered roller thrust bearings are the most common variation for automobiles, capable of taking on axial and radial loads.

Spherical roller thrust bearings feature asymmetrical rollers that are shaped like spheres, placed within a spherical raceway. With their specific design, spherical roller thrust bearings are suited for taking on both radial and axial loads, all while aiding the misalignment of shafts. Generally, spherical roller thrust bearings are paired with radial spherical roller bearings. With the use of fluid bearings, axial thrust can be taken on with the assistance of a pressurized liquid layer, ensuring that drag is mitigated during operations. The final major type of thrust bearing is the magnetic bearing, that of which takes on axial thrust through the use of a magnetic field. Generally, these bearings are used for high speed operations and provide low drag.

As certain bearings differ in their ability to take on certain loads or operational conditions, it is crucial that purchasing decisions are made with ample consideration for the application in question. To ensure proper functionality, reliability, and a long service life for a particular bearing, it should be of the correct type, material, size, and shape for the system or assembly that it will be installed in. After factoring in all operational requirements and bearing characteristics as necessary, Aerospace Unlimited can help you secure all the radial bearing, roller bearing, and thrust bearing components you need with unmatched prices and service.


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In order for aircraft to maintain heavier-than-air flight over significant distances, they require some form of power generation for the means of producing thrust and propulsion. For many early aircraft and those that are lightweight or general aviation types, the piston engine serves as the most common solution for maintaining flight. Piston engines can come in a variety of forms, some common types being the inline engine, radial engine, horizontally opposed engine, and V-type engine. While each of these types may differ in their construction and operation to some degree, all function through a common working principle.

Across all piston engine types, one or more pistons are placed within cylinders and situated in various configurations. The cylinder is the area in which gas is introduced with the fuel injection system, and it is mixed together with intake air through the movements of the piston before being ignited. The ignition system of a typical piston engine will commonly use a magneto, and such devices are used to create a spark powerful enough to reach the cylinder and ignite mixtures. The resulting combustive force and gases from ignition will drive the piston upwards, this movement being harnessed by a connecting rod and crankshaft for the means of converting linear motion into a rotational motion. The rotational motion created through combustion is important driving the propellers of the aircraft for flight. After the piston has driven the crankshaft assembly, it can then force the exhaust gases out of the cylinder before repeating the cycle again.

Depending on the type of aircraft and its piston engine, the general operation of pistons may slightly vary. Generally, each type will differ on the number of cylinders that they contain, and various orientations may feature a circular design with a central crankshaft, multiple cylinders situated within a line, or other such configurations. Based on the construction of the cylinders and their number, the timing of piston firing may also differ by model so that smooth operations are achieved without any delay in combustion. While the amount of strokes and cylinders for engine operation may vary by engine type, the general rule of thumb is that more cylinders can further spread power pulses for smoother functionality.

Piston engines are often compared to gas turbine engines, and their operational characteristics and capabilities are set apart from one another. While the piston engine creates power through the conversion of linear motion and pressure, gas turbine engines utilize the pressure of ignited gases to drive a turbine for thrust generation. While the gas turbine engine may be capable of achieving higher amounts of power and can be very reliable, such engine types are not suitable for many smaller aircraft due to their size and weight. As a result, a piston engine that drives a propeller assembly ensures optimal flight characteristics for such aircraft.

As piston engines operate with numerous moving assemblies and high amounts of heat, it is important that they are regularly inspected and maintained to ensure their continued operability and efficiency. To prevent heat from damaging components, engines should be well lubricated with cooling oil and the cooling system should be able to efficiently mitigate extreme temperatures. Furthermore, the engine should be operated regularly as well, as a sitting engine can be susceptible to rust and other forms of corrosion over time.


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The exhaust section of a gas turbine engine is paramount for heat dissipation and performance, ensuring that spent gases are optimally expelled from the engine after combustion. While varying engines may contain different components and complex assemblies, the common function of all exhaust parts is to direct spent gases out of the engine in such a way that an efficient exit velocity is reached without causing turbulence. 

The main sections of the gas turbine engine include the exhaust cone, tailpipe, and exhaust nozzle. The exhaust cone is the section of the aircraft engine that follows the turbine assembly, and it gathers the expanding gases that pass through the turbine blades so that they may be directed into a solid flow. By converting the stream of gas, the exhaust cone can cut down the velocity of the gas while increasing its pressure. For the design of the exhaust cone, the section contains an outer shell, inner cone, multiple radial hollow struts, and tie rods for support.

The outer shell of the assembly is tasked with collecting exhaust gases, and it often comes in the form of a stainless steel assembly which is connected to the turbine case rear flanges. If there is a need for temperature thermocouples within the assembly, the duct may be designed with thermocouple bosses. The struts are also attached to the outer duct, and they serve as supports for the inner cone which sits in the middle of the exhaust duct. Struts are also useful for straightening the flow of exhaust, ensuring that they exit at a proper angle for beneficial operations. The inner cone is placed near the rear face of the turbine disk, and it serves to prevent exiting exhaust gases from causing turbulence. The inner cone may also feature a small hole at the exit tip, and this allows for air circulation to cool the turbine wheel.

The tailpipe is the next major section of the aircraft gas turbine engine, and they are often designed with semiflexible characteristics. For certain tailpipe constructions, a bellows arrangement may be implemented for the means of moving the tailpipe during thermal expansion, maintenance, and installation. With such capabilities of movement, the tailpipe is less at risk of warping under stress. As the high temperatures of combustion can result in heat radiating from the exhaust cone and tailpipe, engineers often implement insulation for the protection of airframe components. While there are numerous solutions that may serve for thermal protection, shrouds and insulation blankets are the most common as they can protect assemblies and increase performance.

