I never said it was impossible, just complex!

The bleed temp depends on where you bleed it from, of course, our engines are single stage compressors so you don't really have much choice. On the big jets, bleed air is taken from several different compressor stages at different temperatures. It passes through a regulating valve and then through a precooler (heat exchanger) where the heat is exchanged through cold ram air from the fan section (another valve), before it is passed on into the aircraft for use. I would love to have onboard electrical generation and bleed air, but it becomes a big departure from the KISS concept that I love!
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Well I agree with that, our jets are complex enough. When I anylise why I want an air bleed system it is because I have had problem with pressure loss due to my brakes. So in retrospect I think I will buy some better brakes that don't leak half the time and add simplicity.
Regards,

John.