Thanks Eric,
The Stemme won't climb at 3,000 RPM and the manual says not to take off
until oil temperature is in the green. I take that advice to include
climb power.

Dan
5J

On 4/24/21 10:51 AM, Eric Greenwell wrote:
The engines used on most motorlgiders are intended to be used that way
when they were designed, and are not expected to have a 2000 hour TBO.
So, it is not a problem. Perhaps the Rotax turbo version must be treated
differently than the 912 I have on my Phoenix touring motorglider,
because the advice for it is use whatever power is required to avoid the
landing. That can be at moderate RPMs (3000, say) to warm it while
climbing slowly, then using full power when the oil is above 120F.

Eric

On 4/24/2021 8:09 AM, Dan Marotta wrote:
I'm amazed that other aux powered gliders can start at or below 1,000'
AGL and fly away without trashing their engines.Â* The 4-cylinder
turbocharged Rotax in the Stemme needs several minutes to warm up
before pushing it above idle.Â* That means that, in dead air, more than
a few thousand feet are needed for a save rather than a land out.
That's why I always have a *paved* runway within range so that I can
land and warm up the engine before motoring home.Â* Tell me again how
convenient that is?

My engine is for take off only on a soaring flight and for
repositioning the glider otherwise.Â* Ain't got no steenking trailer.

Dan
5J

On 4/23/21 6:39 PM, waremark wrote:
On Friday, 23 April 2021 at 15:36:48 UTC+1, jfitch wrote:
If what you said were true, the podium at nationals would be crowded
with MG pilots. How many MGs were represented on the podium (or even
the top 5) in the last several 18 meter nationals? (hint: none).

I'm amazed. In the 2019 UK 18m Nationals I believe that every one of
the 37 gliders entered had a motor.

I have started my motor I think 6 times in 20 years for a
retrieve. Every time it was 1500 ft AGL over a paved runway
marked on a sectional. The glider is too expensive to stuff into a
field and too heavy to carry out of it.

I'm amazed again and impressed. I'm sure you're a brilliant pilot and
I'm not. I start my engine for a retrieve several times a season,
generally raising the prop at 1,000 foot over a field. If I was over
a paved runway, and not conflicting with other traffic, I would
probably go lower with the intention of landing if I couldn't soar
and taking off again. I believe I am quite prudent compared to other
motorglider pilot friends.