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Building Tips and technical articles. => 1/2 A building. => Topic started by: Larry Renger on November 02, 2012, 10:45:05 AM
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Don't forget to go grab a bunch of political signs after the election. I use them to build trainers and also have a folding takeoff strip made from the signs. Duct tape makes great hinges! Mike Alurac built a bullet-proof flying stop sign out of the stuff and it is sort of a 1/2A Uni-Slob.
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Oh yes the ACP-12 or "Alurac Corro Platter-12"... I'll post some pics this evening for all to see this easy to build truly indestructible 1/2 A flyer. 12" diam octagon built using an old political coroplast sign. Presently it has a Larry Renger prepped 049 black widow for power and powers this 7oz flyer around just fine. This fun flyer can be built in about 30 minutes from the first cut to lining-up control lines making it quick, easy and cheap to build. I'll list more details when I post pics. Thinking of suggesting a club junk yard wars of sorts using old political signs for all to build their own ACP! Now wouldn't that be some real good-time fun?!!!
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We wuz robbed! I went out this morning and all the plastic signs were GONE! The paper ones were still around. I guess someone wized up that the things could be sold to a recycler. Or there are going to be a LOT of ET-1 trainers out there! LL~
Andy Borgogna and I did find a locale that hadn't been stripped yet and scored enough for our needs.
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It seems that the coroplast signs were cleaned right up today in my area near the Fullerton airport. Picked-up about a dozen or so and went back with a bigger vehcile to get some very large 4 x 8"+/- sheets and they were all gone by the time I got back after work.
I was truely amazed that the signs were cleand-up so quickly; paper and plastic! Possibly lots of Larry Renger's ET-1's being built out there I'd like to think.
Mike
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Well I found a couple of 4' x 8' sheets today along with about a dozen 18 x 24 signs while en-route to a vendor meeting today in Huntington Beach along the Navel Weapons Station Ammo Dump perimeter fence. Seems that the city workers in that area have not been as quick to cleanup like they did over in Fullerton this week. Maybe they're leaving for the GI's to do? I've accumulated about 24, 18 x 24 signs and 2- 4x8 sheets since the elections ended. I think I'll get busy on an ET-1!!!
In the meantime here's a pic of the ACP-12. It's a very simple 12" diam octagon with a hot running Larry Renger prepped black widow mounted on a Renger/Brodak 1/2A nylon mount with the elevator simply cut by opening up a cell of the coroplast. Reinforced the engine mount area, spar and bell crank mount with bamboo shish kabob skewers and epoxy. Total build to fly time about 1 hour and cost <$10 excluding the engine. A tank mounted Norvel would be a real hoot! Now that's got me even thinking about a tee-dee on bladder pressure. A cigar tube for the bladder housing??? I'll add it to the wish list for now...
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I grabbed some here in Lancaster though the bigger 4x8's i hand to cut to get in my pathfinder.
I also got a dozen that are about 18"x24 or so.
There are still more here in the lancaster/palmdale area.
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I fit the 4 x 8's in my Camry and had to fold them strategically along the seams. One had short grain and the other had a long grain and was bit difficult to neatly fold to fit but I managed.
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Is there any glue that can be used on these signs? If so what kind?
T I A
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The trainers are assembled with hot melt glue. I have not tried anything else.
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Some place I saw someone said to use painter's choice.
Is that a spray paint ?
I also was looking on the web and somebody suggested using krylon paint for plastic.
Not sure if one needs to fill in the holes along the wings edges where you cut through any slots ?
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If you want to use Krylon on anything with an engine, I 'd suggest testing it for fuel resistance, first. In fact, one of my experiences with Krylon, I made upp some test patches on balsa frameworks, put raw fuel on them , and allowed to set for a couple days. Painted my Staerling F-4U-1 with the early 3 tone blue and gray. Got down from the first flight, and the Krylon had disolved where the exhaust hit it. It might have been fuel proof, but was definitely NOT hot fuel proof.
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It's a trainer. It only is supposed to fly straight and level. Aerodynamic refinements like filling all the little holes is totally unnesesary. It flys great as is. Totally outshines the PT-19 for its purpose.
(I still have a PT-19 of my own, and never plan to part with it!) ;D
Krylon would probably be just fine for the electric version, but not if you do a "wet" version. Painters Choice is the stuff to use where fuel is involved.
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The trainers are assembled with hot melt glue. I have not tried anything else.
I hope you don't have the same experience with hot melt as I did. I put a field box together with hot melt. The first time I used it after a day sitting in the sun I went to pick it up and it fell apart.
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please read my question slowly...
What exactly is painters choice ????? i've done a net search and best i get for an answers is like being told its a produce sold to professional painters ....
What exactly is it ?? a spray, paint House paint ???
Secdond part of my post was that I found some info where people i think was a spad post where they suggested using krylon for plastic.
For those that do not know spad is a forum called simple plastic airplane design.
I'm asking what and where does one find painters choice.
Not painters touch eith i guess.
i've tried searching the name and the links i have found do not help here...
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Painter's Choice is a rattle can spray paint that is readily available at the local hardware stores, at least here in So. Cal. Considering our restrictive environment, it should be available everywhere else. It is a lower cost product from the makers of Rust-O-Leum. It lacks the extra oils for rust protection, but works great for our use. It may be "Painers Choice" or "Painter's Choice", I don't remember about the apostraphie.
I hve never doen a search on it, as I can get it any time locally.
For electric use Krylon should work just fine.
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is it a rustolem product ?
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Not Rust-o-Leum, but another product from the same company as mentioned above.