Originally Posted by Hydro Junkie

I beg to differ again. For a turbine engine to work AT ALL, it is constantly pulling air into the front fan. There is no way for it to pull air into said fan and not have negative pressure AT ALL TIMES!!!!!!!!!!!!!!!!!!!!!!! Roughly 80% of the air pulled through the fan goes around the engine, creating an equal percentage of thrust. The other 20% goes through the various stage compressors, through the burner cans, through the hot section turbine blades and out the exhaust at the rear. The hot section turbine blades, in turn, power the compressor stages and the front fan. I don't know about anyone else, but, as I see it and knowing turbine engines as well as I do, without having negative pressure in front of and inside of the engine inlet when that engine is running, THAT ENGINE WON'T BE RUNNING AT ALL, REGARDLESS OF ALTITUDE OR SPEED