| 摘要 |
<p>There is a necessity to provide power for some aircraft service functions whilst the main engines (34) are not operational, for example when the aircraft is on the ground, and to start the main engines (34). This demand is met by provision of auxiliary power units (21). Conventionally a single auxiliary power unit (2) is located in the tail of the aircraft and requires fuel lines and relatively high capacity electrical cabling in order to provide electrical power for main engine starting and service functions. The present invention provides an auxiliary power unit (21) mounted on each main engine (34) and coupled together through an electrical distribution system. This provides greater redundancy in the event of failure of an auxiliary power unit (21) as well as reducing overall weight.</p> |