The exhaust nozzle is the final section of the engine, and it may be a converging design for subsonic gas velocities or a converging-diverging design for the means of supersonic gas velocities. The nozzle opening may also have a fixed or variable area, the fixed area being fairly simplistic due to its lack of moving parts. It is important that fixed area nozzles are optimally designed so that the engine does not choke during operations and can achieve optimal thrust. When an augmenter or afterburner is implemented in the engine, the exhaust nozzle will come in the form of the variable area type as it will need to extend its open area to accommodate the increased mass of flow. If the augementer or afterburner is shut-off, the exhaust nozzle can adjust to a smaller opening.


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A pressure sensor is a device capable of converting pressure into an electrical signal. They have a wide range of uses in many different applications, so the type of pressure sensor you are using for a given task matters. For example, a pressure sensor that does a good job of measuring oil and gas may not be ideal for measuring hydraulic fluids. Prior to purchasing a pressure sensor, it is important to consider all types to determine which one will best suit your needs.

The first type of pressure sensor is the chemical vapor deposition pressure sensor. Chemical Vapor Deposition, or CVD, is a process used to produce highly stable strain gauge pressure transducers. This process offers a reliable option where many other low-cost pressure sensors would fail. Within each of these transducers is an ASIC chip which offers high levels of linearity correction. CVD pressure sensors are ideal for applications including off-highway, HVAC, and semiconductor processing. Pressure transducers of this type also have a thicker diaphragm, allowing them to handle intense pulsating pressures.

A second type of pressure sensor is the sputtered thin film pressure sensor. Of all types, these are the most dependable. They are known for their long-term durability and high accuracy, even in harsh conditions. Depending on the application, sensors of this type are available in ranges from 0-100 to 0-30,000 PSI. Sputtered thin film pressure sensors offer unrivaled performance in volatile environmental scenarios including high temperatures, intense shock & vibration, and massive pressure spikes. They are fit for applications such as off-highway, fire protection, refrigeration, and alternative fuel.

The next type of pressure sensor, variable capacitance pressure sensors, are ideal when you need a dependable means of measuring low pressure. These are available in ranges from 0-2 PSI to 0-15 PSI, allowing them to accommodate many applications. Their unique characteristics include a sturdy physical configuration, stainless steel & ceramic wetted parts, and variable capacitor technology. They can also be used for high pressure applications such as industrial engines, hydraulic systems, process control, and natural gas pipelines.

The fourth type of pressure sensors are ideal for applications with high shock and vibration. These are solid-state pressure sensors. They are switches featuring a hermetic stainless steel diaphragm. These sensors provide high accuracy measurements where tight system controls are needed, and are more advantageous than electromechanical pressure switches when actuations exceed fifty cycles per minute. They are used in the off-highway, medical, gas, compressor, and other industrial applications.

The final type of pressure sensors are micro machined silicon (MMS) strain gauge sensors. These offer a cost effective solution for low pressures in absolute, compound, and gauge references. MMS pressure sensors feature stainless steel parts in addition to an all-welded construction that is resistant to harsh environments and chemicals. They are most commonly used in applications such as air conditioning refrigerant recovery, gas analysis instrumentation, and medical sterilizers.


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A valve is a device used to regulate, control, or direct the flow of fluid within a system or process by opening, closing, or partially obstructing it. In piping, many different types of valves are used in varying applications. Valves have an important role within piping systems and often account for up to 30% of the overall piping system costs. However, choosing the wrong type of valve for your system can increase costs markedly, making valve selection as essential to the economics of your system as it is to the operation. 

Gate Valve

The first and most common type of valve is the gate valve. These are linear motion valves used to start or stop fluid flow. During operation, the gate valve is either fully open or fully closed. They are used in nearly all fluid services including air, fuel gas, feedwater, steam, lubricant oil, hydrocarbon, and more.

Globe Valve

The globe valve is a type of valve used to stop, start, or regulate fluid flow. These are frequently used in systems where flow control is required but leak prevention is also critical. They provide better shut off than gate valves, but are also more expensive.

Check Valve

Check valves are used to prevent backflow of fluid in a piping system. The pressure of the fluid passing through a pipe opens the valve, while any reverse flow closes the valve.

Plug Valves

A plug valve is a quarter-turn rotary motion valve that utilizes a tapered or cylindrical plug to stop and start fluid flow. They are used as on-off stop valves and are capable of providing bubble-tight shut off. As such, they can be used in vacuum and other high-pressure and high-temperature applications.

Ball Valve

Ball valves are another type of quarter-turn rotary motion valve, but these use a ball-shaped disk to control the flow. Most ball valves are of the quick-acting type, which require a 90° turn to operate the valve. Ball valves operate similarly to gate valves, but are smaller and lighter.

Butterfly Valve

A butterfly valve is a quarter-turn rotary motion valve that can stop, start, or regulate flow. This valve features a short, circular body and a compact lightweight design, making it ideal for large valve applications due to the fact it takes up very little space.

Needle Valve

Needle valves have a similar design to that of globe valves, but feature a needle-like disk. They are designed to provide accurate flow control within piping systems with small diameters. Their name is derived from their pointed conical disc and corresponding seat.

Pinch Valves

Also known as clamp valves, pinch valves are linear motion valves used to start, regulate, and stop fluid flow. They utilize a rubber tube known as a pinch tube, and a pinch mechanism that regulates flow. Pinch valves are frequently used to handle liquids with significant amounts of suspended solids or in systems that pneumatically convey solid materials.

Pressure Relief Valves

These valves, also known as pressure safety valves, are used to protect equipment or systems from overpressure events or vacuums. They are designed to release pressure at a predetermined setting to prevent these from occurring.


