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chain diff
iceman26 - 1/10/10 at 05:44 PM

what are the advantages of chain drive over normal diff?

madteg - 1/10/10 at 06:07 PM

Chain diff is driven by a chain and normal diff id driven by a prop.

tomgregory2000 - 1/10/10 at 06:22 PM

depends where your engine is

blakep82 - 1/10/10 at 06:29 PM

yep, engines go different ways around

Minicooper - 1/10/10 at 06:29 PM

1:Light
2:Easy final drive ratio changes
3:Allows engine to be used in it's correct orientation

Can't think of anymore at the moment

Cheers
David

iceman26 - 1/10/10 at 06:53 PM

what is the recomended shortest run of chain you should have
and has ny one got any picturers of chain diff fitted
thanks

m8kwr - 1/10/10 at 07:04 PM

Look at the warner R4 LINK

I have one, but not fitted.

matt_gsxr - 1/10/10 at 07:39 PM

Chain length supposedly limited by temperature. I'd like to understand the mechanism of this a bit better.

But have never found anything I could get my teeth into.

blue2cv - 2/10/10 at 08:16 AM

If memory serves, when in discusion with Muffet Engineering a few years back, they were getting chain overheat probs when under 40 - 50 links used (cant remember exact number) had to rethink my design then and ended up using a Nova racing unit, which has a longer chain run, shame as the Muffet unit was very compact

MikeRJ - 2/10/10 at 08:47 AM

quote:
Originally posted by matt_gsxr
Chain length supposedly limited by temperature. I'd like to understand the mechanism of this a bit better.


The shorter the chain the more frequently each link has to articulate to go around the sprockets which generates heat. Couple this with lower mass and surface area with which to dissipate the heat and shorter chains end up running hotter.

The smaller the sprockets the more the heat and wear, which is why increasing the number of teeth on the rear sprocket of a bike is preferable to losing teeth off the front one.

Mark Allanson - 2/10/10 at 08:49 AM

Has anyone tried using a belt instead of a chain? I thing the big Harley Fergusons use them so heavy duty ones must be available.

cloudy - 2/10/10 at 10:37 AM

Here's a pic from early in my build, I wouldn't go much shorter than this - I think you'll have overheating issues as mentioned above...

chainlength
chainlength

blue2cv - 2/10/10 at 10:42 AM

I did look into belts too, again if mem serves couldnt find right combination of size and power handling for my set up

JF - 2/10/10 at 11:02 AM

Belts could be a nice option. But are harder to source and therefor might work out more expensive.

Chains and sprockets are plentifull in the bikeworld. And easy to adapt, you can make them to length relatively easy.

For belts you will more or less depending on the standard sizes avaible. pulleys are harder to source too, although they wear much less. So if you do get it sorted properly it will probably outlive the rest of the car.

Personaly I would look into using an aditional sprocket/pulley when designing such short drivetrains. To increase the wrap around the smallest sprocket. As more links will take the force, there should be significantly less wear on the chain and small sprocket (wich will always wear much faster then the larger one).

Although looking at cloudy's pic it might be hard fitting one in with his setup. A few cm might make all the differance though.

welderman - 6/10/10 at 08:36 AM

u2u sent

Joe