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Cowl Air Temperatures

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olechap(at)comcast.net
Guest

Posted: Thu Jun 07, 2007 7:20 pm Post subject: Cowl Air Temperatures

Out of curiosity,  does anyone have an estimate (or maybe actuals) of max expected  temperatures in the aft cavity portion of the cowl just forward of the firewall  but behind the engine cooling baffles?  (RV6/7 IO360 or equiv  assuming no fire, obviously)

  

 Also,  when would the worst temperatures occur, both during flight and  on the ground?  My guess is T/O or max power slow climb would be the most  challenging design condition ... but I'm not sure, does soakback  after shutdown come close?  Any input is  appreciated.

  

 -Andy

 RV-7

   [quote][b]

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dale1rv6(at)comcast.net
Guest

Posted: Fri Jun 08, 2007 4:09 am Post subject: Cowl Air Temperatures

I have a digital temp sensor mounted 2 inches below the lower spark plug (cyl #3) on a typical flight with OAT at 60 this reads 174. The CHTs at the same time are 360 plus or minus about 5. The highest reading I have seen so far was 180. The hottest cowl temp will be found shortly after you shut down.   

Dale  

         

  

From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Andrew Olech

 Sent: Thursday, June 07, 2007 11:20 PM

 To: rv-list(at)matronics.com

 Subject: Cowl Air Temperatures  

  

     

Out of curiosity, does anyone have an estimate (or maybe actuals) of max expected temperatures in the aft cavity portion of the cowl just forward of the firewall but behind the engine cooling baffles?  (RV6/7 IO360 or equiv assuming no fire, obviously)  

    

   

    

Also, when would the worst temperatures occur, both during flight and on the ground?  My guess is T/O or max power slow climb would be the most challenging design condition ... but I'm not sure, does soakback after shutdown come close?  Any input is appreciated.  

    

   

    

-Andy  

    

RV-7  

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        [quote][b]

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