Subject: Re: anti-squat with an IRS by CFI-EFI on 2009/2/28 0:59:16
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CentralCoaster wrote: Sorry, you lost me at the knuckles "see" the engine torque.
They don't. They can't. There's a bearing in there, which can't transmit any torque to the knuckle.
I haven't figured out how to explain or illustrate it, yet, but I'm pretty sure they do. I understand the point about the wheel bearing. But there are wheel bearings in a solid wheel end also.
Quote:
CentralCoaster wrote: The 3rd member on the other hand, does see the torque, because the pinion is trying to climb the ring gear, pushing the snout upwards. You can do that all day long, but the only torque it's going to transmit to the knuckles is some tiny amount from the twisting/binding of the lower camber rod bushings.
I don't think the pinion trying to climb the ring gear is the major force, here. Remember, the torque input at the pinion yoke is only approx 1/3 the torque at the spindle. If the bulk of the torque were at the pinion yoke, the "C" beam would be turned into a pretzel. I disagree about "tiny amount from the twisting/binding of the lower camber rod bushings." It is the dog bones connected between the knuckle and the frame(?) that take care of the reactive twisting.
As a further example, look at the C5 and C6 with their upper and lower control arms like the front suspension. With no 4 link bars, traction bars, or what ever you would prefer to call them the C5 & C6 have major wheel hop problems. Especially when you increase the traction. Just like it does with a Hotchkiss suspension.
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CentralCoaster wrote: I have a feeling that somebody that does this stuff for a living is going to show up here and make us all feel stupid!
