Hub

[chayanitsingh]

Which of the two hub should possess high strength in a formula one -front or rear and why????

[Just_a_fan]

They each need to be strong enough for the loads expected.

[riff_raff]

The rear hubs must handle suspension loads, plus braking and driving torques. The front hubs do not have to handle the driving torques.

[Just_a_fan]

The front hubs do carry larger braking forces though. Ultimately the torque that the hub has to carry is limited by the tyre's ability to grip.

[marcush.]

Are we talking of the hub or the complete upright?


Picture of some formula 1 wheel hubs -METALORE-



the hub is usually made of 300M or Titanium



in formula 1 the upright must be Aluminium

[riff_raff]

As Just_a_fan notes, any hub should be strong enough to handle the loads applied to it.

However, with a Champ Car, the outside hubs must be much stronger than the inside hubs. Since the outside hubs will be more highly loaded than the inside hubs on an oval track.

[xpensive]

Are we talking of the hub or the complete upright?
...

I suspect that the question is about the upright, the hub itself is no big deal.

[Just_a_fan]

I've just noticed that the OP has been asking lots of this sort of question and little else. I'm guessing a student of some sort who wants his assignments done by others...

[-Felix-]

Or someone is preparing for design event on FSG, which is due today

[mep]

The front hubs do carry larger braking forces though. Ultimately the torque that the hub has to carry is limited by the tyre's ability to grip.

Careful there is a trap. The hub is the part which connects the brake disc with the rim and in case of the rear hub the drive shaft. You could apply full engine torque while having full brake torque. The torque the hub experiences can then exceed the tire grip (tires on low grip surface, ice, for example). Therefore the forces on the rear hub are by no means limited by the tire grip.

[Lycoming]

The front hubs do carry larger braking forces though. Ultimately the torque that the hub has to carry is limited by the tyre's ability to grip.

Careful there is a trap. The hub is the part which connects the brake disc with the rim and in case of the rear hub the drive shaft. You could apply full engine torque while having full brake torque. The torque the hub experiences can then exceed the tire grip (tires on low grip surface, ice, for example). Therefore the forces on the rear hub are by no means limited by the tire grip.

Good catch. Though, if you apply enough brakes to lock the tires and then floor it, don't you deserve whatever happens to you?

[Just_a_fan]

The front hubs do carry larger braking forces though. Ultimately the torque that the hub has to carry is limited by the tyre's ability to grip.

Careful there is a trap. The hub is the part which connects the brake disc with the rim and in case of the rear hub the drive shaft. You could apply full engine torque while having full brake torque. The torque the hub experiences can then exceed the tire grip (tires on low grip surface, ice, for example). Therefore the forces on the rear hub are by no means limited by the tire grip.

You could but that presumably isn't a design parameter rather a driver doing something totally stupid.

[Tim.Wright]

The other gotcha is that front axle braking torques can often be higher than rear axle drive torques. Depends on a few things though - cg height, wheelbase, tyres etc... Looks like our friend is going to have to do some calcs...

[riff_raff]

I think the worst case torque either the front or rear hub experiences would be the impulse torque produced when the tire briefly loses traction and then rapidly regains traction, such as when the tire goes over a bump in the track.