B777 Thrust Asym Comp/ ECS questions
Hi,
I have a few specific and a few general questions, any answers greatly appreciated...
On the 777, overhead in the cockpit there is a 'Thrust Asym Comp' button. I assume this is for asymetrical thrust compensation...is this correct. Does this equate to, for example, loss of one engine after takeoff with thrust asym comp enabled, and the plane without autopilot enabled the plane will still fly in the same direction due to automatic correction of this without any anti-yaw control inputs by the pilot necessary; or does it simply keep the thrust of the two engines constant through the FADEC when the throttles are slightly unequally pushed forward??? (Does the 777 even have FADECS??)
Second question relates to the environmental control system of aircraft:
Do aircraft contain any active aircon cooling systems. From my limited knoweledge I beleive inflight the engine bleed air is cooled partly through heat exchangers in the engine nacelle and the wing for anti ice, but most of the heat is taken away by a heat exchanger in the aircon packs that exchanges the heat with cold air from outside. How does this work on the ground, especially in hot climates. Do modern aircraft contain a phase change cooling system for use on ground to keep the interior of the aircraft cool(e.g. like a fridge or nomal Aircon system) which I suspect would be far to heavy or perhaps a peltier solid state silicon cooling system (prob too expensive..??)
Thanks for any help, please excuse any mis-use of terminology or ignorance regarding the subjects I am discussing, sadly I'm just a Bio sciences uni student...
Cheers,
tom.