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While computer hardware was often expensive and fairly unobtainable for the standard consumer during the technology’s infancy, prices have since seen a steady drop leading into the present. Now, consumers have much easier access and ability to create more complex and powerful systems with common components available on the market. With a number of consumer motherboards now offering more than one slot for CPU attachment, shared-memory processors can be used to achieve higher system performance for a number of applications.

Shared-memory processors are a type of system that contains multiple processors that may carry out their operations together. Through a shared interconnection network, the processors can utilize the same pool of memory and communicate with one another to carry out various procedures. As such, computers with shared-memory processors can exhibit a significant difference in their computation power as compared to standard work stations with only one processor. As these assemblies are typically geared more towards demanding applications and processes that may require large amounts of program execution, many casual users may not find much use in running a shared-memory processor set-up.

In the case of an internet, database, or network server, however, having the most processors possible is paramount to smooth operations and ensuring that the servers are able to accommodate periods of high usage and user loads. Additionally, shared-memory processors can also serve to streamline certain applications, as a computer system can utilize large amounts of power to conduct a single job rather than computing a high number of small jobs at the same time. When connecting processors together, each processor is joined from their independent data caches to a shared memory pool through a single interconnection network.

Known as symmetric multiprocessing hardware, such components allow for the assembly and pairing of multiple processors so that each CPU has equal control over memory and peripherals. Across most symmetric multiprocessing hardware assemblies, buses and crossbars serve as the primary method for interconnection. In regard to computer hardware, a bus is a component that allows for data to be transferred, and they are commonly seen on many motherboards for the connection of memory, CPUs, and more. A crossbar, on the other hand, is a component containing a series of switches that may be used to conduct information processing applications. Out of the two symmetric multiprocessing hardware pieces, the bus serves as the most convenient and common approach for establishing a shared-memory multiprocessor assembly. With the bus, connections for parts, protocols, and hardware are all provided to facilitate operations with ease. As buses are limited in their ability to handle high amounts of data traffic, it is important that loads do not exceed the performance standards of the bus as to avoid bottlenecking.

With the use of a crossbar, bottlenecking is avoided as multiple paths may operate simultaneously on a grid-like system. As an example, a 4x5 crossbar could allow for up to four active data transfers to be conducted at the same time. By having a higher number of active paths as compared to a singular shared bus, more performance can be achieved. While these advantages are clearly desirable, crossbar components typically range much higher in price, and their cost only increases as the load raises. Due to this, crossbars are mostly reserved for the most high-end applications.


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Ice can quickly accumulate, as you can usually tell just by looking or using your car on a very cold day. In cold climates, the ice can stick to your windows, blocking your windows. Not only that, but they can also make certain mechanisms stuck (such as a door or a gear) and result in your car not functioning at all, leaving you stranded where you are. These same issues can also affect an aircraft. As an aircraft needs to be functioning at full capacity in order to safely transport its passengers across the skies, the need to apply an anti-icing solution is even more detrimental. The process of using an anti-icing system is somewhat akin to someone applying a deicing solution to the windows of a vehicle before driving. In principle or idea, they are the same, but as you go through the process, you start to notice the differences. In this article, we will break down the process of using an anti-icing system, and also discuss why using these tools is so important.

Plane deicing is a strategy that consists of warming and applying deicing fluid onto the plane windows and wings. The significance of doing this is pivotal because this method ensures the eventual melting of snow that has been cemented onto the plane and, if not removed, could bargain the security of its next flight. The basic idea behind an anti-icing system is to tackle the cause that is making the outer atmosphere conditions to result in ice that can damage your vessel. You can take steps to prevent this by simply hangaring your plane. Hangaring the plane can shield it from ice and precipitation. Before leaving the plane in the safe space, you would need to ensure that there are no traces of water left on its surface, as these surfaces could be at risk of accumulating ice even inside the capacity. That is why it is ideal to clear any traces of water before you store the plane. Various habits by which you can shield ice from forming is by putting wing canvases or covers onto the plane. While it may not be 100% secure against ice, this procedure, notwithstanding the hangaring and water ejection philosophy, can spare time and costs.

There are also some parts and components of the aviation anti icing process and equipment that are important to have for deicing a plane. These constitute stream control valve, deicing boots, heat spread, and pitot tube. The stream valve is significant because it  utilizes a solenoid valve that engages air from the direct to stream into the gadget system. The valve opens once the device is enabled by the de-icing switch. This enables the contraption to work and warm the ice off from the vessel’s edges. Other tools that you can use include deicing boots. They are stretchy rubbery parts that are placed onto the corners of the fuselage, vertical stabilizer and the wing. They work by breaking down any ice accumulating at any point on the plane. Deicing boots are bulky pieces of rubber that are fastened onto the leading edges of an aircraft, typically the vertical stabilizer and the wing. They work by inflating any time there is an accumulation of ice buildup.

Once they’re inflated, snow or ice begin to crack on the surface. Eventually it flies off entirely, leaving no residue of snow. A heat blanket can also be used to cover the surface of an aircraft. The blanket works by trapping heat onto the surface and thus preventing any snow or ice from accumulating. Lastly, the pitot tube is significant because the freezing of these tubes can cause your airspeed indicator to fail. The airspeed indicator receives data on ram pressure but if the pitot tube is frozen over, that can alter the numbers. You may be flying slower than the airspeed indicator perceives. In this case, it is the pilot’s responsibility to descend to altitudes that are free of icing conditions and land, after which aircraft personnel can focus on deicing the pitot tube.

