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Message
I'm all for agreeing to
disagree, as well you know, but I'm still looking at making the damper harder,
rather than softer as in the 2 rotor.
Hi
George,
The way I understand
it, there's always a resonant frequency, and not just because we're talking
about single rotors. Two and three rotors have them too. You can
make the coupling loose/soft, to lower the frequency, or tight/hard to raise the
frequency. Either will work just fine, as long as you get the
frequency outside of your operating
range.
Unless you can be SURE your
resonant frequency is well outside your operating range, it's much safer to go
with the lower frequency approach. Consider the amount of energy that's
available at 2000 rpm vs 8000. At 2000, the drive rattles, and at 8000,
the drive breaks. Didn't Everett Hatch break a number of drives this
way?
Again, I'm not a mechanical
engineer, so this may be totally wrong, but it's the way I "understand"
it. My fear of a harder damper is that it might look great up
to the static rpm I can run on the ground, but then fail catastrophically when
the prop is unloaded in flight. If I'm going to break something, I'd
rather it be at idle :-)
A man of your means may
wish to opt for the aluminium end housings,
When I can order a set of
"in-stock" aluminum housings online, without having them custom made, I'll be
real interested. The parts I have will work just fine for
now.
Cheers,
Rusty
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