Got to sell their product!!

 

But I think he does not know what he talks about when he is talking!!

What are planetaries doing in Auto-transmissions?

I believe BELL had it all wrong in the B-47 transmission, too.

And Mistral is just another fool trying!!

Don't even get started with Tracy's or Ross' (the old units ....)

 

Also chaindrives are just fine, but heavy - self-dampening too)

BUT, what do I know!!

 

TJ

 

On 7/28/07, Marc Wiese <cardmarc@charter.net> wrote:

All,
http://www.geareddrives.com/Buds_philosophy.htm
Has a nice write up in the last Contact mag. I like the features of his
psru----cs, separate lube, offset shaft.
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


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