Date: 18 Jun 99 01:39:39 From: PSLEIGHT <PSLEIGHT@tinyonline.co.uk> References: 1 Followups: 1
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Andrew van der Plas wrote in message ... >Why do aircraft usualy start first engine 2 and then engine 1, on a >two-engined airplane. As far as i know the reason for this is that passengers will always board the aircraft from the port (left) side which is where the left engine located (numbered as No1 on a twin jet or No1 and 2 on a four engine aircraft). To reduce time needed to start engines and provide air con, the No 2 engine is started as there is no risk of injury of pax running into the props or being sucked into the engine intakes. Generallty the No 2 engine is started from pneumatics from the APU and the No 1 from cross feed from the air supplied by the No 2 engine on a twin engined aircraft. Except for concorde which doesn't have an APU or some prop aircraft, in their cases external air start is required.