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#11
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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 |
#12
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#13
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Sure glad I have a wooden airplane.
Dan |
#14
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#15
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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! :-^ |
#16
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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 |
#17
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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 |
#18
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"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. |
#19
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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 |
#20
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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. |
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