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How do you sheet foam wings?

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How do you sheet foam wings?

Old 09-10-2002, 04:01 PM
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Default How do you sheet foam wings?

I am considering building a Lanier Cap 232 kit which comes with foam wings. I have never worked with foam wings so I need some help. I have read a few posts about using Probond. I guess that I am looking for the easiest and strongest way to do it. Anyone have experience with this kit?
Old 09-10-2002, 04:53 PM
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Default How do you sheet foam wings?

I used Probond and a vacuum bagging system (home built) to sheet the foam wings of my Texan.

It worked excellent!

Ted
Old 09-10-2002, 06:29 PM
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Default using Probond

Check out these web sites.

http://www.scaleaero.com/probondwingskin.htm

http://www.aerobatix.com/aerobatix/articles/probond/

http://www.rcfaq.com/answers/modelbu...oamcutting.htm

http://world.std.com/~racores/repair_hints.html
Old 09-10-2002, 07:19 PM
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Default TRP

TRP, have any pics of your vac setup?
Old 09-10-2002, 07:41 PM
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Default How to sheet foam wings

My .02 cents worth. I have enclosed a photo of 5 sheeted foam wings. 1 giant stinger, 2 Stinger 120, 1 Stinger 60, and 1 stinger 40. The 40 size is sheetet with 3M 77 contact cement. A lot of people do not like this glue because it separates. This one has been sheeted for more than 5 yrs and there is no separation. I have sheeted a lot of wings with this glue and never had a separation.
One of the other wings was sheeted with slow epoxy. The other three wings are sheeted with ELmer's Probon. I like this glue the best. The wing is solid as a rock. The 40 is sheeted with 1/16".
All of the others are sheeted with 3/32". The kits call for partial sheeting of the wing. but I sheeted the entire wing. This adds a lot of strength without a lot of weight. All of the 4 larger wings were vacuum bagged.
Good luck
Lee
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Old 09-11-2002, 04:52 AM
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Default How do you sheet foam wings?

Lee -

http://www.rcuniverse.com/showthread...hlight=bagging

about 1/2 way down the first page.

Tedd
Old 09-11-2002, 01:20 PM
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Default How do you sheet foam wings?

I have used the 3M 77, epoxy, and probond.
The 3M is easy and works well. The epoxy is also not a hard thing to use. I put the wing cores back into the saddle and put weight on top, all on a flat counter. Both of these methods work well and will give you a strong wing.

BUT this last wing I covered, 84 inch Hots, I used Gorilla core bond. I like this method the best. I like it because it foams just a little and fills gaps. Working time is about 20 minutes, you do have to put weight on the wings overnite.

I will use the Gorilla glue again. I still have 3M 77. I use this for sticking sand paper to a sanding block. I still have epoxy, I use this to fuel proff a fire wall.

Just my 2 cents worth.
Old 09-11-2002, 03:59 PM
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Default How do you sheet foam wings?

I pretty much understand how bagging works, but is there anyway someone could simplify the set up? Maybe some kind of wiring diagram type of picture would really help clear this up. Would be greatly appreciated.
Old 09-12-2002, 05:01 AM
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Default How do you sheet foam wings?

Lee,

Please visit:
http://www.rcuniverse.com/showthread...3&pagenumber=2
just less than 1/2 way down the page you should see the one I used as my guide.

If you have questions... feel free to email me [email protected]

Happy bagging!
TRPP
Old 09-12-2002, 06:29 AM
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Default TRP

TRP this is good information. Thanks for the heads up.
Lee
Old 09-12-2002, 10:11 AM
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Default How do you sheet foam wings?

The use of 3M #77 spray contact adhesive is from a by-gone era.

There are adhesives now that give a far superior bond to wing sheeting over foam. If you are in a hot environment and plan on keeping your plane for any amount of time, the chances of 3M #77 debonding are high.

Having said that, I know we will now have testimonials on how people have used it for eons with no problems.

My experience with it, is that it is not a permanent bond, just read the instructions. Unless they have revised them they say for a removable bond just spray one surface. For a more permanent bond spray both surfaces...."more permanent bond"? Also 3M recently revised the #77 formula, it now contains a solvent that attacks foam. If you choose to use it, test a scrap piece of foam. Don't assume that because it doesn't attack the foam immediately it's safe. Let it sit a few days to be sure.

Probond (polyurethane) glue, White glue, epoxy are all superior to #77, but the choice is yours.

Good luck
Vince
Old 09-12-2002, 12:51 PM
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Default How do you sheet foam wings?

Do not use 3M-77, for what ever reason they have changed the formulation of 3M-77 and it now eats foam! If you can find the old (Black can) you can use it with out a problem but as mentioned in other posts there are better adhesives.
Old 09-12-2002, 05:22 PM
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Default How do you sheet foam wings?

I vote for the polyurethane glues (Elmers Probond). It's easy, light and the foaming action makes it very strong.

Sheeting foam wings seems to be this mysterious dark art thing....until you do it. Then you wish that all of your kits came with them. Just give it a go, you'll be glad you did.

BTW, I used this article...as from the post above

http://www.aerobatix.com/aerobatix/articles/probond/

Bob

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