For more information on applying anti icing systems and solutions, contact the team at Aerospace Unlimited. We are the premier supplier of aviation, military, and defense parts. Not only do we provide anti-icing systems in airplanes, but we also stock pneumatic systems and systems for wing leading edge. Get in touch with us today!


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As we continue to move through these unprecedented times during the COVID-19 pandemic, more United States manufacturers are stepping up to aid in the supply shortage of ventilators and masks that are desperately needed by medical professionals and other affected sectors. Leading into June, car manufacturer Ford has joined companies such as 3M and General Electric to aid the medical community in this initiative.

Currently, Ford is not the only carmaker to contribute to the pandemic efforts, as similar decisions have also recently been made by companies such as Tesla and General Motors. Medical equipment such as medical masks and ventilators are a crucial need to treat an increasing number of symptomatic carriers, and shortages have proven to be a major issue currently. With the help of Ford, 3M’s output of powered air-purifying respirator (PAPR) masks is to be expanded. With an increase in production, state governments and other sectors may see more supply of needed medical equipment.

Together with 3M, Ford hopes to increase the manufacturing and supply of PAPR masks as quickly as possible, and they seek to utilize established technologies and products from their respective companies to aid in the effort. Ford also claims to be working alongside the health care division of GE in order to create a more simplistic ventilator. Without furthering information, Ford claimed that ventilators could be produced at both Ford and GE locations concurrently. As droplets from a person’s coughing or sneezing may lead to infection with the novel coronavirus, Ford also seeks to begin testing and production of new face shields that may further protect the medical professionals who are in close proximity with affected patients and individuals.

Other car manufacturers, such as General Motors and Tesla, have also been making strides in the production and supply effort with their respective initiatives. Recently, GM announced that they are partnering with Ventec Life Systems, a manufacturer of ventilators, to increase their logistics, manufacturing, and issues to improve output. Tesla has also been aiding in supply, providing ventilators to the state of California in March. For the University of Washington’s Medical Center, Tesla sent around 50,000 3M produced N95 surgical masks.

While companies such as Ford, General Motors, and Tesla have recently joined the fight against the pandemic, they are not alone in their efforts. Through the past months and moving into the future, we are seeing a great increase in United States companies working to fortify the strained medical infrastructure and medical care system. From boosting the supply chain for sourcing supplies and hastening production of highly needed medical materials, many American companies are spearheading manufacturing initiatives to combat COVID-19. As we continue to protect people and various sectors from the devastating effect of the virus, we may see even more companies step in to provide support.

Ensuring that you have the medical equipment that you need for protecting yourself, employees, and others is very important during these unprecedented times. When you are ready to begin sourcing medical equipment and related medical supplies that you need for your operations, Aerospace Unlimited has you covered with everything you are searching for. Aerospace Unlimited is owned and operated by ASAP Semiconductor, and we can help you find the aviation, NSN, and electronic parts that you are searching for, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we're always available and ready to help you find all the parts and equipment you need, 24/7x365. ASAP Semiconductor is an FAA AC 00-56B accredited and ISO 9001:2015 certified enterprise. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at +1-412-212-0606.


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Within the realm of aviation, landing gear proves to be one of the most important systems of the entire aircraft. Through the many aircraft landing gear components working together, an aircraft is able to touch ground and come to a stop safely and efficiently, avoiding damages. This is due to their specifically engineered designs that are in place to meet various requirements of weight, size, performance, and beyond as per FAA regulations. In this blog, we will discuss the aircraft landing gear system and how it helps bring an aircraft safely to a stop after flight.

Aircraft landing gear components work together to aid the aircraft during taxiing, landing, and take-off operations. Due to various needs and requirements surrounding these operations, landing gear is more often than not the first consideration and designed component of an aircraft. Designing and manufacturing landing gear can be a lengthy process due to having to uphold various required airworthiness regulations and to best serve the aircraft they are intended for. Depending on the type of aircraft and its application, different designs and equipment may be utilized as well.

To achieve a successful landing, each of the aircraft landing gear components have their own functionality and purpose. Piston landing gear, such as airplane wheels, are often fitted with shock absorbers to take the impact forces of landing off of the fuselage, and wheels also allow for taxiing around a runway. Disc brake and other brake types on the wheels have the important function of slowing down the aircraft speed until it can safely stop or taxi. Airplane wheels may also be installed in various numbers and arrangements, the most common being the taildragger and tricycle undercarriage. Often, landing gear may have the ability to be retractable and can be deployed and/or retracted into the fuselage while in flight with the aid of hydraulic systems. With retractable landing gear, aircraft can reduce drag that would be caused by the wheels and other systems.

Future plans for developing landing gear technologies include using high strength materials, damping systems, and electronic actuation. With high strength materials, fatigue and corrosion can be reduced for longer equipment lifespan. Damping systems are important to reduce fatigue and wear as well, as these electronic systems are slowly proving to be a very viable alternative for the replacement of hydraulic actuation systems. This is due to the fact that electric actuation systems are beginning to compete in weight, and do not have the problem of flammability and leaking that hydraulic systems have. Beyond these examples, there are many other goals of the aviation community to bring improvements to landing gear design and functionality.

When designing or maintaining your aircraft landing gear system, know that Aerospace Unlimited has you covered with our expansive inventory of over six billion parts. We understand that the parts procurement process can seem difficult, so we work to make it as simple as possible for you. Our expert staff are on hand to aid our customers with any questions that they may have during the purchasing process, and we can provide quick lead-times on hard to find and obsolete components.

Aerospace Unlimited is owned and operated by ASAP Semiconductor, and we can help you find arm assembly torque parts and other aviation components you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we're always available and ready to help you find all the parts and equipment you need, 24/7x365. Our dedication to quality and our customers is why we are proud to be an FAA AC 00-56B accredited and ISO 9001:2015 certified enterprise. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at +1-412-212-0606.


