Hi everyone, I've been really enjoying flying the C-101EB lately and decided to look in more detail at some of the systems.
One of the things I wanted to know was what the purpose of the Fuel Boost Pump. From the manual I read that it "permits inverted flight for about 30 seconds". Interesting, so from the manual it seems to be the case that the boost pump is only needed for inverted flight, and otherwise the fuel will be fed just fine by gravity.
Based on this I thought I'd try an experiment. I gained altitude, switched off the fuel boost pump and rolled the plane into an inverted attitude. My expectation was that the fuel flow gauge would begin to drop, and eventually the engine would be starved of fuel. This part of my expectation was correct. However, I also expected that once I'd returned the plane to level, gravity would continue to do its job and the fuel flow would increase back to normal. This in fact did not happen, the fuel flow continued to drop and I was not able to get it back up, resulting in an engine failure. Even switching the fuel boost pump back on was not enough to restore the flow of fuel.
Just for my curiousity I wanted to ask, is this realistic behaviour, and if so, why does it happen? Are there any experts here who can tell me?
Thanks for reading.