The Boeing 727 in 1963 was the first jetliner to feature a gas turbine APU, allowing it to operate at smaller airports, independent from ground facilities. The APU can be identified on many modern airliners by an exhaust pipe at the aircraft's tail.

Back in 2003 Boeing conducted tests of a Solid Oxide Fuel Cell (SOFC) APU. The SOFC uses jet fuel as the reformer in the proton exchange membrane to give a 440kW APU that is 75% efficient compared to the conventional 40-45% efficient APUs.

CHICAGO and PARIS, Feb. 13, 2019 / PRNewswire / -- Boeing [NYSE: BA] and Safran [EPA: SAF] today announce the name of their 50-50 joint venture to design, build and service Auxiliary Power Units (APUs): Initium Aerospace. From its Latin roots, initium means 'the beginning' or …

The Pratt & Whitney APS5000 APU is the industry's first all-electric APU for large commercial aircraft. This single-shaft, variable-speed gas turbine APU develops 450kVA of electrical power at sea level that starts and operates up to 43,100 feet. The APS5000 APU was designed exclusively for the Boeing 787 Dreamliner.

With more than 95,000 APUs produced and more than 36,000 in service today, Honeywell has a large APU installed base and is poised for further growth.APUs provide: Start power for main engine(s) Pneumatic power for environmental control systems

Jul 24, 2023 · The Auxiliary Power Unit (APU) is a vital component of the Boeing 737 aircraft. It functions as an independent power source, supplying electrical power and pneumatic energy during various flight phases. The APU enhances the operational flexibility, reliability, and efficiency of the aircraft.

Jun 4, 2018 · Boeing [NYSE: BA] and Safran [EPA: SAF] have agreed to jointly design, build and service Auxiliary Power Units (APUs), creating better value for customers and for both companies. An APU is an...

Feb 5, 2021 · Boeing and Safran have frozen their Initium Aerospace auxiliary power unit (APU) joint venture, citing the dire state of the commercial aircraft market.

Boeing has started flight tests of a Solid Oxide Fuel Cell (SOFC) APU. The SOFC uses jet fuel as the reformer in the proton exchange membrane to give a 440kW APU that is 75% efficient compared to the conventional 40-45% efficient APU's.

Dec 7, 2023 · The Boeing 777's Auxiliary Power Unit (APU) is a crucial component, providing both electrical and pneumatic power to the aircraft whether on the ground or in flight. The APU, an AlliedSignal Engines 331-500 model located in the tail cone of the aircraft is controlled and monitored by the APU controller (APUC).