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PMA stands for Parts Manufacturer Approval. This approval is what allows for manufacturers to produce and sell articles for installation on type certification products. The approval can only be given by the United States Federal Aviation Administration. Simply put, the FAA is required to utilize the PMA process to greenlight the design and manufacturing of certain aviation and aerospace parts. Designing, manufacturing, distributing and operating with such a part that has not gone through the approval process is illegal and subject to severe punishments. For more information on how the PMA process works, you can read more about it in the article below.

You can observe a great example of the PMA process when aviation companies need to acquire replacement parts (such as an aircraft brake) for a commercial or corporate jet. In order to procure these parts, they must ensure that the desired piece passes the PMA phase. This involves the FAA identifying airworthiness standards before applying them to the part and then determining the criticality of this part. The two FAA branches involved in implementing this are the Aircraft Certification Offices (ACO’s) and the Manufacturing Inspection District Offices (MIDO’s). Afterwards, aviation authorities would submit a test plan for its design approval and if passed, establish an inspection system to scrutinize the nooks and crannies of the piece.

If the piece passes this phase of the process, the PMA part would then need established instructions for repair and inspection, followed by instructions for a continued operational safety plan. Once everything has been set in place and tests have been run enough times to prove the airworthiness of the part, only then can the ACO and MIDO give the final approval that the part is suitable enough to fly the skies.

At Aerospace Unlimited, owned and operated by ASAP Semiconductor, we can help you find aircraft components and accessories you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we're always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at +1-412-212-0606.


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Aircraft wings are airfoils that attach to the body of an aircraft at different angles and shapes to create lift and sustain flight. Different wing configurations provide variant flight characteristics like the amount of lift generated, the level of control at different operating speeds, aircraft stability and flight balance. Aircraft wings may be attached at the bottom, mid or top of the fuselage. The wing tip can be pointed, rounded or square and the wing can extend out from the fuselage perpendicularly , angled down or slightly up. The angle at which a wing extends out from the fuselage’s horizontal state is called the dihedral angle and this affects an aircraft’s lateral stability.

Wings are mostly constructed using aluminum, but they can also be made using wood covered with fabric, magnesium alloy, carbon fiber, and in modern aircraft, stronger and lighter materials like titanium. The framing of aircraft wings are outlined by beam like spars. The ribs of a wing are connected to these spars and provide sound structure and stability. Lastly, the entire aircraft from fuselage to wingspan is covered in a skin that ensures the aircraft moves through the sky as one unified body.

There are 9 types of wing design that each offer their own unique capabilities. The rectangle wing (not aerodynamically efficient) is your basic non-tapered, straight wing, mostly used in small aircraft, extending perpendicular to the fuselage. Elliptical wings (most aerodynamically efficient) induce the lowest possible drag and their thin wing structure was initially designed to house landing gear, ammunition and guns inside the wing. The chord of a tapered wing varies across it’s span for approximate elliptical lift distribution.

Delta wings are triangular in shape and lay over the fuselage. Their low aspect ratio makes them ideal in supersonic, subsonic, and transonic flight. These wings have improved maneuverability and reduced wing loading but due to their low aspect ratio, do have a high induced drag. Trapezoidal wings offer outstanding flight performance, highly efficient supersonic flight, and have great stealth characteristics. Ogive wings are designed for very high speeds, have minimal drag at supersonic speeds, but are very complex and difficult to manufacture. Most high-speed commercial aircraft use a swept-back wing design that reduces drag at transonic speeds. Forward-swept wings have controllability issues and because of the flow characteristics the outboard wings stall before the flaps. Variable sweep wings were designed to optimize flight experience over a range of speeds and have three modes of extension: straight out to the side, slightly back, and farther back to create a triangle shaped aircraft.

At Aerospace Unlimited, owned and operated by ASAP Semiconductor, we can help you find the aircraft wing components you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we're always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at +1-412-212-0606.


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A helicopter is a type of rotary aircraft in which thrust and lift are achieved through the use of spinning rotors. This allows the aircraft to take off and land vertically and hover at a fixed altitude. Despite helicopters being far smaller than most airplanes, the rapidly-spinning rotors make it very hard to control. Each helicopter is made of five main parts: the cockpit, main rotor, tail rotor, landing gear, and engine. This blog will explain each of the five main parts in further detail.

The cockpit is the brain of the helicopter. It serves as the central control unit and determines all the activity of the helicopter. The pilot and co-pilot reside in the cockpit, however some helicopters do not require two people to control. The four most important control the pilot uses in the cockpit are the cyclic, collective, anti-torque pedals, and throttle.

Just as the cockpit is the brain of a helicopter, the main rotor is the heart. It is perhaps the single most important component of the helicopter. The main rotor allows the pilot to control which way the helicopter turns, changes altitude, and moves laterally. The pilot commands the rotor with the cockpit controls linked to the swash plate assembly. The tail rotor is found at the rear end of a helicopter and is necessary to counteract the torque caused by the main rotor. If the tail rotor were not present, the aircraft would spin in the inverse direction of the main rotor.

Landing gear comes in a variety of types but skids and wheels are the most common. Floats, pontoons, and bear paws are also used. Bear paws are an attachment to skids used when the helicopter is landing off airport on unstable terrain providing more stability. The two types of helicopter engines are reciprocating and turbine. Reciprocating engines use pistons to convert pressure into motion thereby creating power. Turbine engines create power by mixing compressed air with fuel to create high-speed gas to turn the turbine blades.

