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I'm not trying to compete with Tracy's unit, I'm
merely trying to provide something locally, cost effectively!
I would be happy to get down to Tracy's
PSRU weight. It's pretty hard to beat the weight of plain
bearings.
That's about as light as one could get with
gear drive, a chain or belt might be lighter.
Hi George,
I checked around, and couldn't do much better than
the RD-1C drive as far as weight goes. Even belt drives are heavy, so
there isn't necessarily any savings there. Fortunately, the Kolb can
handle the weight.
The lone exception could be Richard's Hirth Drive
idea. I'd be interested in knowing what the all up weight of that is
when you add the plate and shaft to attach it to the engine. Have you
added all that up Richard? My guess was that you could save about 10 lbs
over Tracy's drive, but it would require a bunch of custom work, which I'm not
necessarily capable of performing. The other unknown is how it will
survive with the strong power pulses of the full size single rotor.
By my figuring the one rotor with PSRU will be
about 280 to 300 lbs, may be a little less if your really stingy - I don't know
if I'd be too stingy with the oil though.
George ( down under)
You might want to check your kg to lbs conversion rates
again, mate. If you're just counting the engine, and PSRU, you could
probably save some weight by using a stock 13B and Tracy's drive
:-) You aren't making that PP adapter out of lead
are you :-)
FWIW, my estimate
is for a worst case weight of 230 lbs for the total engine installation using
stock housings. I'm pretty sure I can beat that weight on the Kolb,
but I haven't added everything up yet. If anyone ever gets an aluminum
front and rear housing to market, that will save about 25 lbs as
well.
Cheers,
Rusty (no idea what I'll use for a muffler on the
single)
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