When moving an aircraft away from the airport gate or out of a hanger, a towbar is an indispensable piece of equipment. Aircraft engines are powerful, thus if used in close proximity to equipment and structures, they can pose serious damage or safety risks. Engines are expensive to run, and thus it is not beneficial to spend fuel that is best reserved for takeoff and flight. Because of these concerns, towbars along with pushback tractors are used to safely taxi aircraft around a runway. As aircraft come in many types and sizes, choosing the Right Aircraft Towbar for your needs is important.

Every aircraft has a specific type of connection, just as towbars may have various capacities and abilities. Across most aircraft, there are a few Standard Types of Towbar that may suit your needs. These include light aircraft, multi-head, commercial, and application specific towbars.

Light aircraft towbars are some of the most simple and portable types for the movement of smaller aircraft. With these towbars, the head is often attached to the Nose Wheel or tail wheel and can then be pulled by hand via a handle. As these are unpowered and lightweight, they are best suited for light aircraft under 12,500 lbs.

Multi-head towbars are very versatile and can encompass a wide range of aircraft models. This is because they allow for towbar heads to be interchanged for each type of aircraft that is to be moved. Multi-head Towbars are very beneficial as only one towbar would need to be owned while multiple heads can be purchased separately, saving both room and money. Multi-head towbars are usually either standard or heavy duty in design.

Commercial towbars are a much more heavy duty type that require attachment to a tug or tractor for aircraft taxiing. This is due to the fact that they are designed to move Large Commercial Passenger Planes and thus must be able to pull upwards of one million pounds. Once the head is attached to the aircraft, the pilot and the tug driver communicate together as the aircraft is taxiid to its destination safely and soundly before takeoff.

Lastly, there are many application specific towbars that may feature a range of heads and bars depending on the type of aircraft that is being pulled and are typically designed for a specific model. Altogether, when deciding which towbar is best suited for your needs, it is important to consider your aircraft, how much space you have for the amount of towbars or types you need, and other various factors.


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As the heart of any automated machine, the engine requires a substantial amount of attention and care. Without a properly-functioning engine, your automobile, no matter how sophisticated, will be rendered obsolete. To help keep your engine clean and operating smoothly, manufacturers install air and Oil filters to stop particles of dirt and grime from coating or entering the engine.

The first function of air filters is to help your engine ‘breathe.’ If not for oil and air filters, much of the debris you find on the front of your car and license plate - be it dead bugs, mud, or other contaminants - would make its way into your engine. Once in the engine, these contaminants can cause abrasion, corrosion, and diminish the general performance of the engine. Air filters are usually encased by a plastic box, providing further protection from impurities.

Over time, debris will accumulate making it necessary to replace your oil filter. A dirty air filter will still protect the engine, but also prevent it from receiving the proper amount of air, a crucial ingredient in the Combustion Process. In theory, your air filter could get so dirty that the engine won’t run at all, but the more likely outcome is a loss of performance capabilities.

Oil filters play a different but equally pivotal role in maintaining the cleanliness of your engine. If the engine is the heart of a car, the oil is the blood that courses through the heart. Engine oil passing through the oil filter is scrubbed and detrimental impurities are removed. Tiny particles of dirt or metal can be abrasive and wear down Engine Bearings that causes low oil pressure. Just as air filters can become clogged and need replacement, so too can oil filters. When this happens, dirty oil keeps recirculating through your engine and harms performance.


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When we think of aircraft functionality, we tend to forgo the importance of the wheels and brakes. Although the main functionality of aircraft is to fly, wheels and brakes are what enable the aircraft to both start movement, and safely land at their various destinations. They are expensive and important components, and often are subjected to great deterioration with every flight. With wear and tear of any aerospace part comes the need for maintenance, repair, and overhaul (MRO).

Wheels and brakes find the need for MRO services once the tire tread or brake friction becomes worn to limit. These components have the ability to be replaced a certain number of times before they should undergo full overhaul for safety. Intervals are set to limit the amount of changes that a tire can undergo before a full overhaul is required, and brakes follow a similar schedule. Despite these guidelines, many operators neglect overhaul and stick to simply changing their tires, often leading to great corrosion that can cause the unit to become irreplaceable. Overhaul is important as corrosion is a major problem with environmental extremes that parts are subjected to during constant use.

Contrary to popular belief, it is the sharp turns during operation that wear a tire and brake system more than the aircraft landing process. Factors that also decrease the life expectancy of tires and brakes include increase of flights during the summer and thus hot conditions and runways, as well as compact inner city airports. Improvements and breakthroughs of tire and brake technology on newer aircraft are helping to steadily increase life expectancy. Nevertheless, legacy aircraft with unchanged technology have long lifespans and continue to have great wear and tear with their continued use.

