gas turbine ignition system

#2. A typical APU can provide:

• AAir for air conditioning on the ground.
• BAir for engine starting.
• CElectrical power for ground or in flight use.
• DAll of the above.

#1. The low energy ignition system would be used:

• AOnly for starting the engine on the ground.
• BDuring take off from wet runways.
• CFor re-light at high altitude.
• DDuring a blow out (motoring over) cycle.

#3. The advantage of an air starter system is that:

• AIt is safer in operation than other systems, and no fire risk.
• BIt is light, simple and economical.
• CIt provides a more rapid start.
• DIt is totally self contained and needs no external source of power.