Mailing List flyrotary@lancaironline.net Message #48009
From: Dave <david.staten@gmail.com>
Subject: Re: [FlyRotary] Over reving your rotary
Date: Sun, 06 Sep 2009 17:51:23 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
With the prop on I doubt he's getting over 6500 rpm.

Good thing we had an expert there to keep chris out of trouble, eh? <g>


Lynn Hanover wrote:
  "Well, you know the problem with the rotary is......hot exhaust.....and you know about the apex seals, don't cha".  Do you really want to rev the engine up that much, your crank shaft may not be able to take it with a load  Also, that is not the best prop".  "Your engine should not be surging that way"   I do enjoy being told about rotaries.
 
He was right about the excessive RPM. Real racers turn up sprint racing side port engines barely over 10,000 RPM. My bridgeported engines shift at 9,600 RPM. Periphery port short race engines shift at 10,700 and long race peripherys  a more modest 10,300 RPM. The crazy drag racers do 12,000 RPM.
 
So you shoudn't rev yours very high.either. You might get it hot or hurt those pesky apex seals.
 
Lynn E. Hanover
Rotary engines since 1980.
 
http://www.youtube.com/watch?v=0BGGBU2Lpyo
 
Note the header color during the power runs.

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