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

phelan · 05-31-2011, 07:04 PM

Quote:

Originally Posted by jtsmith1

No, I work in the aerospace industry and I am a mechanical engineer, haha. I work on a team that designs jet engines, I do mostly mechanical/air flow stuff. Newly graduated though, so Im still wet behing the ears. Worked on airplanes such as the F-16 and the KC-135 for the past 8+ years though.

So you're a compressible fluids engineer? Do you use ANSYS for CFD analysis?

And yes, there are multiple reports that a lighter flywheel increases vibration in the crankshaft. That much should be obvious. While it is tempting to consider the easy "oh just make the flywheel" heavier, however, don't forget that a dampener does exactly that - it DAMPENS the response. The full magnitude of the force still must be transmitted, but now it's over a greater time T. So basically...all of the responsiveness of the engine is now thrown out the window.

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