Wheel assemblies

[ashish]

the weight of a wheel assembly (wheel, tyre, upright, rotor, caliper...) for our 2004 car is coming around 15 kgs.

just wanted to know what other teams achieve.

[ashish]

the weight of a wheel assembly (wheel, tyre, upright, rotor, caliper...) for our 2004 car is coming around 15 kgs.

just wanted to know what other teams achieve.

[All Wheeler]

Our wheel assemblies with everything included weighed just over 12kgs each. Small consellation when our whole car weighed 320kgs. Plenty of other places to lose weight. Better to go with a slightly heavier robust wheel assembly than something flimsy.

[Travis Garrison]

Just to play devil's advocate here....

<BLOCKQUOTE class="ip-ubbcode-quote"><font size="-1">quote:</font><HR> Better to go with a slightly heavier robust wheel assembly than something flimsy.<HR></BLOCKQUOTE>

...thats how you end up with a 320kg car http://fsae.com/groupee_common/emoticons/icon_smile.gif and the more "robust" parts you put on the car, the more robust they actually need to be to compensate for the increased weight/forces....

I think other teams are quoting something like 18 lbs for their wheel tire asm...which would be an 8lb savings per corner...and 32 lbs of unsprung weight is absolutely huge...That might be a perfect place to start if you're going to try to save weight.

Of course I understand the flip side is to get the thing finished and reliable first...something we haven't accomplished here yet.

Travis Garrison
WWU

[ben]

There is definitely a balance between robustness and reliability.

IMHO 320Kg is way too heavy. 250Kg is as robust as I'd want to be.

We were 224, Toronto 217 I think that's a really comfortable place to be on a spaceframe car.

Delft showed that 137 is way to far the other way.

Ben

University of Birmingham
www.ubracing.co.uk (http://www.ubracing.co.uk)

[Charlie]

I think 'All-wheeler's' estimate included uprights and other parts of the wheel assy.

When comparing masses, its probably best to leave the tire out of the equation, at least for comparison purposes. Used tires are a lot lighter than new tires, and even with new tires, there are big variances in mass. I've seen over 1 lb difference.

-Charlie Ping

I just need enough to tide me over until I need more.