At Aerospace Unlimited, owned and operated by ASAP Semiconductor, we can help you find all the unique parts for helicopters as well as the aerospace, civil aviation, and defense industries as a whole. We’re always available and ready to help you find all the parts and equipment you need, 24/7-365. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at 412-212-0606.


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A rough look at history will show you that it took humanity more than 10,000 years to invent flying machinery. Yet it was only 66 years later in 1969 that humanity accomplished aeronautical aviation and landed a human on the moon. This goes to show that the more we discover and create, the faster it enables our world to grow. You need only look at these recent years to see that technology is advancing at a rapid pace and the next years are sure to unveil amazing advancements in flight. Read on below for some new concepts emerging in the aviation industry.

Electric Aircrafts

Among the most exciting news to come out in aviation is the optimistic potential for aircraft to be powered by electricity. Currently, airplanes are being designed to use exclusively electricity when on the ground. Professionals are working soon to extend this feat into the air. Having electrical aircrafts replace fuel running airplanes could greatly benefit our environmental health by reducing fuel consumption, as well as air and ground pollution. An electric aircraft would also emit little if any noise, meaning communities near airports could potentially see value rise.

Automation

Smart technology and machine learning have made great strides in the last five years and now that self driving cars have been released into the market, it’s very possible that self driving aircraft will become a standard in the coming years. Remote controlled aircraft is currently being used, but tests with self learning machinery have proven that the latter shows less likeliness of collisions.

Improved Aircraft Experience

Part of what has improved aircraft experience is the increased connectivity that there now is between passenger and cabin crew. While the first years of commercial flight saw passengers having to flag down the newest steward or stewardess, these recent years now have cabin crew and passengers connected via touch screen computers. Some experts speculate that the rise of automation may even present opportunities for the pilot crew to connect with the passengers.

At Aerospace Unlimited, owned and operated by ASAP Semiconductor, we can help you find all the unique parts for the aerospace, civil aviation, and defense industries. We’re always available and ready to help you find all the parts and equipment you need, 24/7-365. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at 1-412-212-0606.


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The NSN system can be dated back to the WWII era when the military would use a specific component that had several different names depending on who supplied or manufactured the component. This made it difficult for the military to locate suppliers, or share items between the different organizational branches. An item could be in short supply in one location, but in surplus in another. To overcome this sourcing issue, the Department of Defense created the NSN system. National Stock Numbers or NSNs, are 13-digit serial numbers assigned to all standardized items within the federal supply chain. All components that are used by the U.S Department of Defense are required to have an NSN, the purpose of which is to provide a standardized naming of components.

Also known as NATO stock numbers, NSNs are recognized by all NATO countries. The NSN can be further broken down into smaller subcategories, each providing individual information about the component. To begin, the first four digits of the NSN are known as the Federal Supply Classification Group. The FSCG determines which of the 645 subclasses an item belongs to. The FSCG is further split into the Federal Supply Group (FSG) and the Federal Supply Classification (FSC). The FSG is made up of the first two digits of the NSN which determines which of the 78 groups an item belongs to. The second 2 digits make up the FSC, which determines the subclass an item belongs to. In the aerospace industry a key federal supply group is FSG 15: Aircraft and Airframe Structural Components. The remaining 9 digits are made up of the 2-digit country identifier followed by the 7 National Item Identification Number (NIIN). The US for example, has the country identifier 00.

A manufacturer can not simply request an NSN. An item must first be formally recognized by one of the following bodies; Military service, NATO country, federal or civil agency, or various contractor support weapon systems. Once they have a specific need for the specific part, the details are then sent over to the DLA for assignment. There are 10s of millions of items with NSNs. They aren’t just assigned to one component either. In fact, entire systems are assigned their own NSN. Aircraft turbine engine have one NSN, while the smaller components of the system have their own. The purpose of this system is to help expedite maintenance and repair programs. To help manage the vast amount of NSNs, each NSN is assigned an item manager, who monitors the stock and supply of the NSN, ensuring that it is readily available military purposes.

Due to the sheer amount of NSNs, the DLA relies on suppliers to source and stock NSNs for various applications. Aerospace Unlimited, owned and operated ASAP Semiconductor, is a premier supplier of NSNs for the aerospace and defense industries. Our large inventory is conveniently listed on our website under various categories such as Federal Supply Groups, CAGE codes, and the manufacturers. Our team of dedicated staff can help find the exact NSN that you need. Visit our website, https://www.aerospaceunlimited.com/, or call us at +1-412-212-0606 to source NSNs today.


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After a plane has been decommissioned it ends up in a dusty parking lot known as a “boneyard.” A boneyard is a massive field that houses aircraft that can no longer fly, where the parts that are still functioning are recycled, or often times, resold. A plane that has been deemed too old to fly can still have a large amount of value. These boneyards may not be spectacular, but they are a heavy contributor into the industry that comprises an “after life” ecosystem. One that spans from hedge funds to specialized recycling firms.  

 
Permanently retired aircraft are slowly but surely dismantled overtime. Their decommissioning fluctuates with the demand for working spare parts. The vessels are inspected for key components that can still serve a purpose, and when there’s nothing left, the remains are melted down for scrap metal. Some sections of the fuselage may be removed and used as training facilities for flight crew, firefighters, or other educational purposes. Breaking down an aircraft requires specialized skills and training—combined with modern technology—to gather, separate, and recycle the different alloys, plastics, and fluids. Often times the aircraft is not recycled, instead it is simply left to rust. Once the plane has been de-registered, it is classed as waste and has to be processed in compliance with environmental regulations. 
 