Independent MRO services are quickly growing as a competitor to original equipment manufacturers around the world, especially for smaller airlines and those that operate with mixed wheel and brakes. With these airlines, independent MRO serve a better opportunity for servicing their fleets and operations. Nevertheless, with each flight, aircraft come closer and closer to the need for servicing.


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Memory in a computer is any hardware that can store data for any amount of time. If a computer memory is volatile, the information stored on the hardware is lost after the power source is disconnected. In contrast, non-volatile computer memory retains the stored information. Under these two broad categories are many subtypes of memory.

RAM (Random Access Memory)

RAM allows the user to access any part of the memory in the same amount of time. It is used to store the programs and data being used by the central processing unit (CPU) in real time. The data can be read, written, and erased any number of times.

DRAM (Dynamic Random-Access Memory)

DRAM is a volatile memory. The information is lost within a couple of seconds of the system shut off. The bits of the memory are stored in the small circuit.  In DRAM there is just one transistor and one capacitor. Capacitors slowly lose some of their charge, so a timer circuit delivers an electrical charge to the capacitor every few milliseconds.

SRAM (Static Random-Access Memory)

SRAM loses the data almost instantaneously after system shut off. A SRAM circuit is arranged in a flip-flop design which maintains the correct charge state for the entire time that the memory is connected to power. Although SRAM is by design the faster type of memory, it does come with a higher price tag than DRAM and is therefore not as popular.

ROM (Read Only Memory)

ROM is a type of non-volatile computer memory. It usually comes in the form of a chip located on the motherboard.  Data is not lost after the system is shut down. ROM is used for firmware such as system startup programs. You cannot add or modify this type of memory. Manufacturers write the memory; however, subtypes of ROM have been developed to allow user modification.

PROM (Programmable Read Only Memory)

The data is written after the memory chip has been created. The setting of each bit is locked by a fuse or antifuse, which means that PROM can only be programmed once after creation before the information becomes permanent.

EPROM (Erasable Programmable Read Only Memory)

As the name suggests, EPROM can be erased and rewritten. EPROM is used for applications where the data needs to be frequently changed. It can be identified by the quartz crystal window that exposes the chip to ultraviolet light used to reprogram the chip.

EEPROM (Electrically Erasable Programmable Read Only Memory)

This type of memory can be erased and reprogrammed repeatedly through the application of higher than normal electrical voltage. It is used for storing minimal data quantities that need to be changed regularly. The nature of this type of memory results in a shorter life span than other computer memories.

Flash Memory

Flash memory falls into the category of non-volatile memory. Invented by Toshiba, flash memory is a specific type of EEPROM that is programs and erases data in terms of blocks. Flash memory is used for easy and fast information storage in computers and various other electronic devices. It is a portable memory that acts almost like a hard drive.


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A DIMM (Dual Inline Memory Module) is comprised of a series of dynamic random-access memory integrated circuits. This small piece of technology has the fascinating ability to provide central memory storage and data directly to the CPU it is in tandem with. It was evolved from its predecessor, the SIMM, and is capable of maintaining double the data path at 64-bit. The DIMM is also twice as small, leaving room for other components within the CPU.    

With only one circuit board installed on the DIMM (dual in-line memory module), it substantially increases both memory speed and storage. It is manufactured with 168 pins which enable them to connect to the CPU’s motherboard with ease. On the bottom edge of each one of these pins lies two notches. The location of each notch designates a certain feature of the module. The first notch facilitates the dynamic random-access memory utilizing a high-bandwidth interface. The second notch corresponds to the voltage position. 

DIMM is not strictly limited to PCs as it can be applied on a wide range of electronic products including networking hardware, netbooks, and printers. The versatility of this technology adds to its impressive capabilities. The command address and control signals are buffered on the DIMMs as well. This buffering reduces the loading efforts of the memory function in Cabin Dome Lts Dimm.

The more DIMM slots your motherboard has, the more RAM you can install. Motherboards support anywhere from one to eight DIMM slots, however, most mainstream motherboards have four. You may be asking yourself, how many DIMM slots do you actually need? The answer to this question depends on how much RAM storage you desire. 32GB worth of RAM-which is more than enough-can be achieved with two DIMM slots.

DIMMs are available in four variations: SDR (single data rate), DDR (double data rate), DDR2, and DDR3. The DDR2 and DDR3 are the upper echelon in terms of capabilities and potential.

Before selecting which version of DIMM is best suited for your motherboard, consult your motherboard documentation for the correct memory speed and type for your system. If a system requires a specific speed for the memory module, a substitute with faster speeds is almost always able to function the same if the specified one isn’t available.


