the only usual way to start a engine before push is with a ASU if the APU fail. But as you reject many times my request about that it can not be simulatet. So...how will you get the engine startet with a not simulated ASU and a not working APU ??
You are really amazing, this is PRECISELY in line with the decision to not have a FAKE ASU, which has been explained to you so many times already, yet you keep not want to understand it.
Let's explain it again: aA fake ASU/GPU won't be of any help on a default airplane, because such system doesn't exists on them, and users of 3rd party airplanes that have a WORKING one, will just want to disable a fake one provided by GSX, because it will be just an hindrance.
So, with this feature, we are allowing users of airplane with a working ASU, to simulate that inoperative APU procedure, start one engine with their own working ASU, and not being pestered by GSX that would have complained to immediately put parking brakes on.
And, of course, there are some airplanes that DO NOT have an APU to begin with....
So, it's exactly the opposite as you said: this option makes perfect sense, and it's entirely in line with the correct decision of not adding a fake ASU/GPU that most of the users of the advanced 3rd party airplanes would simply turn off, but still allowing them to simulate more kind of procedures.
But that's besides the point. The point is that MANY have asked for it, so we made it. If someone else (but they must be in significant numbers), in addition to you, would ask for a fake ASU/GPU, we might as well add them too.
