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From: "Marc Wiese" <cardmarc@charter.net>
To: "Flyrotary" <flyrotary@lancaironline.net>
Subject: Gear redrives.com
Date: Sat, 28 Jul 2007 09:50:34 -0500
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All,
http://www.geareddrives.com/Buds_philosophy.htm=20
Has a nice write up in the last Contact mag. I like the features of his
psru----cs, separate lube, offset shaft.=20
He says "Build the PSRU so that anyone would be feel good about taking =
their
grandchildren on a cross country flight. Safety being our first
consideration, we do not advocate the use of belts, chains or planetary
gears in something as important as a propeller drive. Belts break, =
chains
stretch, and planetary gears are simply not designed to operate at high
RPM's and under such a great load as they are under while in use in an
airplane. Planetary gears do well in situations that only require high =
RPM
for a very brief period of time, but are not designed to operate under
consistent and continuous use at high RPMs. This is a recipe for =
disaster in
our opinion. Spur gears, as we use in our PSRU, on the other hand, are
designed to safely operate at a high RPMs and under continuously use. We
chose to use what we know to be the most dependable and reliable =
technology
for this application because our objective was to do what makes sense in
terms of safety, reliability, and ease of maintenance. "
Erstwhile comments on the planetary? What do you think Mistral makes of
this? Of course his redrives are mostly made for V8's but I really like =
the
clutch feature as he implements it!
Marc Wiese