Re: Cardboard Construction

On Jan 7, 11:22 pm, "Morgans" <jsmor...@xxxxxxxxxxxxxxx> wrote:

I used the type of very rigid blue foam that boat docks sometimes float on..
Heavy, but very strong.  I used brown kraft paper, like grocery bags are
made of.  I used very thinned glue, and put it on the paper and the foam..
After I applied the paper, I kept smoothing the paper with my hand until it
was mostly dry.  Until then, it was kinda wrinkled.  As it dried, it
smoothed out, and shrunk a little bit.

I would add that it helps to let the glue soak in for a while, so the paper
streatches out some.  That will help it shrink as it dries, as I remember.
It has been a few years back.
--
Jim in NC


I do all my foam cutting with the very light white beaded foam. It
has very little strengh itself but the paper covering creates a strong
shell (kinda like the aluminum skin of a full size plane). I used
white "banner" paper that weighed about half of what the kraft paper
weighs. To keep the glue from adding too much weight I cut it to fit
the wing, pre-sprayed it with water to let the paper relax and
streach. Then I brushed on thinned white glue (thin it to a good
brushing consistancy and add a couple drops of food coloring so you
can see the glue). The damp (not soaking wet) paper smoothed out
almost completely as it dired and with the glue diluted with water it
added very little weight. Make sure the "grain" of the paper runs
the same direction on the top and bottom of the wing and cover the
whole thing at one time to avoid building in a warp as the paper
dries. I fly CL combat with the Fox 36 combat special (about the power
of most 40's) and with paper covering and 1/4x3/8 balsa spars I have
never folded a wing doing almost 100mph and pulling tight 6 foot
turns. I overlap the paper for the middle 1/3 of the wing using an
oval pattern to spread out the load.
Bob
.

Relevant Pages

  • Re: blue foam sheets
    ... I keep reading about the blue foam sheets but don't understand the advantages. ... Use water-based latex glue, the thin kind that comes in pint cans. ... If the layout is to be portable, make a frame of 1x2 with crosspieces at about 12-16" centres, glue a sheet of 1/4" ply onto it, and glue a 1" foam sheet onto it. ...
    (rec.models.railroad)
  • Re: Noisy track
    ... When I took down the layout I took it to the dumpster in 4'x2' ... See if you can find a skinless source of foam as the skin ... is a pain to work with but will probably glue just fine. ... and/or types of ballast transfer noise at different levels. ...
    (rec.models.railroad)
  • Ballistics Coefficients - was Re: The foam did not do it
    ... resulting in Columbia's wing in effect running into the foam at about ... Surely you are not saying the foam dislodged from above the wing? ... I didn't comprhend it properly until I read "Columbia - Final Voyage" ... Or fire a cork out of pop gun out of a car going down the highway ...
    (sci.space.shuttle)
  • Re: Best glue to fix a split foam wing ???
    ... glue gun with me to the field. ... would be mere minutes to get a foam plane back in the air. ... Our local expert scratch built foam flyer uses hot ... pencils to the inside and outside of Styrofoam cups. ...
    (rec.models.rc.air)
  • Re: foam board and layout
    ... >> I'm concerned about support under the track area. ... >1 inch foam isn't thick enough as base and without lots of support. ... >a thin latex contact cement to glue the sheets together. ... stick in more risers. ...
    (rec.models.railroad)