OK, is that why they paint the tops of school buses white? I've always
wondered about that.
-----Original Message-----
From: AF <af-boun...@af.afmug.com> On Behalf Of Robert Andrews
Sent: Thursday, August 15, 2019 6:55 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] Solar load
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-o
>> n-DDB-Enclosures.pdf>
>>
>> --
>>
>> Lewis Bergman
>>
>> 325-439-0533 Cell
>>
>>
>>
>>
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>>
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