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Date: Wed, 22 Jul 2009 21:38:27 -0700
Message-ID: <1c23473f0907222138y778c6a5bu5e3e8b23b809e614@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Water spray supplimental cooling
From: David Leonard <wdleonard@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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Dennis, just let me know and I will send a couple of pumps.  but the more I
think about it, the less I think they will be what you want..  no idea what
pressure they produce, but at least 30 is a good bet.  also at least they
are free and very light weight and if (when) they fail it wont be the end of
the world.

Dave leonard

On Wed, Jul 22, 2009 at 12:07 PM, Dennis Haverlah
<clouduster@austin.rr.com>wrote:

> I'm still contemplating installing a water spray for use during high power
> climb-out. I used Ed's cooling spread sheet and estimated I need about 200
> Btu/minute additional oil cooling during climb..  I also calculated that 5
> qts of oil need about 288 Btu to gain 40 deg. F during the first 2 minutes
> of take-off and climb  This translates to about 150 Btu/ minute.  I believe
> I need about 200 Btu/minute additional cooling to keep my oil cool on a 100
> + deg. day.
> The Latent Heat of Evaporation for water is 970 Btu/# or 8050 Btu/gal.  For
> a 10 minute climb I'd need 200 Btu X 10 or 2000 Btu.  This is approximately
>  1 Qt or 32 oz/10 minutes.  My water flow rate would than be 3.2 oz/minute.
>
> I found some "misting" spray nozzles at Home Depot and found they work well
> at 30 psi.  I have a 12 V Schure RV water pump that can be used for initial
> testing.
>
> Next week the afternoon temperatures will be above 100 deg again.  I hope
> to get the water mister installed so I can try it.
>
> If the medical water pumps David Leonard has will provide 30 psi or more
> I'd be interested in trying them.
>
> Dennis Haverlah
>
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>



-- 
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net

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<div>Dennis, just let me know and I will send a couple of pumps.=A0 but the=
 more I think about it, the less I think they will be what you want..=A0 no=
 idea what pressure they produce, but at least 30 is a good bet.=A0=A0also =
at least they are free and very light weight and if (when) they fail it won=
t be the end of the world.</div>

<div>=A0</div>
<div>Dave leonard<br><br></div>
<div class=3D"gmail_quote">On Wed, Jul 22, 2009 at 12:07 PM, Dennis Haverla=
h <span dir=3D"ltr">&lt;<a href=3D"mailto:clouduster@austin.rr.com">cloudus=
ter@austin.rr.com</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">I&#39;m still contemplating inst=
alling a water spray for use during high power climb-out. I used Ed&#39;s c=
ooling spread sheet and estimated I need about 200 Btu/minute additional oi=
l cooling during climb.. =A0I also calculated that 5 qts of oil need about =
288 Btu to gain 40 deg. F during the first 2 minutes of take-off and climb =
=A0This translates to about 150 Btu/ minute. =A0I believe I need about 200 =
Btu/minute additional cooling to keep my oil cool on a 100 + deg. day.<br>
The Latent Heat of Evaporation for water is 970 Btu/# or 8050 Btu/gal. =A0F=
or a 10 minute climb I&#39;d need 200 Btu X 10 or 2000 Btu. =A0This is appr=
oximately =A01 Qt or 32 oz/10 minutes. =A0My water flow rate would than be =
3.2 oz/minute.<br>
<br>I found some &quot;misting&quot; spray nozzles at Home Depot and found =
they work well at 30 psi. =A0I have a 12 V Schure RV water pump that can be=
 used for initial testing.<br><br>Next week the afternoon temperatures will=
 be above 100 deg again. =A0I hope to get the water mister installed so I c=
an try it.<br>
<br>If the medical water pumps David Leonard has will provide 30 psi or mor=
e I&#39;d be interested in trying them.<br><br>Dennis Haverlah<br><font col=
or=3D"#888888"><br><br><br>--<br>Homepage: =A0<a href=3D"http://www.flyrota=
ry.com/" target=3D"_blank">http://www.flyrotary.com/</a><br>
Archive and UnSub: =A0 <a href=3D"http://mail.lancaironline.net:81/lists/fl=
yrotary/List.html" target=3D"_blank">http://mail.lancaironline.net:81/lists=
/flyrotary/List.html</a><br></font></blockquote></div><br><br clear=3D"all"=
>
<div></div><br>-- <br>David Leonard<br><br>Turbo Rotary RV-6 N4VY<br><a hre=
f=3D"http://N4VY.RotaryRoster.net">http://N4VY.RotaryRoster.net</a><br><a h=
ref=3D"http://RotaryRoster.net">http://RotaryRoster.net</a><br>

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