ady8077
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| posted on 9/6/04 at 10:37 PM |
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Hi Joelp
I posted a pic on page 1  you commented on them ???
Top rocker and bottom wishbone
I reallised you were talking about locost wishbones but i thought i'd show the Stylus type because they look very easy to design, and do away
with push rods and pivot blocks
Adrian
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JoelP
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| posted on 10/6/04 at 07:22 AM |
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oops, at least i never claimed to have a good memory!!!!!
i remember now. thats a good way of doing it, provided you can make it strong. a good approach might be to make it trianglar. i wonder what the weight
difference is? my personal favourite is the other picture with a pushrod and simple rocker.
Beware! Bourettes is binfectious.
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Gripenland
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| posted on 10/6/04 at 05:28 PM |
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This is how I made my push rod suspension. The actual push rod in the pic is a dummy. I've got some aerofoil tubing that I'll use instead.
I think I made six prototypes before I made one that will not only will work, but also fit inside the car...
 
Pushrod suspension 2
By moving the bottom fixationpoints of the shockabsorber, I can change the gear ratio from slightly progressive to linear.
[Edited on 10/6/04 by Gripenland]
kokos-racing.com
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britishtrident
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| posted on 11/6/04 at 10:34 PM |
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Lotus 33 style rocker arm inboard suspension isn't worth the trouble - a lot of Formula Ford manufacturers tried it in the late 70s and then
reverted to conventional suspension before push rods came into fashion. The loads it places on the chassis and top wishbone are way above
anything seen in the book chassis and it isn't hard to get in a situation where the wishbone and chassis flex gives more suspension movement
than the springs.
Push rod suspension is a different matter the chassis loads are still very high but they are easier to contain and decent rising rate suspenion comes
free. However look carefully at the changes made to FF chassis design when push rod suspension came in vogue -- the front part of the spaceframe
became much more complex with lots and lots of extra tubes.
An easier alternative is pull rod suspension which MacLaren pioneered in the early 70s.
[Edited on 11/6/04 by britishtrident]
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JoelP
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| posted on 11/6/04 at 10:46 PM |
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i may be wrong, but i think steve graber is using pull rod suspension. his site is full of good stuff and pics.
Beware! Bourettes is binfectious.
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crbrlfrost
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| posted on 11/6/04 at 11:06 PM |
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I think britishtrident's last post has to be one of the best on this thread. Cheers!
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