My impression is it is well engineered for an internal spur gear drive.
It is also true that internal spur gear drives are heavier than a
planetary drive of the same torque capacity and cost more.
They also have an undesirable thrust line offset for most aircraft
installations. They lower the engine relative to the thrust line taking
up valuable room needed for a cooling radiator. I don't see the advantage.
Why bother?

Peter Cowan/Lexi Cameron wrote:

1: 2.4 reduction. Some slow planes need big props
2: Same rotation as other aircraft engines so more access to props
3: Offset shaft also gives more room for the longer prop mentioned above
4: Weight and price differences are not a significant percentage.
5: Made in CANADA.

Don't get me wrong. I like and respect Tracy and his drive and would buy one
in a minute but for these factors.
Peter.

I normally lurk here but this is too much.

Shame on you Paul for publishing this. What strikes me here is the parallel
between what Peter Cowan/Lexi Cameron wrote here and the advantage the
terrorist took while using our freedoms in this country against us. Peter
Cowan/Lexi Cameron is not only benefiting from the information greatly
but he is also using your free newsletter to spout this anti-American
crap. Perhaps he does not realize that there is a huge trade
deficit with Canada and in favor of Canada. It is a good thing that
all Americans don't feel about buying American like he feels about
buying Canadian or the Canadians would starve. If any of you Americans
are considering buying one of these Canadian Marcotte drives so Peter Cowan/Lexi
Cameron can save 10% and support Canada I would reconsider.

George Sherman

 
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