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kfackler(at)ameritech.net
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 Posted: Tue Dec 05, 2006 5:06 pm Post subject: 912 question |
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This question is about the behavior of the Rotax 912 ULS.
This is the engine that it's in the plane in which I took my checkride, not
my Kolb. I also have rented it some since then. I realize that every engine
design is unique but I've never seen any engine do this. When you kill the
mags to turn off the engine, it STOPS, thunk. No wind-down at all. It's
actually quite startling. The CFI with whom I trained said it was perfectly
natural for that engine.
How say you all? Does this sound like normal behavior?
-Ken Fackler
Kolb Mark II / A722KWF
Rochester MI
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John Williamson
Joined: 10 Jan 2006
Posts: 146
Location: Arlington, TX
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| Posted: Tue Dec 05, 2006 5:42 pm Post subject: Re: 912 question |
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Ken and All,
It is normal for the 912 ULS stop turning immediately. It is also normal to hear a small squeak at shutdown if it has the slipper clutch installed.
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_________________
John Williamson
Arlington, TX
Kolbra, 912ULS, 1640 hours
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John Hauck
Joined: 09 Jan 2006
Posts: 4639
Location: Titus, Alabama (hauck's holler)
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| Posted: Tue Dec 05, 2006 5:57 pm Post subject: 912 question |
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Hi Ken:
I'll echo what John W said. When you shut down a 912ULS, it stops,
right now. It has 10.5 to 1 compression ration running through a 2.43
to 1 gear box.
Sorta reminds me of shutting down my Dodge Cummins. The Cummins B6
has 16 or 17 to 1 compression ratio. On shut down it shakes hell
outta the whole truck.
Take care and stay warm,
john h
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_________________
John Hauck
MKIII/912ULS
hauck's holler
Titus, Alabama |
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