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One of the most important aspects to consider when looking for a new computer is probably the memory. In Computer memory, the storage space in the computer where data is processed and stored, making it one of the determining factors in how well your computer performs. In general, there are two types of computer memory: primary memory and secondary memory.           

Primary memory is the computer memory that is directly accessed by the central processing unit (CPU). When you turn your computer on, the primary memory loads the operating system, user interface, and all other software utilities. Every application-specific task is carried out thanks to the interaction between the primary memory and the system processor. There are two types of primary memory: RAM and ROM.

RAM, or Random-Access Memory, is a volatile-type memory that stores data temporarily in specific memory slots. RAM allows the computer to read and write data near instantaneously, making it a very fast and responsive type of memory. The more RAM your computer has, the more data you can load, and the better your computer performs overall. However, the same principles that make it so fast are what makes it volatile; because the data is stored temporarily, when the computer is turned off, the data is lost. Within RAM, there is Dynamic RAM (DRAM), Static RAM (SRAM), Direct Rambus RAM (DRDRAM), Synchronous Dynamic RAM (SDRAM), Double Data Rate SDRAM (DDR SDRAM), and their respective successors.

ROM, or Read-Only Memory, is a non-volatile-type memory that retains all data in permanent memory slots. Because the data is permanently stored, no data is lost when the computer is turned off. Typically, ROM is unalterable, so it’s used to store firmware, which has little to no necessary updates or changes. However, recent advances in memory technology means that there are such things as Programmable ROM (PROM), Erasable Programmable ROM (EPROM), and Electrically Erasable Programmable ROM (EEPROM).

Secondary memory, as opposed to primary memory, is an external computer memory that is permanent. This is where data and programs are saved for longer periods of time. The data can be altered and changed, but they are “permanently” stored in secondary memory media. Secondary memory also tends to have much larger capacities compared to the computer’s primary memory. Hard Drive Disks (HDD), magnetic disks, magnetic tapes, Solid State Drives (SSDs), and USB memory drives are all examples of secondary memory.

Without primary memory, the CPU cannot access the necessary data fast enough for the user to use applications or programs smoothly. If the CPU had to access data from secondary memory like the hard drive, then the computer becomes so slow that it’s essentially useless. But, at the same time, primary memory is so limited in how much space it can have while still being quick and efficient, hence the need for slower but larger secondary memory. Next time you go shopping for a computer, think about what type of work you’ll be using it for— that will determine how much memory you need.

At Expedited Quoting, owned and operated by ASAP Semiconductor, we can help you find all the computer memories and RAM modules you need, new or obsolete. As a premier supplier of parts for the aerospace, 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@expeditedquoting.com or call us at +1-857-323-5480.



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When operating any type of equipment from a cell phone to a jet plane, you’re provided with the status information of the equipment or machinery in question.  For example, your cell phone constantly tells you what the battery life is at and how much cell signal you get. Your car tells you how much fuel is left, how fast you’re driving, etc. As the sophistication of the equipment increases, so does the need for accurate and reliable instrumentation.

This is undoubtedly true for aviation. Aircraft pilots need to be able to confidently rely on the provided information to maintain safe flight.  There are three main classifications of aircraft instrumentation: flight instruments, engine instruments, and navigation instruments

Flight instruments are paramount to the operation of the aircraft.  Flight instruments parts include an altimeter for altitude; a magnetic direction indicator, which a type of compass; and an airspeed indicator.  Additional instruments include an artificial horizon indicator and various other such indicators. These indicators are typically placed in the center of the console or display for visibility to the pilot and co-pilot. 

Engine instruments are essential information that must be relayed to the operator continuously.  Engine instruments include: fuel indicator; fuel pressure; oil levels and oil temperature; inlet and exhaust temperatures; manifold pressure; etc. Multi-engine aircraft often have duplex gauges that display multiple independent readings.  Constant monitoring of the engine instruments is paramount, especially because we rely on the engines to get us from point A to point B.

Navigation instruments are used to maintain and guide pilots on their desired course.  Radio waves used to be the biggest part of navigation, now the integration of the Global Positioning System (GPS) is much more common because it offers accurate and reliable information. 

These days, there’s been a digital takeover of the cockpit, often replacing analog instruments for a display screen.  This advancement in technology is great for decluttering the cockpit.  But simple analog instruments are still used for redundancy in the event of electrical issues.  These reliable flight instruments are operated by air pressure and gyroscopes. 

Expedited Quoting, owned and operated by ASAP Semiconductor, is a premier supplier of aircraft instrument parts and avionics components. Whether new or obsolete, we can help you find all the parts you need, 24/7x365.  If you’re interested in a quote, email us at sales@expeditedquoting.com or call us at +1-857-323-5480.


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