Mailing List flyrotary@lancaironline.net Message #12670
From: Russell Duffy <13brv3@bellsouth.net>
Subject: RE: [FlyRotary] Re: EWP
Date: Sun, 7 Nov 2004 18:09:56 -0600
To: 'Rotary motors in aircraft' <flyrotary@lancaironline.net>
Message
Rusty I don't see, how more cooling flow at low rpm will cool better, there is still no change in radiator-size/airflow/etc. 
 
It's pretty well established that more flow equals better cooling.  I'm not qualified to explain it, but plenty of people here are, and you can probably find ton's of info in the archives.  
 
 no cavitation at high rpm: use underdrive pulleys 
 
And make the low rpm overheating worse.
 
 and maintain the belts in correct alignmentand tension and you will never loose one..........:) 
 
I'd be more or less willing to agree with this.  If I had a factory set of pulleys, accessory mounts, and adjustment arms, I wouldn't be as worried.  Unfortunately, many of us are forced to make our own accessory mounts.  I've even had to use a pulley that needed to be modified to fit the shaft on my alternator.  The chances of a failure with these added variables is far more likely than stock, and as I mentioned, broken or thrown belts have stranded me on two occasions, both in factory applications.   
 
 (I have abour 5000 hrs flying time in front of belts double-v-typ as the only means of powertransfer from the engine to the rotor....) 
 
How much do you think Robinson spent developing that v-belt drive?  It had better work :-)  
 
Cheers,
Rusty (I hate belts, and they hate me) 
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