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From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "'Rotary motors in aircraft'" <flyrotary@lancaironline.net>
Subject: RE: [FlyRotary] Re: DAR
Date: Sat, 11 Jul 2009 07:01:20 -0400
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Dennis, You are likely correct.  The "curse" of making more power is you
have more heat to get rid of - but, that's one of the better "curses" {:>).
I also use an Rx-7 20" x4" x21/2" oil cooler. 

 However, things do get a bit hotter where you are at.  Water spray can
certainly remove considerably more heat with the phase transition from
liquid to vapor and works very well.  The downside, is of course, you have
to carry extra water.

One thing you might re-examine is how well you feel your air flow is into
and out of your oil cooler.  Is the duct well sealed against leaks, do you
have a high pressure area in back of your core outlet?, etc. I have read
that on an  that a 1 square inch opening permitting air to escape can lower
cooling by 20%.  Don't know how Accurate that figure is, but again worth
checking.

Ed

Ed Anderson

Rv-6A N494BW Rotary Powered

Matthews, NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On
Behalf Of Dennis Haverlah
Sent: Friday, July 10, 2009 10:54 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: DAR

Amen to that Mark!!  A real "hairy - chested" rotary man that shares 
what he knows so we can fly safer.
Thanks for all the support and knowledge  Ed.

Dennis H.

Just a note on my new intake for my Renesis -   I have flown a little 
and have found that my oil and water
 are running hotter this summer.  I believe that is due to me making 
more power with the new intake.

Bobby Hughes is encouraging me to add a water spray  system on  the oil 
cooler.   I am using an RX-7 oil cooler and
have to throttle back in climb to keep the oil below 220 deg. F.  -- 
does anyone have any experience and /or system
design they could share?

Thanks,

Dennis Haverlah

Mark Steitle wrote:

> Well said Ed.  And don't forget to include yourself in the group of 
> "hairy-chested heroes".  Heck, you've proven that a rotary can fly for 
> miles even when the engine isn't running.  ;-) 
>  
> Mark S.
>
>

--
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