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CycleKarts GB
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#Post#: 12199--------------------------------------------------
Fantasy CycleKart builds
By: Jimr1999 Date: December 29, 2024, 2:47 am
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Whilst enjoying a small eggnog this yuletide, I got to
scratching the old bonce about what would be the ultimate
cyclekart build for me as a technical challenge. After building
the Auto Union, which took me about a year, I vowed that the
next build, if it happens (high probability) will be a simple
basic cyclekart. That said, back to the topic.
Question
If you had a big spacious workshop full of all the machine tools
you could need, all the time in the world and the skill to build
it - What would be your ultimate cyclekart?
So, answers on a postcard* (*read post yours below) With an
image and why that pre war car for you?
I will start the ball rolling with the 1935 MG Type-R Monoposto.
I would build this as it looks great and it would be a good
challenge to get both front and rear double wishbone torsion bar
suspension working and lightweight, Rick Eggers in the states
has already done work on the torsion bar system for his
cyclekarts, this would need to take it even further. The body is
fairly complex too.
JimR
#Post#: 12200--------------------------------------------------
Re: Fantasy CycleKart builds
By: NewbieNick Date: December 29, 2024, 8:36 am
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Hi Jim, another MG for you, MG Magic Midget 1932 first 750cc to
reach 120 MPH. Another plucky Brit. Super Streamlined Austin
Seven 1935.
Regards Nick
#Post#: 12201--------------------------------------------------
Re: Fantasy CycleKart builds
By: jon.pearce Date: December 29, 2024, 1:31 pm
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The MG-R Type is full of potential for a "Full House" Cyclekart
build.
ie. Front and rear torsion bar suspension and low and
lightweight.
Its got me thinking that this will be my next one ....!!
#Post#: 12202--------------------------------------------------
Re: Fantasy CycleKart builds
By: Jimr1999 Date: December 29, 2024, 11:40 pm
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Nice Nick! getting in one of them might need a removable canopy
to keep the look. Good fantasy builds, keep em coming. And rock
on Jon! I would love to see that one done.
JimR
#Post#: 12208--------------------------------------------------
Re: Fantasy CycleKart builds
By: Ade Colmar Date: December 30, 2024, 5:22 am
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Interesting that torsion bar suspension is a recurring theme!
It does make for very space efficient suspension, which is
probably more important in a cyclekart than a full size car.
In case anyone wants to take this further, I did work out a way
of adapting trailer 'indespension' style suspension units which
may be of interest to others. Most of these trailer units are
too stiff for a cyclekart and are made as a single unit so they
can't be welded without destroying the rubber. However, there
is one company 'Watson-Jones', who may lightweight units (150,
250 and 350kg) that can be disassembled. This allows you to cut
and weld the suspension arm to the length and angle needed for
your project. You can then reassemble it afterwards and damage
to the rubber part is avoided. Doubling the length of the
suspension arm (originally 75mm) halves the effective spring
rate of the unit and also makes them easier to incorporate into
a suspension design.
I investigated this when I was thinking of building an ERA or
Auto Union and I will be using an adapted version of the units
that I bought for the top radius arm of my Riley IFS.
#Post#: 12460--------------------------------------------------
Re: Fantasy CycleKart builds
By: RhysN Date: January 23, 2025, 4:12 am
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The rubber type suspension can work very well. If you look up RA
Vanguard which competed at Goodwood recently, that had bungeed
cord on the front, both as spring and rebound. Issigonis
Lightweight Special also had rubber, of course original Mini did
too. When we built a very light back end for a mini the
"doughnuts" received a lot of holes. (Drilling rubber isn't fun)
Another very light car I had peripheral involvement with used
squash balls in comprssion, they come in various hardness. They
were in a tube with a plunger acting on the end of the ball
"stack"
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