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Old Jun 30, 2003, 04:00 AM
Adam Davis
Guest
n/a Posts
building a model airplane

i would like to know if it is possibleto build an r/c plane entirely out of
1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
all the electronics.


Old Jun 30, 2003, 04:00 AM
Geoff Sanders
Guest
n/a Posts
Re: building a model airplane

What sort of 1/8 plywood? All five-ply aircraft grade birch would be heavy!
Mostly light (OK, so the weak-minded spell it "lite") ply might not be too bad.
However, if you intend to cover it with plywood, forget it!!! The weight
penalty would be less with a larger plane. One in .46 size might be marginal
unless you're an accomplished builder and/or aeronautical engineer, and know
where to use the inherent strength of plywood, and where to pare it to the
minimum..

Adam Davis wrote:

> i would like to know if it is possibleto build an r/c plane entirely out of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.


Old Jun 30, 2003, 04:00 AM
Arne Reil
Guest
n/a Posts
Re: building a model airplane

i'll bet you can make one that will fly, not not very well..... and probably
only straight ahead, with very little turning ability.
..
Arne, CT, USA
=========================
"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>
>



Old Jun 30, 2003, 04:00 AM
John Alt
Guest
n/a Posts
Re: building a model airplane

In article <dgudna8dgO168GKjU-KYgg@comcast.com>, adam_davis@hotmail.com
says...
> i would like to know if it is possibleto build an r/c plane entirely out of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>

Many kits out there have the fuse sides made entirely out of the stuff.
Even the old Square soar 72 glider (airtronics/cox 2 meter glider of 20
or so years ago) had a fuse made entirely of it (cept for a little
sheeting aft of the wing, top and bottom). It is a very lightweight 1/8"
ply. Not the kind of stuff you get at any hardware store.
The wing is a different story. Not any good way to do it without adding
a lot of unnecessary weight. Yes it could be done, and no, it shouldn't
be done. Is there some bet you are trying to win, or are you trying to
find a use for an old door skin Just curious...
Old Jun 30, 2003, 04:00 AM
Rural QLD Call
Guest
n/a Posts
Re: building a model airplane

Are we talking about using *only* 1/8 ply and no other materials? IE. No
monocote for wings, no balsa anywhere in the structure? If so, why? The
weight penalty would be huge, if not insurmountable. Without some *major*
engineering feats to reduce the weight and still have a strong enough
structure to actually fly, you're going to end up with a veritable 'lead
sled'.

Is there a particular reason you don't wanna use balsa or foam? These are
the norm for aircraft building because of their low weight. Balsa is light,
extremely easy to work with and is quite strong if used the right way. It's
actually classed as a hard-wood, believe it or not :-) Foam is a bit harder
to use.....you need a foam cutter if you want to do your own wing cores, but
strength/weight is outstanding.

MrBonk
www.mrbonk.com

"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.



Old Jun 30, 2003, 04:00 AM
Bob Severance
Guest
n/a Posts
Re: building a model airplane

Yeah, you probably could. But I wouldn't fly it!

Troll
"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>
>



Old Jul 01, 2003, 04:00 AM
Brad Lorance
Guest
n/a Posts
Re: building a model airplane

forget about it........balsa is cheap, think light....always

Brad




"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>
>



Old Jul 01, 2003, 04:01 AM
tater schuld
Guest
n/a Posts
Re: building a model airplane

I assume you ask because you ahave a large supply of the mentioned wood.
while not good for air planes, you could whip up a bunch of range boxes,
sell em, and buy the balsa wood needed for a well designed plane.

--
Tater
President of MARS Club
www.treece.org/mars.htm
NAR #79654 L1
AMA #747769
EAA #703312
remove spam spelled backwards to reply


"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>
>



Old Jul 01, 2003, 04:01 AM
Joe D.
Guest
n/a Posts
Re: building a model airplane

If you had a 1.20 or larger engine, you are definitely in the ball park, but
the .46 is too small.

"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>
>



Old Jul 01, 2003, 04:01 AM
K day
Guest
n/a Posts
Re: building a model airplane

Not only the "weak minded" call it "Lite-ply". The people who make it
call it that. It's a registered trade name.

