How to bend
Foam Board
How to shape foamboard / Dollar Tree Foam
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okay show you welcome back to the doctor
sees Journal and this is a kind of a bit
different kind of video this is
especially for a catch other customs
really and well let me first do a little
intro of what it's about and most of you
know that I built my scratch build
planes like this one out of foam board
which is a type of foam with a layer of
paper on each side which makes it makes
it very stiff and stiff also means it's
a hard to bend let me show you here I
have a scrap piece of the foam board and
it's you can bend it but it's it's very
stiff so what Turkish our customer asked
me is if you can make curved structures
with this foam board for instance if I
if I would want to something like that
you put imagine that I want to do the
nose of this plane this curved piece and
if I would want to do it out of foam
boards how do you do that so that's what
this video is about how to shape foam
boards and let me zoom in on some pieces
of foam boards here I look here so
here's a sample of a very square
structure in foam board that's not what
this video is about it's about how to
make
pink curve all right so like I said let
me quickly zoom in on the pieces we've
cut here just a second okay so we don't
need this square piece in here gone and
I've got three identical pieces over
here and these we will use to make
curved structures now it's really quite
simple of course you need to calculate
what the arc needs to be but you can
experiment with it a few times first and
let me first show you what the technique
involves I'm going to draw a few lines
on this disk piece which are at 90
degree angles to this side and I'm gonna
draw what how many five lights there
Darren exactly one centimeter apart and
this distance is not for any real reason
to be honest but just to show you what
the end result of this distance would be
okay we've got our five lines and now
we're not gonna use a knife to be able
to curve the structure but we'll we're
gonna depress every line so we're gonna
press into the phone so I'm not going to
be damaging anything I'm just going to
push it down
I hope it's visible and laughs this way
and of course I try to put an even
tension and equal amount of ten
on every line okay we've got five lines
squat and now I need to bend every
section a little so I put my ruler on it
so it I have a good grip on it and I
just bent that section up slide the
ruler to the second line and I bend
that's one up and I'll sure you get an
idea of what I'm doing it now I'm just
gently bending up every line there we go
and well why do you know it's a bit of a
tight corner this a narrow arc foot it's
an arc now of course if I would have
spaced these lines further out I would
have a wider arc and well let's just do
that as well just a second all right
once again I've not drawn your tie lines
just at the enter points but result will
be the same and I've made twice the
number of points two on this pocket is a
sample so the art should be
approximately twice as wide and well as
you can see it is very simple process
there's no fiddling about and there's no
oh how deep should I cut slides or do I
cut them at an angle you just press down
on every
line and you'll be good to go
now okay same process again I put my
ruler on the line and I bent it from
over next line and bend it over and over
over this takes a little time of course
but the end result will be a nice smooth
round arc there we go now of course the
inside doesn't do well it looks nice but
the outside really nice and round if I
for instance would glue this down on
this board the board is a big too wide
for instance like this am i in shot like
this you'd have a nice roof of a Kemper
for instance at RV so that that works
out a varial and this is very stiff as
well now the last sample I'll do is you
might think well this is nice and round
but I'd like to have it run in a point
tapered I'd like to make a cone shape
for instance well that's very simple as
well and I haven't prepared that for
this video but so let me do it on the
fly here our first mark out the center
of this board here
Center center and if you're watching
this and wondering how I'm going to make
a comb well just to try to figure it out
for yourself but I'm going to start now
I'm going to make marks at 1 centimeters
on this side and 4 centimeters for okay
I've got 8 the 9 marks at 1 centimeters
on one side and how big am I going to
make this okay I'll make marks at half a
centimeter increments on this side hmm
my hand is probably in the way sorry
about that
there we go okay now we're going to
connect the dots that's very simple of
course now once again I haven't prepared
this for the video so I'm not sure what
the cone will look like if you're
designing like an O section for a plane
you'd have to do some calculations on
the radiuses of of both sides but just
to show you how to do it in principle
should get you started
alright oops I messed up one line damn
it the pressure of YouTube okay and then
we'll go and depress those lines again
very depressing that
okay now I'm not even sure if that this
is going to show up on camera very well
but the idea should be clear this if you
just make the spaces of the lines at one
point at the one side smaller than on
the other side you'll have a cone shape
and well like I said this is an easy way
and you don't see any damage to the
paper on the outside this is an easy way
to make curved structures out of foam
board so hope that was helpless
and if it wasn't to hit me up some
comments and I'll try to do it in a more
clear way and see you back in another
video bye bye
