From: "Neil Unger 12348ung@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: Oil cooler thermostat
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
References: <list-11288140@logan.com>
Message-ID: <eb6cf54b-063d-691f-da98-e3436c096ad2@gmail.com>
Date: Fri, 22 Jun 2018 13:51:30 +1000
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Andrew,  Try "power with racing" (PWR) in Brisbane who specialise in 
rads.  Dear but good,  Neil.


On 6/22/2018 12:31 PM, Andrew Martin andrew@martinag.com.au wrote:
> Ok, I am in just a bit warmer climate than you, winter solstice 
> yesterday and its a sunny 22c today.
> I can not see any reason to have an oil thermostat, at least here in 
> Australia, with stock 20b cooler I could only use about 50% power 
> before cooking the oil with a 13b.
> Can't really comment about flying with cold oil. I would count that as 
> a total victory if ever in that situation.
> Aftermarket remote oil thermostats are available if you need one in 
> the system.
> I tried a 75mm thick aircond condenser as I had a couple of new ones 
> that were originally going to be used for coolant, better but not good 
> enough. still seeing 235-240f on partial throttle takeoffs, 175f on 
> descent. no thermostat, but possibly too much internal restriction as 
> predicted by Steve B.
> This weekends project is to add more sensors before cooler just to 
> possibly confirm the inevitable need to purchase & import a fluidyne. 
> local cooler mfrs have been absolutely no help.
> Andrew.
>
>
>
>
> On Fri, Jun 22, 2018 at 8:59 AM, Todd Bartrim bartrim@gmail.com 
> <mailto:bartrim@gmail.com> <flyrotary@lancaironline.net 
> <mailto:flyrotary@lancaironline.net>> wrote:
>
>     Some (most?) Of you are using custom or at least aftermarket oil
>     coolers but I think there are a few like me that are using stock
>     oil coolers. How many have removed the thermostat and plugged the
>     bypass hole?
>     Do any of the non-stock coolers have a thermostat?
>     A Google search on the subject shows that on the RX7 forums it
>     seems to be generally accepted to leave it alone.
>       But for our use I'm less inclined to think we always need it and
>     it seems to be quite restrictive.
>       Of those flying without one in either stock or non-stock, how
>     many are flying in warm climates only? Anybody in cold? Jeff?
>       I'm just concerned about winter flying especially during a long
>     descent where it might cool excessively and then if I was required
>     to use sudden power for a missed approach, would that cold oil be
>     a problem?
>
>     Todd
>
>


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    <p>Andrew,  Try "power with racing" (PWR) in Brisbane who specialise
      in rads.  Dear but good,  Neil.<br>
    </p>
    <br>
    <div class="moz-cite-prefix">On 6/22/2018 12:31 PM, Andrew Martin
      <a class="moz-txt-link-abbreviated" href="mailto:andrew@martinag.com.au">andrew@martinag.com.au</a> wrote:<br>
    </div>
    <blockquote type="cite" cite="mid:list-11288140@logan.com">
      <div dir="ltr">
        <div>Ok, I am in just a bit warmer climate than you, winter
          solstice yesterday and its a sunny 22c today. <br>
        </div>
        <div>I can not see any reason to have an oil thermostat, at
          least here in Australia, with stock 20b cooler I could only
          use about 50% power before cooking the oil with a 13b. <br>
        </div>
        <div>Can't really comment about flying with cold oil. I would
          count that as a total victory if ever in that situation.<br>
        </div>
        <div>Aftermarket remote oil thermostats are available if you
          need one in the system.<br>
        </div>
        <div>I tried a 75mm thick aircond condenser as I had a couple of
          new ones that were originally going to be used for coolant,
          better but not good enough. still seeing 235-240f on partial
          throttle takeoffs, 175f on descent. no thermostat, but
          possibly too much internal restriction as predicted by Steve
          B.</div>
        <div>This weekends project is to add more sensors before cooler
          just to possibly confirm the inevitable need to purchase &amp;
          import a fluidyne. local cooler mfrs have been absolutely no
          help.<br>
        </div>
        <div class="gmail_extra">Andrew.<br>
          <div>
            <div class="gmail_signature"
              data-smartmail="gmail_signature">
              <div dir="ltr">
                <div><br>
                  <br>
                  <br>
                </div>
              </div>
            </div>
          </div>
          <br>
          <div class="gmail_quote">On Fri, Jun 22, 2018 at 8:59 AM, Todd
            Bartrim <a href="mailto:bartrim@gmail.com"
              moz-do-not-send="true">bartrim@gmail.com</a> <span
              dir="ltr">&lt;<a href="mailto:flyrotary@lancaironline.net"
                target="_blank" moz-do-not-send="true">flyrotary@lancaironline.net</a>&gt;</span>
            wrote:<br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">Some
              (most?) Of you are using custom or at least aftermarket
              oil coolers but I think there are a few like me that are
              using stock oil coolers. How many have removed the
              thermostat and plugged the bypass hole?
              <div>Do any of the non-stock coolers have a thermostat? </div>
              <div>A Google search on the subject shows that on the RX7
                forums it seems to be generally accepted to leave it
                alone.</div>
              <div>  But for our use I'm less inclined to think we
                always need it and it seems to be quite restrictive. </div>
              <div>  Of those flying without one in either stock or
                non-stock, how many are flying in warm climates only?
                Anybody in cold? Jeff? </div>
              <div>  I'm just concerned about winter flying especially
                during a long descent where it might cool excessively
                and then if I was required to use sudden power for a
                missed approach, would that cold oil be a problem? </div>
              <span class="HOEnZb"><font color="#888888">
                  <div><br>
                  </div>
                  <div>Todd </div>
                </font></span></blockquote>
          </div>
          <br>
        </div>
      </div>
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