Model Plane Foam the Story and Product - Page 99 - RC Groups
View Poll Results: How much foam do you consume?
1 bundle or less per year 83 33.88%
1-2 bundles per year 98 40.00%
2-6 bundles per year 42 17.14%
1-2 bundles per month 7 2.86%
2-4 bundles per month 4 1.63%
4 or more bundles per month 11 4.49%
Voters: 245. You may not vote on this poll

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Aug 23, 2012, 08:51 PM
Warriors
Quote:
Originally Posted by Wilfor
Thats kinda what i'd like to try with your Biplane , with some carbon down the middle .



You might wanna check out Freddie B's threads https://www.rcgroups.com/forums/show...3&postcount=32 rubber cement works well
Thanks Wilfor for pointing out to that post. Rubber cement is cheaper. Thats why I wanted to go for that. Also many Banana Hobby planes are glued with Rubber cement
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Aug 24, 2012, 11:31 AM
Warriors
Nice looking plane David, did u try finding the Decals for polaris online somewhere..
Aug 24, 2012, 11:32 AM
Warriors
Nice looking plane David, did u try finding the Decals for polaris online somewhere..

Quote:
Originally Posted by davidterrell80
My first scratchbuild in 30 years and my first Foamy (and it's made from from MPF)... a Polaris Seaplane. I'm very satisfied with the product.

Next... a Cartoon C-119 based on a toy I received for Christmas in 1963. It will be my first build thread...
Aug 24, 2012, 11:36 AM
Lost in Oblivia
kaptain_zero's Avatar
Quote:
Originally Posted by Wilfor
You might wanna check out Freddie B's threads https://www.rcgroups.com/forums/show...3&postcount=32 rubber cement works well
Thanks for the link! As I said, I wasn't sure about the solvents in rubber cement, now I know that at least the Elmers brand works. Interesting!

Regards

Christian
Aug 24, 2012, 02:41 PM
treefinder
springer's Avatar
An interesting sidelight on the adhesive ideas is what my older Aussie Bro has used: water based urethane varnish! He has applied it to one surface of an area to be laminated and laid the other on, set under weights and within a few hours gets a bond as good as gorilla glue, without the foaming. I haven't tried it yet, but plan to and will report how it works with MPF>
Aug 24, 2012, 06:51 PM
RC Adddict
Wilfor's Avatar
Quote:
Originally Posted by springer
An interesting sidelight on the adhesive ideas is what my older Aussie Bro has used: water based urethane varnish! He has applied it to one surface of an area to be laminated and laid the other on, set under weights and within a few hours gets a bond as good as gorilla glue, without the foaming. I haven't tried it yet, but plan to and will report how it works with MPF>
He's probably applying the varnish to the bottom sheet so make sure you apply your to the top sheet . We know everything he does down there is upside down .. Or is it backwards?
Aug 24, 2012, 08:42 PM
treefinder
springer's Avatar
He told me it's all old wives tales, that even the drains run the same way as ours!
Aug 24, 2012, 10:34 PM
Build straight - Fly twisty
Whiskers's Avatar
The only thing around here that goes backwards is time.
When I VOIP Springer on my Monday morning it's his Sunday afternoon.

And yep, the polyurethane varnish is a good foam glue. For laminating I leave it overnight to set.
Aug 25, 2012, 12:33 AM
just Some Useless Geek
Of course, WBPU is the "paint" of choice for priming EPS foams, too. The stuff adheres like there's no tomorrow and makes for a fine base to accept all kinds of other paints. Look around on this board for discussions about priming and painting foam and you'll see lots of mention of WBPU.

WBPU is also used as a low cost, low weight method for "glassing" EPS using fiberglass weave or lightweight nylon sheer curtain material. It's a lot easier and less messy than the real thing with epoxy and vacuum bagging, etc.
Sep 01, 2012, 11:47 AM
Registered User

10mm MPF, coming up


Immediately after putting these two pieces together, with the Elmer's still wet between them, this 11" x 39" piece of laminated MPF felt very stiff and strong. I'm in no hurry, and I know Elmer's takes a long time to dry when it isn't exposed to air, so I'll give it at least a week before I cut it into a wing for one of my biplanes.

I'll also make a 6mm Depron wing for comparison. I want to see how the 10mm MPF wing, with an 8mm carbon fiber spar in it, compares to the Depron I've always been using. I'll tape both wings up with Scotch heavy-duty clear packaging tape, like I always do, and compare stiffness and weight.

My first impression, though, is that this is going to work, and it's stiffness may make it a very viable alternative to the material I've made so many planes out of.
Sep 01, 2012, 07:37 PM
Registered User
dear springer, i live in grand rapids mi and i was wondering if there was a place i could pick up the new model airplane foam instead of having it shipped, i am interested in a bundle.
Sep 01, 2012, 10:41 PM
treefinder
springer's Avatar
Pwg: unfortunately I think we got all they made. So east side of the state is the only place to get it. Adams doesn't sell any retail as far as I know. We could arrange a pickup if you happen to be over this way I suppose.
Sep 01, 2012, 11:12 PM
just Some Useless Geek
Laminating is king when it comes to stiffening a soft material, Mike. I am starting to make my profile fuselages out of MPF now because it has the great features of being both forgiving and ultimately, strong enough to handle the long term stresses of wickedly agile sport planes. No more Smarty Pants breaking in half in midair!
Sep 01, 2012, 11:53 PM
AMA 986339 FCC KB5LAM/4
davidterrell80's Avatar

Cartoon C-119 Flying Boxcar


My 95% MPF Cartoon C-119, based on a toy I received for Christmas in 1965, is ready for it's first flight.

The only other material in the airframe was a few square inches of $Tree used to make replacement rudders, and only because it was ready to hand, when I had to make repairs after flubbing the installation of the control horns in the MPF originals.

The build thread is at https://www.rcgroups.com/forums/show....php?t=1703405

Thanks!
David
Latest blog entry: Remembering Bob Hoover
Sep 02, 2012, 11:55 AM
Registered User
Quote:
Originally Posted by A Useless Geek
Laminating is king when it comes to stiffening a soft material...
I just checked on it. The Elmer's is starting to set up, and the piece is feeling really stiff.

I'll still give it a full week before I work on it, but it looks very encouraging.


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