feathered propeller engine restart in air

by imran Ali in General Tech Discussion 12 years ago

plz comment on 914f engine restarts in air with propellers in feathered state
how it will effect the engine

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Re: feathered propeller engine restart in air

by Roger Lee » 12 years ago

Roger Lee

125 5.11k 4.52k

Hi Imran,

If you keep the pitch in and don't slow too much the windmill effect would most likely help a restart. I can shut my engine off in air and at 100 mph it will keep turning, just not as fast.

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

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Re: feathered propeller engine restart in air

by Rob Seaton » 12 years ago

Rob Seaton

3 1.32k 240

Starting an engine with the prop in feather puts a huge strain on the engine. Can you un-feather and then start? If not then it should be unfeathered ASAP.
Is this a 914F-3 with a un-feathering accumulator? or electric controller or??
Rob

Thank you said by: imran Ali

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Re: feathered propeller engine restart in air

by paul harrington » 12 years ago

paul harrington

3 9 0

I own and operate a Superximango, a motorglider and every one of my in air starts is fired up by shallow diving the aircraft to 85knots and bringing the prop pitch f4rom feather through course to fine manually.
I have had occassions when the engine tried to start in full feather, but I stopped this immediately rather than put a high stress on the engine. I believe it would have started in full feather if I had allowed this to happen.

Thank you said by: imran Ali

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Re: feathered propeller engine restart in air

by imran Ali » 12 years ago

imran Ali

1 2 0

surely it will put stress on engine but what in case of overload clutch installed as 914f2

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Re: feathered propeller engine restart in air

by Rob Seaton » 12 years ago

Rob Seaton

3 1.32k 240

The overload clutch will not do anything in this case. It is to protect the crank in case of a propstrike. Totally different type of event.
Rob

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feathered propeller engine restart in air

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