The amount of parts that can be reused depends on the age of the aircraft. A fairly new A320 aircraft can have as many as 1,200 reusable aircraft components, although most of the value lies in the engine. Their turbines contain rotating blades that must be changed out on a regular basis to stay in compliance with aircraft regulations. Swapping out these blades with used parts can cut repair costs in half. Secondhand landing gear can also fetch a hefty price ($300,00). Approximately $2.5 billion worth of salvaged and recycled parts entered the market between 2009 and 2011. These components can be sold overseas to countries that have different regulatory standards on which parts are still functional. Airlines can purchase spare parts through a third-party reseller, from a government marketplace, or even on eBay. Almost every part of an airplane can be recycled for use in newer planes.
 
The world’s largest aircraft boneyard (AMARG) is located in Arizona and is estimated to hold more than $32 billion worth of outdated planes, including government aircraft. The arid climate in this state slows down the rusting process, prolonging the afterlife of the aircraft. The inventory consists of retired commercial carriers to nuclear capable B-52 bombers, and everything in between. More than 80% of the planes stored here are used for spare parts. When a plane arrives in AMARG it is thoroughly washed to remove any salt on the exterior. Technicians then drain the fuel tanks, cover the tires, and remove any potentially explosive devices (guns or ejection seat activators). They then paint the top of the plane white to deflect the sun’s rays and signify an inoperable aircraft.
 
The life of an aircraft doesn’t end when it is decommissioned. It lives on in the boneyards of the world, providing parts to upgraded versions of themselves and enabling a new market to exist.
 
At Aerospace Unlimited, owned and operated by ASAP Semiconductor, we can help you find all the salvaged aircraft parts for the aerospace, civil aviation, and defense industries. We’re always available and ready to help you find all the parts and equipment you need, 24/7-365. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at +1-412-212-0606.


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“Aircraft engine failure” is one of the most unsettling phrases in the aviation community. Failures of aircraft engine can be caused by a multitude of different parts malfunctions, and/or pilot error. The statistics on the frequency of aircraft engine failures are sparse and convoluted. However, for commercial air travel, most modern twin engine passenger jets are designed to function safely even if one engine fails. Engine failure as a result of part malfunction seems to differ between the type of engine. So, let’s take a look at an industry standard—turbine engine failure.

 
Statistically, the most immediate problem that ensues as a result of engine failure in a turbine engine is loss of thrust. Thrust propels the plane forward consistently at a predetermined altitude. This is part of achieving what the pilot on a commercial aircraft announces as “cruising altitude”. Without thrust, the plane starts to lose altitude. The speed at which this happens depends on the damage to flight control surfaces. If the aircraft wings, tail plane, or ram air turbine are damaged, engine failure can quickly become a more serious problem. A pilot will need to glide the aircraft to safety. Aircraft pilots should have completed thorough training to know how to calculate the altitude and angle in which they can bring the plane to safety, and where to do so. Due to the dual engine system in a jet aircraft, only a record of 3 engine failures resulting in gliding have occurred in the last decade.
 
Aircraft maintenance and regular inspections are integral to ensuring that aircraft parts are not vulnerable or damaged in order to prevent engine failure. Reported aircraft engine failures in the last fifty years total under 10— and they are typically caused by poor decisions or judgment from the pilot and/or crew. Extreme weather events leading to malfunctions are also common sources for engine failure, so scheduling regular inspections of parts is essential as a preventative measure to avoid engine failure on your aircraft.
 
At Aerospace Unlimited, owned and operated by ASAP Semiconductor, we can help you find all the Pratt & Whitney aircraft parts and aircraft engine parts assemblies you need, new or obsolete. As a premier supplier of parts for the aerospace, civil aviation, and defense industries, we’re always available and ready to help you find all the parts and equipment you need, 24/7x365. For a quick and competitive quote, email us at sales@aerospaceunlimited.com or call us at +1-412-212-0606.


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The Rolls Royce Trent 500 engine is a complex piece of machinery that is the operating force behind Airbus’ A340, -500, and -600.  Its design was based off the RB211 line of three-shaft engines, which has consistently proven to be a reliable engine model.


The Trent 500 is Rolls Royce’s profit generator because it allows for a better payload – thanks in part to its lightweight design and high levels of fuel efficiency.  This engine also boasts outstanding in-service margins, allowing for longer lengths of time between maintenance and lower repair costs.
Some key features of the Trent 500:

  • 53K or 56K pound take-off thrust
  • Single crystal high-pressure turbine blades
  • 97.4” wide-chord fan diameter, made of lightweight titanium – protects against any damage from foreign objects
  • Tiled Phase 5 combustor – provides the lowest levels of pollution and noise       
So how do aircraft engines work?  They start by pulling air into the front of the aircraft via a large blade fan.  Next, a compressor raises the air pressure and internal blades start spinning and squeezing the air.  Once compressed, the air is mixed with fuel and a spark lights the mixture, shooting jets of burning gas out the back and thrusting the aircraft forward.  The hot air then passes through the turbine, causing the compressor to spin.  Although this is a very simplified explanation, this is the basis of how all aircraft engines work.

Within the engine, there’s something called an integrated drive generator (IDG).  This component connects to the aircraft gearbox and converts the shaft power into constant frequency electrical power.  Inside the Trent 500, there are four IDGs that work together to meet the A340’s level of power requirements.  These are important because they act as a governor, keeping the aircraft at a stabilized speed.

Aerospace Unlimited, owned and operated by ASAP Semiconductor, is an online distributor of aircraft engines and engine-related components, with aircraft repair capabilities.  With a continuously increasing inventory, you can be sure Aerospace Unlimited will have everything you need and more.  Aerospace Unlimited is known for finding cost-effective solutions for hard-to-find aircraft parts. We will ensure all your needs are addressed in a timely and professional manner.  For a quote, reach out to our main office by phone: +1-412-212-0606 or by email: sales@aerospaceunlimited.com.

