From: "Finn Lassen finn.lassen@verizon.net" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Evap cores and James Cowl
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-12960515@logan.com>
Message-ID: <9db3298d-4690-19d3-ff06-991127f282df@verizon.net>
Date: Mon, 16 Sep 2019 10:39:55 -0400
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Thank you Dennis.

Are you sure those are core dimensions and not overall dimensions?
Do you happen to have the model number of that radiator?

What did you do with the openings on either side of the spinner? Or is 
there a James cowl version with only a big opening under the spinner?

Finn

On 9/15/2019 7:35 PM, Dennis Haverlah clouduster@austin.rr.com wrote:
>
> Finn,
>
> Sorry for the late reply to your 9/7/19 post.
>
> I used a James cowl on my RV 7 A with a Renesis 4 port.???? My water 
> ??radiator was a Scirocco drag race radiator ??? core measures ??13 in 
> wide x 22 in long and 2.5 inch thick for 715 ??cubic inches.?? For the 
> oil I used a stock RX-7 oil cooler (2.0 inch thick) with the bypass 
> plugged.?? The radiators are mounted _side by side_ under the engine 
> motor mount.?? The aft end of ??the radiator assembly is against the 
> cowl bottom and the radiator assembly is bolted to the motor mount 
> structure at a 30 deg angle with the high end just above the James 
> cowl air ??inlet under the spinner.?? ??The air flows in under the 
> radiator assy. up through the rads and out at the firewall.
>
> I cut a small opening above the James cowl ??cooling air inlet to use 
> for engine combustion air.?? In the cowl under the radiator assembly I 
> built a pinched duct to try to distribute the airflow evenly through 
> the radiators. (Probably could improve it)???? If it is real hot when I 
> takeoff I reduce throttle as required to control my oil temp to not 
> exceed 220 F. My water temp is usually 10 deg cooler than the oil 
> temp.?? I have taken off fully loaded when the air temp. was 105 deg F. 
> and climbed at 20 inches manifold pressure to control temps.
>
> I have about 860 hours on the engine.?? The doner car had about 9,000 
> miles on it when it was wrecked. The engine has never had the rotor 
> assembly taken apart.?? Most of my flying now is 10 minute flights from 
> 40XS to GTU to play tennis 3 - 4 times a week.
>


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    <div class="moz-cite-prefix">Thank you Dennis.<br>
      <br>
      Are you sure those are core dimensions and not overall dimensions?<br>
      Do you happen to have the model number of that radiator?<br>
      <br>
      What did you do with the openings on either side of the spinner?
      Or is there a James cowl version with only a big opening under the
      spinner?<br>
      <br>
      Finn<br>
      <br>
      On 9/15/2019 7:35 PM, Dennis Haverlah <a class="moz-txt-link-abbreviated" href="mailto:clouduster@austin.rr.com">clouduster@austin.rr.com</a>
      wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-12960515@logan.com">
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        <p class="MsoNormal">Finn,</p>
        <p class="MsoNormal"><o:p>??</o:p></p>
        <p class="MsoNormal">Sorry for the late reply to your 9/7/19
          post.</p>
        <p class="MsoNormal"><o:p>??</o:p></p>
        <p class="MsoNormal"> I used a James cowl on my RV 7 A with a
          Renesis 4 port.???? My water ??radiator was a Scirocco drag race
          radiator ??? core measures ??13 in wide x 22 in long and 2.5 inch
          thick for 715 ??cubic inches.?? For the oil I used a stock RX-7
          oil cooler (2.0 inch thick) with the bypass plugged.?? The
          radiators are mounted <u>side by side</u> under the engine
          motor mount.?? The aft end of ??the radiator assembly is against
          the cowl bottom and the radiator assembly is bolted to the
          motor mount structure at a 30 deg angle with the high end just
          above the James cowl air ??inlet under the spinner.?? ??The air
          flows in under the radiator assy. up through the rads and out
          at the firewall.</p>
        <p class="MsoNormal"><o:p>??</o:p></p>
        <p class="MsoNormal"> I cut a small opening above the James cowl
          ??cooling air inlet to use for engine combustion air.?? In the
          cowl under the radiator assembly I built a pinched duct to try
          to distribute the airflow evenly through the radiators.
          (Probably could improve it)???? If it is real hot when I takeoff
          I reduce throttle as required to control my oil temp to not
          exceed 220 F. My water temp is usually 10 deg cooler than the
          oil temp.?? I have taken off fully loaded when the air temp.
          was 105 deg F. and climbed at 20 inches manifold pressure to
          control temps.?? </p>
        <p class="MsoNormal"><o:p>??</o:p></p>
        <p class="MsoNormal">I have about 860 hours on the engine.?? The
          doner car had about 9,000 miles on it when it was wrecked.??
          The engine has never had the rotor assembly taken apart.?? Most
          of my flying now is 10 minute flights from 40XS to GTU to play
          tennis 3 - 4 times a week.<o:p></o:p></p>
        <p class="MsoNormal"><o:p>??</o:p></p>
        <p class="MsoNormal"><o:p>??</o:p></p>
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