Tonight's Dumb Idea...

[EHaury at aol.com]

Lance

The auto folks spend a lot of time trying to isolate (rather smooth) engines 
so that our vehicles are pleasant to operate. The fewer the cylinders, the 
larger the task. A few years ago I was intrigued by a mount design that consisted 
of an elastomeric material with enclosed chambers of different sizes that 
were fluid filled and connected by passages that were sized so that the fluid 
failed to flow (transfer) at certain frequencies. This allowed them to tune the 
mount for a range of conditions. Somewhat similar to shock absorber technology 
and possibly applicable toward providing variable dampening to the YS type 
mount.

I've wondered if the stretching of the elastomer at high throttle changes the 
characteristic of the Hyde type mount beneficially. Allowing for some 
frequency dampening variability over the operating range.

Certainly resonance issues with mechanical systems are often very complex. 
Amazing how well we've gotten our airplanes to work by trial and error.

Earl
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