Thoughts on Engine Sound at High RPM's (kinda long)

jtsmith1

Thats kind of like saying "Because I said so." Something (or a combination of things) is causing this.

I am not saying that resonance is an issues here, I understand that it is NOT the issue. I simply gave some background info on vibrations to help others understand the idea of how rpms (frequencies) can excite materials and mass systems, to help explain what I feel could be an reason for the sound/feel at high RPM's.

I understand the Safety Factor is not identical to 1 and that there is some "overengineering" to ensure there arent any issues (not like this is a fighter aircraft where weight is super critical). However, this is not beneficial for the company from a cost standpoint, so I imagine using a SF much higher than 1 is not a best practice they use often.

I am actually not very familiar with MATLAB, never really used it much, but I would be interested in seeing something showing how an increase in flywheel mass effects the power output.