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		kfackler(at)ameritech.net Guest
 
 
 
 
 
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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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