Engines
My physics has pretty much rusted away so can anyone help me with this, The frequent statement that the intakes accounted for approx 80% of the engine power when supersonic. I quite understand that the intake air has to be slowed to subsonic before it meets the first compressor disk but saying that the intake produces 80% of the power almost implies that you could turn off the fires and still have 80% power. Obviously that cant be right! and another thing I dont understand is how shock waves slow down the intake flow, so any help with that would be useful to me. Any aerodymicist/physicists out there?
Thanks and keep up the super remeniscences
rod