Running engine without a prop fitted

by MARK JACKSON in 912 / 914 Technical Questions 12 years ago

Hi All

I was asked the question today why you shouldn't run the engine without a prop fitted.

The only answer I could give is that it could very easily overspeed if revved.

Does anybody have any other reasons that could cause problems.

Mark

Re: Running engine without a prop fitted

by Roger Lee » 12 years ago

Roger Lee

128 5.28k 4.98k

Hi Mark,

That's pretty much it. It has no load and could easily run away with rpm and over speed before you could even blink.

Roger Lee
LSRM-A & Rotax Instructor & Rotax IRC
Tucson, AZ Ryan Airfield (KRYN)
520-349-7056 Cell

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Re: Running engine without a prop fitted

by John Otter » 12 years ago

John Otter

2 55 0

Mark, the prop is the equivalent of the flywheel. Without it the engine will not run smoothly and as Roger has said, can over rev.

John

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Re: Running engine without a prop fitted

by MARK JACKSON » 12 years ago

MARK JACKSON

12 332 11

Thanks for that, just as I thought. If you leave the throttle alone so it stays at tick over then there is no problem.

Cheers Mark

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Running engine without a prop fitted

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