Ken Day

On Sun, 29 Jun 2003 16:28:28 -0700, Geoff Sanders <geoffs@hevanet.com>
wrote:

>What sort of 1/8 plywood? All five-ply aircraft grade birch would be heavy!
>Mostly light (OK, so the weak-minded spell it "lite") ply might not be too bad.


Old Jul 02, 2003, 04:00 AM
MJC
Guest
n/a Posts
Re: building a model airplane

It doesn't matter what kind of ply; lite or whatever. No .40 size aircraft
is going to fly well with any more ply than it takes for the firewall and
for the landing gear mount. Everything else needs to be balsa if the
aircraft is going to be fun to fly.
It's only when you get to the wing areas of giants that you can start
substituting ply and other woods because with the larger wing areas, you can
then allow slightly higher flying weight ratios.

MJC


"Geoff Sanders" <geoffs@hevanet.com> wrote in message
news:3EFF761C.F13BA28E@hevanet.com...
> What sort of 1/8 plywood? All five-ply aircraft grade birch would be

heavy!
> Mostly light (OK, so the weak-minded spell it "lite") ply might not be too

bad.
> However, if you intend to cover it with plywood, forget it!!! The weight
> penalty would be less with a larger plane. One in .46 size might be

marginal
> unless you're an accomplished builder and/or aeronautical engineer, and

know
> where to use the inherent strength of plywood, and where to pare it to the
> minimum..
>
> Adam Davis wrote:
>
> > i would like to know if it is possibleto build an r/c plane entirely

out of
> > 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine

and
> > all the electronics.

>



Old Jul 02, 2003, 04:00 AM
Boo
Guest
n/a Posts
Re: building a model airplane

MJC wrote:
> It doesn't matter what kind of ply; lite or whatever. No .40 size aircraft
> is going to fly well with any more ply than it takes for the firewall and
> for the landing gear mount. Everything else needs to be balsa if the
> aircraft is going to be fun to fly.


This is a bit of a wild generalisation : Glens CAP is designed for a
..53 and that is made mainly out of LightPly and it's had some very good
reviews. See www.glensmodels.com for details.

--
Boo

Old Jul 02, 2003, 04:01 AM
Penguin254
Guest
n/a Posts
Re: building a model airplane

Troll?


"Adam Davis" <adam_davis@hotmail.com> wrote in message
news:dgudna8dgO168GKjU-KYgg@comcast.com...
> i would like to know if it is possibleto build an r/c plane entirely out

of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.
>
>



Old Jul 02, 2003, 04:01 AM
MrBonk
Guest
n/a Posts
Re: building a model airplane

I wondered that myself, but hey, I've been asked *way* dumber questions than
that......

MrBonk
www.mrbonk.com

"Penguin254" <penguin254@comcast.net> wrote in message
news:aCsMa.12878$926.1466@sccrnsc03...
> Troll?
>
>
> "Adam Davis" <adam_davis@hotmail.com> wrote in message
> news:dgudna8dgO168GKjU-KYgg@comcast.com...
> > i would like to know if it is possibleto build an r/c plane entirely

out
> of
> > 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine

and
> > all the electronics.
> >
> >

>
>



Old Jul 03, 2003, 04:00 AM
Sand57
Guest
n/a Posts
Re: building a model airplane



Adam Davis wrote:
>
> i would like to know if it is possibleto build an r/c plane entirely out of
> 1/8 plywood ? Would the wieght be too great? i have a 46 fx os engine and
> all the electronics.



Yeah, no problem. Just need a lot of flying skill.

There was a Plywood Delta-wing kit around (SIG?) a while back.
It looked a little like this one:
http://www1.eboard.com/eboard/boards...7/Pc100049.jpg

It was a triangle made of plywood (I think it was 1/8) with a plywood
fuse
(a long box) on top with the servos mounted on each side near the rear
and the firewall/engine forward.
There was a plywood tail fin sticking up out of the fuse little else.

It was not for beginners, since it was a real rocket (reportedly).

If A Coroplas PizzaBox plane can fly, a plywood plane should fly almost
as well.

I'm making my planes out of Coroplas, it's a lot cheaper than plywood
 


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