Why most smart airplane owners want at least the top to be white!
On 08/15/2019 04:40 PM, Bill Prince wrote:
Burt Rutan did a study of his own back around 1985 or so, as his
fiberglass creations were all sensitive to heat (room temperature-cured
epoxy/fiberglass). There is no question that pure, unadulterated white
is the best "color" to prevent thermal gain from direct sun. All other
colors, cream, light yellow, even mirror experienced significant gains
above just plain white.
bp
<part15sbs{at}gmail{dot}com>
On 8/15/2019 4:31 PM, Ken Hohhof wrote:
The difference between standard machine grey and just bright white
spray paint from the hardware store is dramatic. I suspect everything
beyond that is incremental.
Also back around 2005 when I ordered my first outdoor cabinet from
DDB, I thought I wanted unpainted metal aluminum since all the traffic
control boxes I see are plain metal or stainless steel. The
salesperson said I absolutely didn’t want plain metal because it would
get hot in the sun and what I wanted was the cream color.
*From:*AF <af-boun...@af.afmug.com> *On Behalf Of *Bill Prince
*Sent:* Thursday, August 15, 2019 6:19 PM
*To:* af@af.afmug.com
*Subject:* Re: [AFMUG] Solar load
If you look up insulating paint on Wikipedia, the entry there says all
ceramic heat-reflective coatings are snake oil.
I did find a good discussion on Scientific American
(https://www.scientificamerican.com/article/benefits-of-insulating-paint/).
They don't exactly describe it as snake oil, but they also suggest
that you not get your hopes up.
I suspect you can get your best results with a coat of reflective
white paint, and try to keep it clean.
bp
<part15sbs{at}gmail{dot}com>
On 8/15/2019 1:12 PM, ch...@wbmfg.com <mailto:ch...@wbmfg.com> wrote:
Be interesting to do a bake off between this and the plain
“satellite white” I use.
I have always found it interesting that highly reflective things
like polished aluminum, chrome and silver paint seem to be really
bad at reflecting heat/sun. But we have all grabbed a chrome
wrench that has been left in the hot summer sun and realized hot
much it absorbs. I am guessing what we see as reflective, Infra
Red sees as flat black.
*From:*Bill Prince
*Sent:*Thursday, August 15, 2019 1:46 PM
*To:*af@af.afmug.com <mailto:af@af.afmug.com>
*Subject:*Re: [AFMUG] Solar load
Which reminds me of this material that a friend clued me in on.
You can get this at Home Depot (for example). It is pricey; around
$250 per 5 gallon bucket, AND it needs a top coat of another
material at near the same price. However, for an advertised
reduction in temperature of over 60 degrees F, it may be worth a look.
https://superiorcoatingsolutions.com/super-therm/
bp
<part15sbs{at}gmail{dot}com>
On 8/15/2019 12:35 PM, Lewis Bergman wrote:
I remember Chuck doing a study on this same subject so I
thought there might be some interest.
Cabinet heat load
<https://www.ddbunlimited.org/wp-content/uploads/2019/08/Solar-Load-on-DDB-Enclosures.pdf>
--
Lewis Bergman
325-439-0533 Cell
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