Gearbox woes
- Thread starter Albervin
- Start date
Anythink that rocks, rather than rotates , is better off with a bronze bush. I beleive the fault is called brinelling.
Steering head bearings?
And the size of the dots are measured on the Brinell scale.The VOC members certainly know how to connect the dots
Eddy asked if I add some numbers. It’s a while since I looked at this, but for what it’s worth….
With the original Vincent damper fitted, the top link can move through 53 degrees, and the bottom damper through 55 degrees.
I gave up on extending my model further to calculate all the forces, but the forces in the links at full full compression, solely as a result of the springs pushing forward (@42 degrees) must be somewhere near 1000 lbs tension for the bottom link and 600 lb compressive for the top link.
Obviously, braking forces act on the links in the opposite direction.
I got as far as working out that to stop from 30mph in 29 ft is 1.037 g. (I think many road tests were around this.)
Plucking some figures from the air:
Assuming an all up weight of 620 lbs, and that the front brake is doing 60% of the braking, the force at the tyre contact patch comes out 386 lb, and this has a lot of leverage beacause of its distance from the links.
Ted Davis writes that under instruction from Phil Vincent he did tests with a Comet equipped with a system that sprayed paint onto the road when the brakes were applied.
He achieved a best stopping distance of 21 feet, which requires 1.43g.
That seems quite extraordinary to me.
With the original Vincent damper fitted, the top link can move through 53 degrees, and the bottom damper through 55 degrees.
I gave up on extending my model further to calculate all the forces, but the forces in the links at full full compression, solely as a result of the springs pushing forward (@42 degrees) must be somewhere near 1000 lbs tension for the bottom link and 600 lb compressive for the top link.
Obviously, braking forces act on the links in the opposite direction.
I got as far as working out that to stop from 30mph in 29 ft is 1.037 g. (I think many road tests were around this.)
Plucking some figures from the air:
Assuming an all up weight of 620 lbs, and that the front brake is doing 60% of the braking, the force at the tyre contact patch comes out 386 lb, and this has a lot of leverage beacause of its distance from the links.
Ted Davis writes that under instruction from Phil Vincent he did tests with a Comet equipped with a system that sprayed paint onto the road when the brakes were applied.
He achieved a best stopping distance of 21 feet, which requires 1.43g.
That seems quite extraordinary to me.
With respect to the UJ earlier, the jury is out. The bearing probably oscillates, but due to the way the bearing's loaded, there is a possibility that the rollers move slightly farther in one direction than the other, meaning that the rollers and cage will rotate slowly distributing the load and wear. But since there are no UJs on a Vin who cares?
H
H
In the absence of vacuum equipment, you think boiling the bush in oil would be adequate? I did this many years ago, and at least some of the air/solvent bubbles out, to be replaced by oil as it cools down.