Mailing List flyrotary@lancaironline.net Message #11302
From: Ed Anderson <eanderson@carolina.rr.com>
Subject: Re: [FlyRotary] Re: First engine run with Monster Prop
Date: Fri, 10 Sep 2004 19:53:16 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Thanks, Yvon
 
    I believe you are right,  It would certainly take more torque to turn the larger propeller.  The larger propeller is turning approx  31.5 revolutions per second, so it appears to be moving a lot of air.  Hopefully, we will see more acceleration and climb.
 
Ed
 
 
 
Ed Anderson
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
Sent: Friday, September 10, 2004 5:30 PM
Subject: [FlyRotary] Re: First engine run with Monster Prop

 
----- Message d'origine -----
Envoyé : 9 sept. 04 15:07
Objet : [FlyRotary] First engine run with Monster Prop
 
Temperatures were normal.  After extended runup the oil temps approached 190F and coolant temp got up to 210F this is what I would normally see.  Considering that the static rpm was the same as my old gearbox and prop, it likely I was producing the same HP and therefore would not expect major difference.  The larger prop did not seem to interfere with the cooling airflow - at least on the ground.
 
Considering the differences in diameter and pitch between your old and new propellers, I believe you were producing more torque at the propeller shaft since you were turniing the same engine rpm as of old.
Congratulations on those excellent results.
Yvon.
  
 
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