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#Post#: 7354--------------------------------------------------
Using plywood sandwiched together and glued as the frame rails
By: zippot Date: August 8, 2022, 3:25 am
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Hello There
I'm reading through the build logs on this and other sites and
was wondering has anyone built a frame from plywood that has
been sandwiched together and glued. Although I can weld to a
fashion (bird droppings ) I,m finding that the price of steel or
ash is very expensive. Being brought up In Yorkshire I,m very
careful spending money (tighter than two coats of paint.) I did
read where a frame was built from a old aluminium ladder and
I'm keen to use recycled materials whenever I can. Thanks Dave.
#Post#: 7355--------------------------------------------------
Re: Using plywood sandwiched together and glued as the frame rai
ls
By: RhysN Date: August 8, 2022, 5:04 am
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Hi Dave, I am going to beat the drum in favour of wood again!
Have a look at this link. The car has been thrashed for years
(more like a decade now) by many, including me, It will answer
your question.
HTML http://www.gittrevillegp.com/www.gittrevillegp.com/The_Cars_A/Pages/Bloody_Mary.html
#Post#: 7356--------------------------------------------------
Re: Using plywood sandwiched together and glued as the frame rai
ls
By: zippot Date: August 8, 2022, 10:14 am
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That looks superb, low centre of gravity lightweight and as ply
is used the expense of ash or steel is greatly reduced.
Beautifully made car, it does look very low but i'm guessing
that they don't go off road much anyway, .
Are the bolt on parts bearings, axel etc strengthened where
they connect to the wood ? and how is this done. Think I have
found my method of construction. Do you know of any other
wooden constructed car builds similar to this, I could have a
look at. The quality of the builds I have seen so far is
excellent. Thanks Dave
#Post#: 7357--------------------------------------------------
Re: Using plywood sandwiched together and glued as the frame rai
ls
By: synthpunk Date: August 8, 2022, 12:22 pm
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I did.
It’s all made from 6mm birch furniture ply and 6mm marine ply.
By sandwiching thin ply sheets together you can bias the number
of longitudinal vs vertical grain directions in the finished
piece. So mine has more horizontal plys than vertical. It also
makes bending things to shape quite easy, and then laminating
them up, for shaped parts.
Here’s my build log-
HTML https://cyclekartsgb.createaforum.com/build-journals/riley-special-chassis/
Cheers!
Rich.
#Post#: 7358--------------------------------------------------
Re: Using plywood sandwiched together and glued as the frame rai
ls
By: synthpunk Date: August 8, 2022, 12:30 pm
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The side rails ended up 36mm thick at the ends, and with hollow
bits that take em up to about 100 mm thick in the middle.
They’re hollow in the middle section only, with a torsion box
lattice structure internally, filled with expanding foam. The
seat, scuttle, floors, cockpit sides, front end and bulkheads
are all also hollow, foam filled torsion boxes.
It is very strong, very rigid, and really quite reasonably
light. Also has rear suspension based on rubber cones.
All the spinny and bouncy parts bolt to thick aluminium spreader
plates, that are bolted through the frame rails. The holes in
the rails are sleeved with stainless tube to avoid mangling the
rails with bolt threads, and them then going rotten.
#Post#: 7359--------------------------------------------------
Re: Using plywood sandwiched together and glued as the frame rai
ls
By: RhysN Date: August 8, 2022, 4:08 pm
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[quote author=zippot link=topic=945.msg7356#msg7356
date=1659971668]
That looks superb, low centre of gravity lightweight and as ply
is used the expense of ash or steel is greatly reduced.
Beautifully made car, it does look very low but i'm guessing
that they don't go off road much anyway, .
Are the bolt on parts bearings, axel etc strengthened where
they connect to the wood ? and how is this done. Think I have
found my method of construction. Do you know of any other
wooden constructed car builds similar to this, I could have a
look at. The quality of the builds I have seen so far is
excellent. Thanks Dave
[/quote]
I hope this doesn't come across as negative, but I'm sorry Dave,
you couldn't be more wrong about the use of the Mary off road if
you tried hard. It, to my certain knowledge has done several
hundreds of miles in much more rugged conditions than any of the
GB cyclekarts. I drove it in the Campbell Cup and it is VERY
rough, the car gave no issues except the Doug pretzled some very
lightweight wheels. If you use part of the link I gave you , you
will see many events where it, and many of the Gittreville karts
are used, and they are multiples of times harsher than any of
the events in the UK. Just leave out the bit after /the cars and
look at events. Another of the wooden made cyclekarts is
Derek's Bentley, here
HTML http://www.gittrevillegp.com/www.gittrevillegp.com/The_Cars_B/The_Cars_B.html,<br
/> also used in the Campbell Orchard, Gordon Bennet events and
such. The posts on the link I gave are more detailed than you
will find anywhere.
#Post#: 7360--------------------------------------------------
Re: Using plywood sandwiched together and glued as the frame rai
ls
By: zippot Date: August 9, 2022, 4:44 am
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No mate not Negative at all ,it just proves to me how durable
this type of build is.
Dave
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