AviationBanter - View Single Post

**Jim Stewart** · July 24th 07, 06:59 PM posted to rec.aviation.piloting,rec.aviation.owning

Gig 601XL Builder wrote:
Larry Dighera wrote:
On Tue, 24 Jul 2007 13:28:00 +0000 (UTC),
wrote in
:

I applaud the Rotax design, although I agree that it's a bit
too high-strung for using in high-volume certified aircraft.
Thank you for your informative analysis of the differences between air
and liquid cooled aircraft engines, but I'm having a little difficulty
inferring your meaning in your sentence quoted above.

In your opinion, what causes you to characterize the Rotax 912 liquid
engine as being "too high-strung?" Is it a lack of design robustness;
is the Rotax engine more fragile than the Cont. O-200? Does it
require more frequent maintenance?

It runs at ~5800 rpm which is about 3000 rpm faster than the O-200.

It can run at 5800 rpm, but it depends on your
prop pitch. My CTSW never exceeds 5100-5200 on
full throttle climbout and cruises just wonderfully
at 90-95 knots and 4200 rpm or so.

I bought the plane because it can cruise for
6 hours at 120 knots, but it's so smooth and
quiet between 90-100 knots that that's where
I do most of my flying.