larryb
Hi there, I am from Canada and I am building the F22 v2... Depron is impossible to find here, so I'm using the 3/16 inch "project board" or dollar tree board. I have read some people having problems with this stuff they leave the paper on, such as the taped hinges becoming loose as the paper delaminates from the board. My question is,how are you removing this paper? I wish there was another product that was readily available to me besides this foam board., makes me want to print the plans out at 200 % and use 1/2 inch foam..... Hmmmmm, makes me think
Larry
ANYthing WILL fly ..... it just needs enough POWER
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Argonath
it just peels off. I can usually get the paper off in a single sheet. In fact, I usually give them to my 8 yr old who uses them to draw on because they're 20"x30" in size and he LOVES them.

If you have difficulty you can use a sprayer to moisten the paper to help peel .
D.I.L.L.I.G.A.F.
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larryb
Really? Gosh, I tried peeling it off, got about 2 sq. Inches off before it just tore, like a decal or sticker that won't come off. I just left it, and I will probably just remove where the glue joints are. The first plane is the "demo" so no need to get fancy.
ANYthing WILL fly ..... it just needs enough POWER
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F1wanabe
For dollar tree I stand the board in the sink and drench it with warm water. Or in a shower. Like Argonath said, it should peel off in one sheet within a minute.

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squishy
I use a spray bottle with alcohol and water in it, I spray it on wait a moment and then the whole sheet of paper falls off in one piece.
"Education is not about filling buckets; it is lighting fires." W.B. Yeats

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larryb
Okay, thanks for all the help
ANYthing WILL fly ..... it just needs enough POWER
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WaynesvilleRC
I only use foam board, and I've found that two kinds are made differently. Elmer's board has the paper glued to the foam, so the paper does not come cleanly off. I soak it in hot water for about an hour or two, then start stripping away the paper. I'm picky so I spend lots of time scrubbing with my hands and a sponge and this leaves the pure foam, no adhesive or paper. It takes forever though!

Foam board from Hobby Lobby is different and MUCH quicker. Soak it for like 20 minutes; I tried doing this dry and it didn't turn out well. Instead of glue, there seems to be a membrane between the paper and foam, almost like a mix between hot glue and plastic wrap. If you get a fingernail under that it pulls SOOO cleanly and easily off the foam. However, the only downside to this is this brand warps really easily.

So it's a tradeoff, but I generally go with the faster warped foam, and the warping isn't noticeable unless you're using like a full sheet uncut. I've haven't bought any foam from Dollar Tree so I don't know how it's constructed.

Hope this helps,
-WRC
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larryb
It sure does help, thanks to all you guys for your input here.
Now where did I leave that knife?
ANYthing WILL fly ..... it just needs enough POWER
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farside
But why do you have to remove the paper? I asked this question before but got only one answer that you could leave it on.

Denny
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Flightman
The paper can become soggy, it is hard(ish) to make good joints because the paper might rip. Its just easier to take the paper off and not have to worry about it ripping and crap. (You dont HAVE to remove the paper)
Don't tread on me!

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F1wanabe
I agree. If you ever land on soggy grass the paper warps. On a humid day it can start rippling. Bevelling edges is harder and gluing ends together is tougher. Paper also weighs 30 % more than no paper. The difference between going vertical and not :-(.

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Argonath
Quote:
For dollar tree I stand the board in the sink and drench it with warm water. Or in a shower. Like Argonath said, it should peel off in one sheet within a minute.

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I almost never wet it. Rarely. I'm able to peel it off usually in one piece.
D.I.L.L.I.G.A.F.
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Argonath
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But why do you have to remove the paper? I asked this question before but got only one answer that you could leave it on.

Denny


It's better to remove the paper because when you're taping your control surfaces, the paper can peel off leaving your control surface in a less then functional state. Typically while in flight..

Also, when you glue the parts together, your pieces can shear apart when the paper tears off (again, usually in flight). Some people leave it on, most don't I think. Taking it off will save you weight but depending on your design, you might be replacing that weight with CF to make up rigidity in the surfaces.

The best way to know which you prefer is to try both for yourself and see which you prefer.
D.I.L.L.I.G.A.F.
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F1wanabe
That because you buy Canadian dollar tree foam and I buy American dollar tree foam. American dollar is worth crap now. So is the foam! I have to wet mine.

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Limie99
Hello Fellow Canadian,

And welcome to the Depron deprived North.

You could go down to your local art supply store and try and find acid free paper foam board (used I believe for water colours).
The sheets I get are 40" x 30" with paper on both sides. The sheet weighs about 16 oz. with paper on it. Take the paper off
comes off in one sheet either side) and weigh it and you will find it weighs 12 oz. It leaves with sheet of foam that weighs 4 oz.and is approx. 5mm in thickness. A single sheet costs about $8.00

It builds well, but I usually laminate 2 pieces together to make wing surfaces more rigid.

Here are a couple of examples of planes this foam has made.

F-22 and Fleet 013.JPG 
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