Does it have to WHITE!!!

Big John wrote:
Fred

You forget about Henry Ford who said you can have a Model T in any
color as long as it's black.


I didn't forget. I'm not old enough to remember that in the first
place...


--

FF

wrote:

You could make an IR pass filter (daylight filter) from a piece of
exposed film negative. Put it in front of a black and white TV camera.
Then point it at your test subjects. The ones that are the brightest
are relecting the most IR and should be the coolest.


Or better yet. Get one of the 'security cameras' from Harbor Freight.
Most CCDs are really sensitive to IR, so much so that they have to
include a filter for it to get any sort of decent picture. The 'night
vision' security cameras are really cheap cameras without the IR filter.

So I've been told.

--
This is by far the hardest lesson about freedom. It goes against
instinct, and morality, to just sit back and watch people make
mistakes. We want to help them, which means control them and their
decisions, but in doing so we actually hurt them (and ourselves)."

Sure glad I have a wooden airplane.

Dan

On 27 Jun 2005 07:14:26 -0700, wrote:

Sure glad I have a wooden airplane.

....unless, of course, you're using epoxy to hold it together.....

Ron "Hot Sauce for Gander" Wanttaja

I was thinking the same thing, Ron, but most of the structural epoxy in
a wooden bird is not in direct sun (unlike composite wing skins), and
wood is a lousy heat conductor. Of course, you never have to worry
about ANY part of your airplane getting exposed to the sun, living as
you do in the PacNW! :-^

OT re honeybee vision: They can see UV, not IR.

"...their vision is not sensitive to the same range of colors as ours.
Theirs is insensitive to red but detects ultraviolet light which is
invisible to us."

http://koning.ecsu.ctstateu.edu/Plan...bees/bees.html

Greetings All,
I'm building a composite fuselage in South Texas, with out the aid of air
conditioning. Does anyone have some suggestions on getting the resin setup
time a little longer. I promote it for 85 degrees, I've tried a hotter
temperature but it doesn't set well. The temp in the garage is 95+. I've put
the resin container in a bucket of water and it helps a little.
I need to do a large piece and the only option I can see is scheduling
myself at 3am in the morning. It would be nicer if I could do it during the
day. Thanks for any help you guys can give.
david

"David Koehler" wrote in message
...
Greetings All,
I'm building a composite fuselage in South Texas, with out the aid of air
conditioning. Does anyone have some suggestions on getting the resin setup
time a little longer. I promote it for 85 degrees, I've tried a hotter
temperature but it doesn't set well. The temp in the garage is 95+. I've
put
the resin container in a bucket of water and it helps a little.
I need to do a large piece and the only option I can see is scheduling
myself at 3am in the morning. It would be nicer if I could do it during
the
day. Thanks for any help you guys can give.

I'd do the layups first thing in the morning, when it's the coolest part of
the day.

Would help if you told us what sort of resin ... sounds like a Vinyl Ester
if you are promoting it but which one and what are you promoting it with and
in what quantities ? Are you vacuum bagging or is it just a conventional
wet layup ?


"David Koehler" wrote in message
...
Greetings All,
I'm building a composite fuselage in South Texas, with out the aid of air
conditioning. Does anyone have some suggestions on getting the resin setup
time a little longer. I promote it for 85 degrees, I've tried a hotter
temperature but it doesn't set well. The temp in the garage is 95+. I've
put
the resin container in a bucket of water and it helps a little.
I need to do a large piece and the only option I can see is scheduling
myself at 3am in the morning. It would be nicer if I could do it during
the
day. Thanks for any help you guys can give.
david

Any really light, bright color should be fine, but white is definitely the
best for UV protection. Another question to ask yourself is if you'll be
keeping it in an enclosed hangar most of the time. If so, then it's almost a
non-issue.

MJC

"Richard Riley" wrote in message
news
On Wed, 22 Jun 2005 20:34:32 -0400, "firstflight"
wrote:

:I have a composite kit aircraft, and it is time to paint! But I just
hate
:the idea of painting it WHITE (like most all the others). I understand
that
:HEAT is a big factor in this decision, and that white attracts the least
:amount of heat which could disrupt the Epoxy over time. Since my plane
is
:held together with Epoxy, this seems like a valid concern.
:
:What do you think people? Does it have to be white?? Could one choose a
:light yellow, light gray, silver,etc....... and not be pushing the
envelop
:too much?
:
:I happen to live in a very cool part of North America, so I am not too
:worried about regular heat (like someone in Arizona might be).

In Southern California I know of EZ's that are yellow, and Dick
Rutan's in Mojave is light blue. There's a beautiful Berkut in
England that's silver.

So, yes, it can be done if you are very, very careful. But do be VERY
VERY careful. Paint a sample panel, put it out at noon on one of the
hottest days of the year. Find out how hot it gets, check that
against the epoxy you're using AND the foam core - blue styrofoam
swells up when it gets too hot. It's not a cumulative problem - 4
years at 140 degrees won't do anything bad. 30 minutes at 200 degrees
and your airplane will be scrap.