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Date: Fri, 07 Sep 2012 10:32:29 -0400
From: Ernest Chrisltey <echristley@att.net>
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To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: Single lever control...and effective cooling!!!
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WARNING:  Reading this graph, keep in mind that the MAP is measured in 
kPa.  It's that whole "metric" thing that the MegaSquirt uses.  Either 
mentally look at it as a percentage of ambient air pressure, or divide 
it by 3 to get close to what Hg" would be.  Not exact, but definitely be 
aware that I'm not running 70lbs of boost 8*)


On 09/07/2012 10:21 AM, Ernest Chrisltey wrote:
> On 09/06/2012 10:12 PM, Cedric Gould wrote:
>> I think I'd be more interested in seeing these two plots with 
>> manifold pressure, rather than throttle position, plotted (same data).
>>
> Here ya' go. The first is the same data set.  The second is the data 
> set from a couple hours ago.  If you'd like to see more than you'll 
> know what to do with, download MegaLogViewer (it's free), and I'll 
> send you my log and configuration files.
>
> More good news.  With an ambient temperature of 79*, I've found the 
> point where my coolant temps max out.  Before, the temps just kept 
> climbing and climbing.  Today, if I held between 2500 and 3000 RPM, 
> the temps would slowly start backing down from 205*. At idle 
> (~1300RPM), the temps would start inching up again.  My oil temps 
> maxed out at 203*, and slowly started backing down off that at idle.
>
> I surmise that there just isn't enough airflow through the oil and 
> water cooler with the prop spinning that slowly.  Both are located 
> about 8ft behind the prop.  I would expect to get much better numbers 
> if the plane were actually moving.  I'm going to test it out by 
> attaching a leaf blower to the exit of one water coolers this 
> evening.  I've measured the exit velocity of the air from the blower's 
> 3" exit at 45mph.  If that, working on only half the radiator 
> capacity, keeps the temps under 200*, then I think I can feel safe 
> that it will cool on takeoff (minimum of 60mph).
>
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html


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    <div class="moz-cite-prefix">WARNING:&nbsp; Reading this graph, keep in
      mind that the MAP is measured in kPa.&nbsp; It's that whole "metric"
      thing that the MegaSquirt uses.&nbsp; Either mentally look at it as a
      percentage of ambient air pressure, or divide it by 3 to get close
      to what Hg" would be.&nbsp; Not exact, but definitely be aware that I'm
      not running 70lbs of boost 8*)<br>
      <br>
      <br>
      On 09/07/2012 10:21 AM, Ernest Chrisltey wrote:<br>
    </div>
    <blockquote cite="mid:list-5749144@logan.com" type="cite">On
      09/06/2012 10:12 PM, Cedric Gould wrote:
      <br>
      <blockquote type="cite">I think I'd be more interested in seeing
        these two plots with manifold pressure, rather than throttle
        position, plotted (same data).
        <br>
        <br>
      </blockquote>
      Here ya' go. The first is the same data set.&nbsp; The second is the
      data set from a couple hours ago.&nbsp; If you'd like to see more than
      you'll know what to do with, download MegaLogViewer (it's free),
      and I'll send you my log and configuration files.
      <br>
      <br>
      More good news.&nbsp; With an ambient temperature of 79*, I've found
      the point where my coolant temps max out.&nbsp; Before, the temps just
      kept climbing and climbing.&nbsp; Today, if I held between 2500 and
      3000 RPM, the temps would slowly start backing down from 205*. At
      idle (~1300RPM), the temps would start inching up again.&nbsp; My oil
      temps maxed out at 203*, and slowly started backing down off that
      at idle.
      <br>
      <br>
      I surmise that there just isn't enough airflow through the oil and
      water cooler with the prop spinning that slowly.&nbsp; Both are located
      about 8ft behind the prop.&nbsp; I would expect to get much better
      numbers if the plane were actually moving.&nbsp; I'm going to test it
      out by attaching a leaf blower to the exit of one water coolers
      this evening.&nbsp; I've measured the exit velocity of the air from the
      blower's 3" exit at 45mph.&nbsp; If that, working on only half the
      radiator capacity, keeps the temps under 200*, then I think I can
      feel safe that it will cool on takeoff (minimum of 60mph).
      <br>
      <br>
      <br>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">--
Homepage:  <a class="moz-txt-link-freetext" href="http://www.flyrotary.com/">http://www.flyrotary.com/</a>
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