Benefits of the APU (Auxiliary Power Unit)

While many are aware of much of the aircraft equipment and systems that provide for propulsion, flight, and safety, the APU (Auxiliary Power Unit) remains a fairly underappreciated component. The APU is a device that provides energy for vehicle functions that are not related to propulsion, and they are very common across large aircraft. In this blog, we will discuss the APU in more detail, as well as its importance to various aircraft operations.

Unlike similar aircraft equipment and systems, the APU serves as an independent system that functions either on the ground or during flight. The APU mostly provides for electrical supply during the event of an emergency, rather than for propulsion. With an APU, the main engines of the aircraft may have their startup ability maintained for safety. When engines are shut down, such as during ground operations, the APU may also supply electrical energy and air conditioning to save money and fuel.

In terms of engineering, the APU is a gas turbine which is made up of three main sections that provide for its functionalities. The first part, the power section, serves as the turbine engine that powers the APU itself. Next is the load compressor of the APU, allowing for a supply of pneumatic pressure for aircraft functions. Finally, the aircraft gearbox is used to transmit APU power to an electric generator. This power transferred to the electric generator is then used to provide power for the aircraft.

In general, the main benefits of the APU are its cost savings and independent functionality, the two often coming hand-in-hand. As the APU can provide for powering and air conditioning while the engine is off, operators can save money and fuel costs, also leading to reduced engine maintenance costs as well. This energy independence furthers cost savings due to being able to use the APU for other electrical operations, such as during maintenance activities. By using the APU, operators can avoid having to pay an airport to use their energy, if there is an accessible power supply available and provided in the first place. With an APU, operators have access to a steady supply of electrical and pneumatic power.

In the case of an emergency, APUs can greatly increase the safety and functionality of systems. If the engine were to fail during a flight, the APU would take over the powering of the aircraft, providing for electricity and air conditioning. The APU may also be used to restart the engines in the case of a failure, permitting for a safe landing without risk. Beyond safety concerns, APUs may also be used for some essential in-flight phases, such as during the initial ascent. In this stage, the APU provides pneumatic energy for aircraft functions until a specific elevation is reached. Currently, the APU continues to be developed and improved upon, increasing their cost saving applications and emergency abilities. When it comes time to begin sourcing the APU (Auxiliary Power Unit) components and aircraft parts that you need for your next project or operation, Veritable Aerospace has you covered with everything you are searching for.

Veritable Aerospace 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 AS9120B, ISO 9001:2015, and FAA 0056B certified enterprise. For a quick and competitive quote, email us at sales@veritableaerospace.com or call us at +1-714-705-4780.

Releted Parts: WE3800700-1, 65393-04019-101