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The Airbus Group A380 production is a massive undertaking, assembled in Jean Luc Lagardere Plant, which is in at Toulouse Blagnac Airport located in France. The parts are shipped from all over Europe to be assembles at the plant and sent for orders. The aircraft wings are made in Wales, the rear fuselage is made in Hamburg along with the vertical tail fin, the forward and center fuselage are made in France, the horizontal tail is made in Spain.


The aircraft has over 4 million parts made by 1500 companies from more than 30 countries around the world. These parts are massive components and is difficult to transport. However, this is how it is done. The first order was made by Singapore airlines in 2007, and since then they have made over 200 aircraft.

One of the most amazing things about the Airbus is that they have their own army of ships to ship all of these components to be assembled. 3 boats to be exact and are even customized to their needs for transporting aircraft parts. Six of the major components of the aircraft are transported by boat, only one is done by aircraft, the vertical tailfin inside a Airbus A300-600ST otherwise known as the Beluga. This plane still isn’t large enough to transport the other 6 major parts. These boats make a 8 day journey travelling 335 kilometers through the rivers in Europe. Once the parts are delivered by boat, they need to hit the road, they only travel at night when traffic is low due to the massive size of the parts and the truck that moves them. One of the most amazing things that a road was built for these transports, so that the cargo transport isn’t disturbing towns people in rural France.

Aerospace Unlimited owned and operated by ASAP Semiconductor, should always be your first and only stop for all your hard to find fuselage parts, and aviation fasteners. Aerospace Unlimited is the premier supplier of aerospace components, whether new, old or hard to find, we can help you locate it. Aerospace Unlimited has a wide selection of parts to choose from and is fully equipped with a friendly staff, so you can always find what you’re looking for, at all hours of the day. If you’re interested in obtaining a quote, contact the sales department at www.aerospaceunlimited.com or call +1-412-212-0606.


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All those aircrafts you see sitting in aircraft graveyards rusting away hold more value than the average individual would think.  The moment an aircraft reaches the end of its life cycle it instantly becomes a treasure to several different parties. The decision to retire an aircraft is based upon airplane parts cost versus airplane flight cost. Once a planes’ parts have become of more value than the plane flying, the aircraft is deemed “retired”. In most cases, it takes an aircraft close to two decades to even be considered for retirement, although some could be retired before reaching half a decade.


Once an aircraft is retired the most valuable components are stripped and reused. The aircraft frame is then cut and taken to training facilities for educational institutions, firefighters or flight crews. Once the aircraft is deregistered, the parts will be sold for scrap. Breaking down an aircraft requires special skills and knowledge of specific technology to determine which parts hold value and which parts are trash. When an aircraft is not de-registered it cannot be scraped and is ultimately left to rust, which is why aircraft graveyards exist.

The value that scrap parts can potentially hold has drawn extreme attention from hedge funds and investment firms. Although most of the value is held in the engines, the spares market is growing rapidly. The scramble to get into this market is huge; therefore, driving up the overall value of aircrafts.  Although aircraft parts are highly regulated, about 2% of the market is still counterfeit. This is a huge issue for the market, making it important to correctly inspect and test all parts before being installed on an aircraft. 

Aerospace Unlimited, owned and operated by ASAP Semiconductor, should always be your first and only stop for all your hard to find and urgent aircraft needs. Aerospace Unlimited is the premier supplier of delta aircraft parts, whether new, old or hard to find, they can help you locate it. Aerospace Unlimited has a wide selection of parts to choose from and is fully equipped with a friendly staff, so you can always find what you’re looking for, at all hours of the day. If you’re interested in obtaining a quote, contact the sales department at www.aerospaceunlimited.com or call +1-412-212-0606


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Much like other automotive devices and machinery, along with aircrafts alike are all susceptible to failure. Airplanes suffer for a higher risk of accidents as they descend from thousands of feet high at an alarming rate. Much more often than the average person is aware of, failing landing gear is a common problem with aircrafts throughout the industry.


When the landing gear fails, the aircraft is still expected to land as it would normally but performs what is known as gear up or also known as belly landing. Although aircrafts suffer the ongoing risk of possible fires and extensive damage to the aircraft, if executed correctly the landing should be tolerable per case studies, according to telegraph.co.uk.

Many unexpected incidents have been able to land safely as well as other accidental events that have caused aircrafts to turn back a while after taking flight. Much like after two pilots that carried an approximate 99 passengers on board forgot to retract their landing gear shortly after ascending for takeoff. One very popular case that has found its way into US Pilot, Patrick Smith, recently released book Cockpit Confidential where he studies the failure of landing gear.

The book analyses a televised event that airline, JetBlue had to endure and perform an emergency landing in Los Angeles. This horrific event took place in the year 2005, when an aircraft leaving Burbank, California had to perform a belly landing but experienced its tires twisted sideways. As the pilots noticed its problem they quickly became aware that the aircraft would be to heavy for landing on LAXs longer run ways. The aircraft had to endure three hours of flying before it could reach the appropriate weight for landing. The book reads

“On board, 146 souls readied for what, according to the commentators, could very well be a devastating crash. Those of us who knew better... saw a jetliner preparing for what would be a telegenic but perfectly manageable landing. And that's what we got.”     

 
Aerospace Unlimited is a prime aircraft landing gear component and aircraft parts provider. Providing the most modern to the parts that have been deemed obsolete. All our parts have been tested and placed under warranty to ensure extensive traceability. For an instant RFQ please give us a call at +1 412 212 0606 or email sales@aerospaceunlimited.com.

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