Nisseven
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| posted on 31/5/06 at 09:05 AM |
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An interesting thread so far, but I have a question. If using rod ends as in the photo in the first post, how do you manage to fit them with out
submiting a side force of some discription to the joint? I know you would use washers and shims to adjust the space in between but you would have to
be very accurate to not load the joint one way or the other? Perhaps a slight loading does not matter as there seems to be plenty of people building
wishbones this way.
Bruce Kelly
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nitram38
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| posted on 31/5/06 at 09:27 AM |
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Plenty of racecars use them, including my mates Formula Renault:
 
Description
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Nisseven
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| posted on 31/5/06 at 11:06 AM |
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I was meaning when they are used in the vertical plane and also with a rigid wishbone? I suspect that in that photo the tie rod part of the arm is
also on a pivot at the other end which is not shown. I see them used horizontally like that a lot and I suppose that there must be a good reason but
it also seems that the only movement in a rear suspension is in the vertical plane, so it makes no sence to me? Looks like a nice set up though, just
the same.
Bruce Kelly
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nitram38
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| posted on 31/5/06 at 12:09 PM |
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You can mount the bottom two rod ends either horizontally or vertically, but it depends on the type of car.
The renault barely has 10-20mm of suspension travel. It is only 20mm off the ground.
If your wishbones are long enough, this will work on a roadcar aswell.
The big advantage of rod ends, is fully adjustable suspension. The trouble with bush mounted bones, is your measurements and tolerances have to be
very good, if you want your car to handle.
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JB
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| posted on 31/5/06 at 08:59 PM |
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Wishbones & Bearings
I have my spherical bearings mounted horizontal with 130mm of suspension travel on my road car. The wishbones are quite long though.
To answer a previous question about the photo on the first page about using rod ends for adjustable suspension without exerting bending loads in them,
you have to put a pivot at the outboard end of the wishbone so you can alter the angle between the 2 wishbones as you alter the length of them.
I personally find adjustability in suspension only really useful when initially setting up the suspension for the first time. After that it
practically gets left. So I used bolt on suspension mounting plates that I could alter to get the suspension pick ups correct. I will post a picture
when my website is back online.
John
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