<VV> White pushrod tubes

[Roger Gault]

Yeah, right.
Put your hand down 1/4" away from that 1000 degree F exhaust tube and see
how you like that zero radiant heat.
I will, however, grant you that it's not likely to be the dominant source.
But, it might not be insignificant.

Roger Gault
Austin (where we need more heat these days)


----- Original Message ----- 
From: "N. Joseph Potts" <pottsf@msn.com>
To: "Dave Morris" <BigD@davemorris.com>; "Corvair List"
<virtualvairs@skiblack.com>
Sent: Friday, February 04, 2005 4:15 PM
Subject: RE: <VV> White pushrod tubes


> Dave -
>      White reflects RADIANT heat. Pushrod tubes are subject to CONDUCTIVE
> heat (from the heads) and CONVECTIVE heat (from the cooling airstream).
> White will shed all the RADIANT heat they are exposed to, which is zero.
And
> yes, black will ABSORB all that radiant heat (still zero). No effect on
> conductive or convective heat.
>
> Joe Potts
> Miami, Florida USA (plenty of all kinds of heat here)
> 1966 Corsa coupe 140hp 4-speed with A/C
>
> -----Original Message-----
> From: virtualvairs-admin@corvair.org
> [mailto:virtualvairs-admin@corvair.org]On Behalf Of Dave Morris
> Sent: Friday, February 04, 2005 3:29 PM
> To: virtualVairs@corvair.org
> Subject: Re: <VV> White pushrod tubes
>
> I'm sure NASA will be pleased to hear that they can change the colors they
> have been using.  And I'm sure all of us who are building aircraft that
> have to be painted white so they don't overheat will be pleased to hear we
> can now paint our airplanes a different color.
>
> On the other hand, I'll bet I can come up with a ton of references in the
> next 2 minutes that say white reflects heat better than any other
> color.  I'll bet anybody who knows how to use Google can too.  To wit:
>
> "On a 90 degrees F / 32.2 C clear sunny, day in Austin Texas, a white roof
> had a temperature of 110 degrees F / 43.3 C, an aluminum coated roof, 140
> degrees F / 60 C, while a black, single ply roof, a temperature of almost
> 190 degrees F / 87.8 C (yes, one hundred and ninety degrees Fahrenheit,
> eighty seven plus degrees Celsius). "
>
> etc. etc. etc. etc.
>
> Dave Morris
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