Rear Caster angle
Rear Caster angle
(OP)
Hi All, I am very new to the forum (this being my first post).
I am running a pair of non downforce single seater cars, and have a fairly close relationship with the chassis manufacturer I use.
I am conversant with front caster and the affects it has, but I have noticed some (very few) of the competitors are using as much as 4 degrees of positive caster on the rear uprights, while the majority run 0 degrees, which is a figure supported by the manufacturer I use.
Everybody I ask can give me no definitive reasons why this is used, or any true theory behind it, hence I am asking here.
Is it another method of controlling anti-squat/anti-dive? is it a method of controlling traction? I am limited as to the testing time I have at present so I am keen to realise some of the theory behind it before I try anything... Many thanks in advance!
I am running a pair of non downforce single seater cars, and have a fairly close relationship with the chassis manufacturer I use.
I am conversant with front caster and the affects it has, but I have noticed some (very few) of the competitors are using as much as 4 degrees of positive caster on the rear uprights, while the majority run 0 degrees, which is a figure supported by the manufacturer I use.
Everybody I ask can give me no definitive reasons why this is used, or any true theory behind it, hence I am asking here.
Is it another method of controlling anti-squat/anti-dive? is it a method of controlling traction? I am limited as to the testing time I have at present so I am keen to realise some of the theory behind it before I try anything... Many thanks in advance!





RE: Rear Caster angle
RE: Rear Caster angle
RE: Rear Caster angle
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RE: Rear Caster angle
Cheers
Greg Locock
Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Rear Caster angle
For racing, castor in the rear, or extra castor in the front, is sometimes used to provide increased camber gain while cornering.
RE: Rear Caster angle
Cheers,
Rob
RE: Rear Caster angle
1. May be packaging to allow a longer rear toe-control arm to reduce rear toe-link loads & result in less toe deflection during cornering
2. Or the opposite reason may be a deliberate desire to induce toe deflection during cornering by increasing rear kingpin moments during cornering. This is done on production cars sometimes...