Given the sometimes high cost of state-of-the-art auxiliary power unit systems to provide in-cab climate control without idling the truck – complete systems can range from several thousand to more ...

A Sikorsky-Boeing team selected a modified version of Honeywell's GTCP 36-150 APU, main engine generator, and APU generator for its Defiant X helicopter. (Sikorsky-Boeing) A Lockheed Martin ...

An Auxiliary Power Unit (APU) is a small turbine engine primarily used on the ground to provide electrical power, bleed air for cabin heating/cooling, and assist in starting the main engines. Key ...

— -- Question: I can see the jet engines under the wing but I have noticed exhaust exiting the tail cone of some aircraft. What is this, as there isn't an obvious rear air intake? -- submitted by ...

The traditional role of the auxiliary power unit (APU) has been to provide electrical power and pneumatic supply for air conditioning and main-engine starting when aircraft are on the tarmac. That ...