Rotax RPMs

On Nov 29, 3:47 pm, (Paul Tomblin) wrote:
In a previous article, said:

A quick Google search yielded this info on the engine used in the
Remos:

http://www.rotaxservice.com/rotax_en...ax_912ULSs.htm

Ok, I'm a little embarassed that I couldn't find that info myself.

Is a reduction gearbox seen as a reliability problem, or isn't that such a
big deal any more?

--
Paul Tomblin http://blog.xcski.com/
"Oh my G'Quan, they killed Koshi!" - Citizen G'kyle, Babylon Park

I don't think anyone really knows the reliability of this engine and
gearbox. It hasn't been in service long enough. I have been training
behind one in a Flight Design CT, and it is not a noisy engine at
all. When I watch a CT take off I am really struck by how quiet the
airplane is. Also the engine has altitude-compensating carbs, so
there is no mixture to mess with. In flight the engine is very
responsive and smooth. I know a lot of people are put off by the high
rpms, but if the engine is designed to run at those speeds I am not
sure that is really a problem.

My one comment on the gearbox is it has a harmonic resonance vibration
at about 1800-1900 rpm (taxi speeds) which is very noticeable. I try
to avoid that, and bump it up to about 2000, and it's nice and smooth
there.

Phil