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Engine Out 02/20/06

 
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EMAproducts(at)AOL.COM
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PostPosted: Tue Feb 21, 2006 9:21 am    Post subject: Engine Out 02/20/06 Reply with quote

Fellow Pilots, If a feathered propeller, non-rotating did not improve
performance of an aircraft over the prop windmilling, Why are feathering props on
all modern aircraft?? Why do they put them on Motogliders. The major
companies, Beech, Piper etc, don't spend thousands of $$ without a reason! Any
multi-engine instructor will positively state this fact.
You can improve the glide somewhat with a stopped prop if you can get it to
stop vertically, cuts down on the disturbed airflow over the wing. Several
companies are now making full feathering electric props for Rotax and other
engines if this is a concern for you, or you like to "soar"!
Elbie
EM aviation, LLC


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wingsdown(at)comcast.net
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PostPosted: Tue Feb 21, 2006 3:25 pm    Post subject: Engine Out 02/20/06 Reply with quote

Yep, if you don't stop it, its going to act as a brake. A significant
brake not just an air flow problem. Personal experience. Now a full
feather electric is good if you can get it there quick enough. Trouble
is motor gliders don't go full feather until they have plenty of
altitude. On the other hand we may need all the glide we can get and
need it right now at low altitude.

Rick

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DPREMGOOD(at)aol.com
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PostPosted: Tue Feb 21, 2006 7:15 pm    Post subject: Engine Out 02/20/06 Reply with quote

Elbie,

Maybe I missed something here too.

I do recall during my multi engine training that once the prop was feathered
and engine secured, the airplane did climb a lot better, and with less rudder
input. This was on a GA-7 Cougar some time ago.

Doug Remoundos


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