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Message
let
me throw something in here on the dampener. Tracy's dampener is not built
to take up a lot of torque vibration at low rpm. What we need on the single is
having the soft elements closer to the center line of the e-shaft, allowing more
movement in them, eg. having a softer coupling = lower resonant frequency, and
at the same time utilizing some of the dampening characteristics inherrent in
the rubber. The closest to that requrement I could come up with, is the do-nut
shaped coupler used on Rotax and Hirth engines. They are also available in
different Shore values. I have not found a US source yet.
Hi
Richard,
Excellent comments.
Thanks. This fits perfectly with the mental image I have of the
problem. I can't wait to hear more about how your Hirth drive
behaves. If it works well, then it's a slam dunk, since it's cheap, light,
and available.
There are some interesting possibilities
on this page as well- http://www.airtrikes.net/engines.shtml
I know someone who has one of his gear drives on a geo engine, but emails to the
guy who makes the drive have gone unanswered.
I'll keep an eye out for
something to appear over the rest of this year, and get more serious
about finding or making something if that doesn't happen. I haven't
completely ruled out ducted fan either.
Thanks,
Rusty
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