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Wouldn't they also have to place an electric air conditioning system on the plane as well? When they disconnect the shore power at the terminal, the air does n
by mehmehshoe 13y ago
Wouldn't they also have to place an electric air conditioning system on the plane as well? When they disconnect the shore power at the terminal, the air does not come back on until the engines spin up.
edit Read the comments on the article page and a reply stated the APU powers the ac.
http://www.princeton.edu/~achaney/tmve/wiki100k/docs/Auxiliary_power_unit.html http://www.princeton.edu/~achaney/tmve/wiki100k/docs/Auxilia...
- WalterBright 13y agoThe APU was a nice advance in that it enabled getting rid of the ground cart - which provided power to the airplane when its engines were off, and also provided the electric power needed to start the engines.
- omegant 13y agoAir conditioning and electricity are suplied by the APU, not only by the ground units. For engine start up you must use the air presure(the startup motor is pneumatic not electric), that's why you don't have air conditioning till the engines are running, but you can have it till the moment that you begin pushing back. Also low cost companies try to save every cent so they don't use the APU till they have to start the engines. This can be pretty unconfortable when you have more than 28C inside, but they don't care too much. Edit: redaction.