I can not figure out what this engine noise is. It comes and goes and happens at different RPM ranges. Kind of fluttering...like plastic in the air. It gets loud as I put more gas, but if I lower gas pedal enough or floor the gas pedal it goes away for a little bit. ...
may seat against a shoulder 102 to close this leg of the Y fitting to force all of the exhaust gas around through the vaporizerheater. When wide open, valve 99 seats against shoulder 11. To prevent fluttering and pounding on its seat, this valve is inertia damped by a comparatively heavy...
Among these, compressors are of particular interest because they can cause all sorts of operability problems, such as surges, stalls and fluttering [4], and they can significantly influence the overall performance of aero-engines. Unfortunately, a compressor map is unavailable to ordinary third-...