Stupid question: How in the hell do you get a compressor to stall in normal, everyday airline flight in a modern airplane?
(Emphasis on "flight" initial takeoff power-up or reverse thrust on the landing roll on the #2 engine of a 727 doesn't count!).
Poor engine management
Dirty compressor
Wind shear across the intake
Ok, thanks Robert, but I'd love to hear a little more.
RH: Poor engine management
3WE: I can't say I've ever read of modern jet engines stalling
in flight - especially with all the modern FADEC stuff that supposedly controls fuel flow to address jet engines quirks with this sort of thing. How do you trick the FADEC and cause a compressor stall?
RH: Dirty compressor
3WE: Never read about routine compressor washings or problems of dirty compressors. How do you get a compressor dirty? It's hard to belive that compressor blades would accumulate anything from normal levels of atmospheric dust. And modern engines seem to smoke so little, I can't imagine some sort of freak, smoky backwards flow from the combustion chambers with the engine shut down.......
RH: Wind shear across the intake
3WE: Again, you are zooming along at 200 kts, how do you get a goofy, crooked airflow that goes Y2K and stalls the compressor? Old engines and
slow speeds and reverse thrust were a formula, but to just stall out when you are fat dumb and happy with a 200 kt wind blowing right up the intake- even if it gets ever-so-slightly off center????? Does this really happen from time to time with modern jet aircraft in normal flight???...or even in a 160 kt "full climb?"
Not trying to pick at your comments, but am asking that if this should be pretty incredibly rare, and what and how often would something like this happen.
Commercial Pilot, Vandelay Industries, Inc., Plant Nutrient Division.