CV Joints...

[MikeWaggoner at UW]

Anyone running something other than VW CV's? Anyone running splined CV'S-if so, how are you transmitting power? We've been volkswagen CV's and a U-joint (U-joint is slightly lighter, but isn't constant velocity) but we're probably going to dual CV since the judges didn't like having one true constant velocity joint (for plunge) and one U-joint.

Western Washington University FSAE
dot.etec.wwu.edu/fsae

[Denny Trimble]

We've been using chevy sprint CV's and hubs for the last... ever. If you do the analysis, you can lighten them up a little bit.

Also, funny as it is, there was a "Sprint Turbo" with bigger drivetrain components.

University of Washington Formula SAE ('98, '99, '03)

[-Gabriel]

Check for All Terrain Vehicles drivetrain components too. We have used them for 2 or 3 years without any problem. We mix Bombardier's CV joints with Honda Hubs and machined splined shafts. Works well and this year we switch to Kawasaki'CV joints (a matter of disponibility), seems to be pretty much standard!

Gabriel Denoury
Formule SAE Ecole Polytechnique de Montréal
www.fsae.polymtl.ca (http://www.fsae.polymtl.ca)

[Cats]

Geo Metro's are pretty nice, we've used them for the past 5 yrs or so. Go to the local junkyard and grab the hub, spindle, & halfshafts. Then do some cutting and pasting then you would be ready to run. I've also heard that CRV's will work too.

[Travis Townsley]

I know that this will be taken as a sales pitch, but I wanted to give you some more ideas for cv joints.

Every year, more and more FSAE teams have been getting their driveline components from us. We are Taylor Race Engineering (http://www.taylor-race.com) , a company that specializes in driveline components for race cars. Our background and most of our products are geared towards the open wheel race car.

This link (http://www.taylor-race.com/pdf/ACFD0C.pdf) will display a file in .pdf format detailing a very small tripod joint, housing, boot, and gun drilled axles that are suitable for use on a FSAE car. You can also find technical drawings (http://www.taylor-race.com/pdf/ACF319.pdf) on some of the other cv joints and axles that we carry.

I apologize if anyone is offended by my sales pitch on this forum, but I thought it would be helpful letting you know that there are specialized parts and specialized suppliers out there.

Travis Townsley
travis@taylor-race.com

[Cats]

We are using the Taylor stuff this year. I think we estimated it would save us 4-5 lbs. So we found it cost effective to save some time and weight.

dan

[Nigel Lavers]

We also used the Taylor RAce CV's and tripods. It is an incredibly light and simple system to setup... I believe that it saved us upwards of 6 lbs from our previous drivetrain.

Thumbs up to Taylor Race! /infopop/emoticons/icon_biggrin.gif

[ben]

We use the tripods off the new BMW mini (a GKN part) and machine our own outer carrier.

If you can't do that those Taylor parts look great, because to be fair, EDM/Wire eroding ain't cheap.

Ben
UBRacing

[Dominic Venieri]

We are using the taylor tripod bearings in our own machined housings, and our own axles. We saved about 8 lbs off the taylor setup we used the year prior.

www.formularpi.com (http://www.formularpi.com)

[Travis Townsley]

It looks as if many of you are already aware of the products that we offer for the FSAE car.

The weight of one complete axle (2 per car) with tripods, housings, boots, and 18" axle is only 4# 14.2oz

The weights, details, and prices of the pieces can be found at this link (http://www.taylor-race.com/pdf/ACFD0C.pdf)

Thanks,
Travis Townsley
travis@taylor-race.com

[Dominic Venieri]

I should mention that we were not using the Taylor axles, and our lengths are more than 18". We still did save a lot of weight over the Taylor housings however with our own.

www.formularpi.com (http://www.formularpi.com)

[MikeWaggoner at UW]

I noticed Lancaster says something about composite CV's at competition. Anyone know anything about this?

"Lancaster introduced composite CV joints to Formula Student, which have since been developed for World Rally Cars."

where:
http://www.comp.lancs.ac.uk/engineering/lancaster-racing/2002/FS%20at%20LANCASTER.htm

Western Washington University FSAE
dot.etec.wwu.edu/fsae

[ben]

Lancaster use a GKN flexible disc coupling. They were originally developed by GKN as flexible drives between the engines and main gearbox of helicopters, and have since been used as flexible couplings in propshafts (the WRC thing).

Lancaster have had to use two discs back to back to acheive the desired angulation which seems overly complex vs. a tripode. The things were never designed for driveshafts and I wouldn't use them there personally.

Ben

[Travis Garrison]

Dominic Venieri, I'm curious how you made your CV housings...if you don't mind telling that is...We're interested in doing the same sort of thing this year with our CV's...

Travis Garrison
WWU

[Dominic Venieri]

check your email

www.formularpi.com (http://www.formularpi.com)

[Abbiebrown73]

The weight of one complete axle (2 per car) with tripods, housings, boots, and 18" axle is only 4# 14.2oz


hmm this is interesting

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