Jim Stewart wrote in
:

Phil wrote:
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.

I'd like to get some more information on this.
The Rotax 912 has been in production since
around 1992 and the 912ULS since 1999. Should
be information somewhere.

I've heard that thousands of them have been
sold for drones and unmanned aircraft of various
types.


There's been quite a lot of them on certified airplanes in Europe as
well as thousands on homebuilts round the world for quite some time.

It's pretty easy to check how well they work in the real world. Look for
airplanes for sale with the engine installed. If most of the airplanes
with around 1,000 hours on them have engines with about 500 hours on
them, well, you have your answer. But afaik, they work well and last a
long time.

Bertie