Tim Capps wrote on Aug 30^th, 2010 at 12:00am:

That happened to me, for example, in taking these screenshots.

You should have used a faster shutter speed on the camera Tim! ;D ;D ;D Just kidding. Nice work!

When I tested that the other day, I turned on the External Power, External Air, had everything set the same as you have shown us there and I didn't start the engines. I walked away from my computer for about 35 minutes and I was still able to start the engines. I have not tried it beyond that length of time yet. So it is a question of how long before you are no longer able to start the engines.

Mark