No subject

Tue Jul 3 16:57:57 CDT 2007

bottom scoop look anything like the one on top? (I'm talking about the photo
you attached titled "Exit fairing-jpg). I assume this "hood" is to help the
hot air to get out. Good luck as you continue to invent, and thanks for
keeping me informed.

All the best,
Dennis

On 6/30/07, Al Gietzen <ALVentures at cox.net> wrote:
>
>  Ditto me on the congrats! Now you can stop in and see us again in Utah on
> your way to Idaho. I really want to see your bird with the cooling vents
> in the wing roots.
>
> Hopefully I'm not too far behind you. If you posted your flight testing
> experiences on the reflector, plus any squawks that you learned from, I
> missed it. Assuming I missed it, any chance you can post this again?
>
>
>
> Dennis;
>
>
>
> I have found that the wing root installation hasn't lived up to my
> expectations.  I initially had limited cooling by either the oil cooler in
> one wing, or the coolant radiator in the other.  This was without much of a
> scoop under the wing.  I added a scoop to the oil cooler inlet, and that
> improved things enough to allow me to continue flying.  Fortunately the
> in-cowl radiator, with its sort of P-51 style armpit scoop, handles the
> coolant heat load just fine, so it that hasn't been an issue.
>
>
>
> Now with the warm summer temps I am finding the oil temps getting higher
> than I'd like in a sustained climb, so I am currently setting up to do some
> measurements of pressure differentials; and considering ideas for improving
> air flow.  My temperature measurements make it clear that the issue is air
> flow, not oil flow.  It may just be my exit fairing design (see photo), but
> based on my experience and evaluations, and that of an EZ pilot who also
> tried a wing root oil cooler, it seems there may not be low pressure at the
> upper surface in that position.  Of course, we pursued this approach based
> on Alan Shaw's experience of putting oil coolers in the wing root, which he
> said worked wonderfully; so who knows.
>
>
>
> I'll let you know what I figure out.
>
>
>
> Al
>
>
>
>
>
> _______________________________________________
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>
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>
>

-- 
All the best,
Dennis

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Al, Thanks for getting back. Sorry to hear that the wing root cooling isn&#39;t working as well as Shaw said it would. I have two radiators (engine coolant) one in each wing root, but no oil cooling system. Since I haven&#39;t flown yet, I can&#39;t comment on how it works. Based on an hour of prop testing, cooling seems to be working, but that&#39;s not the same as flying. 
 From your description, you put a scoop on the bottom inlet. Does the new bottom scoop look anything like the one on top? (I&#39;m talking about the photo you attached titled &quot;Exit fairing-jpg). I assume this &quot;hood&quot; is to help the hot air to get out. Good luck as you continue to invent, and thanks for keeping me informed. 
 All the best, Dennis <div>On 6/30/07, Al Gietzen &lt;<a href="mailto:ALVentures at cox.net">ALVentures at cox.net</a>&gt; wrote:<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

<div link="blue" vlink="blue" lang="EN-US">

<div>

Ditto me on the congrats! Now you can stop in and see
us again in Utah on your way to Idaho
. I really want to see your bird with the cooling
vents in the wing roots. 
 
Hopefully I&#39;m not too far behind you. If you posted your flight testing
experiences on the reflector, plus any squawks that you learned from, I missed
it. Assuming I missed it, any chance you can post this again?

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">Dennis;</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

I have found that the wing root installation
hasn't lived up to my expectations. &nbsp;I initially had limited cooling
by either the oil cooler in one wing, or the coolant radiator in the
other.&nbsp; This was without much of a scoop under the wing.&nbsp; I added a
scoop to the oil cooler inlet, and that improved things enough to allow me to
continue flying. &nbsp;Fortunately the in-cowl radiator, with its sort of P-51
style armpit scoop, handles the coolant heat load just fine, so it that hasn't
been an issue.

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

Now with the warm summer temps I am
finding the oil temps getting higher than I'd like in a sustained climb,
so I am currently setting up to do some measurements of pressure differentials;
and considering ideas for improving air flow.&nbsp; My temperature measurements
make it clear that the issue is air flow, not oil flow. &nbsp;It may just be my
exit fairing design (see photo), but based on my experience and evaluations,
and that of an EZ pilot who also tried a wing root oil cooler, it seems there
may not be low pressure at the upper surface in that position. &nbsp;Of course,
we pursued this approach based on Alan Shaw's experience of putting oil
coolers in the wing root, which he said worked wonderfully; so who knows.

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">I'll let you know what I figure
out.</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">Al</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

<p><font color="blue" face="Verdana" size="2"><span style="font-size: 11pt; font-family: Verdana; color: blue;">&nbsp;</span></font></p>

</div>

</div>

_______________________________________________ To change your email address, visit <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.tvbf.org/mailman/listinfo/reflector" target="_blank">http://www.tvbf.org/mailman/listinfo/reflector
</a> Visit the gallery! &nbsp;<a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.tvbf.org/gallery" target="_blank">www.tvbf.org/gallery</a> user:pw = tvbf:jamaicangoose Check new archives: 
<a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.tvbf.org/pipermail" target="_blank">www.tvbf.org/pipermail</a> Check old archives: <a onclick="return top.js.OpenExtLink(window,event,this)" href="http://www.tvbf.org/archives/velocity/maillist.html" target="_blank">
http://www.tvbf.org/archives/velocity/maillist.html</a> </blockquote></div> -- All the best, Dennis

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