axle size and material

[lyonsy]

what does axle size and material do in relation to handling?
ive been told that alloy axle's are stiffer then ive been told there simerlar to 30mm steel.
iam currently running 30mm steel and thinking of getting 30mm alloy, what can i expect the change too do?
what change would i expect if go to a 40mm alloy setup?

the chassis iam using is arrow ax6 junior

[CRacing]

an 30mm alloy is much lighter then the steel the 40mm alloy is lighter again because you can run hollow this will increase you speed out the corners
ie: you go faster
;D ;D

[__[Race Fan]__]

less rotating weight which means more acceleration as the engine doesn't have to move as much weight. means you go faster

take a good look around at the quick karts they all run 40mm alloy
that must mean somethink

[tom]

Not sure i agree on the rotating weight theory.. The aluminium axles are lighter but the weight is pretty close to the axis of rotation.

In my opinion the biggest effect the alloy axle will have is the damping effect over bumps where it will enable the tyre to have more contact with the track due to a softer damping (nothing to do with the "stiffness" of the axle).

A bit hard to explain but you can feel the kart skip less through the corners if you run an aluminium axle.

The axle is under constant deflection from the outer bearing hanger to the hub, but this deflection rotates through 360' with the rotation of the tyre. This means that for every turn of the rear wheel the axle deflects up and down (kind of like hanging a steel ruler off a bench and giving it a flick, it will continue to vibrate). The ability of the material to handle that vibration, and enable the tyre to stay in contact with the track is what makes different axles behave differently. (and hence be more or less suitable for different surfaces).

In AIDKA, at the moment, most people are using 40mm hollow aluminium.. In my opinion there is no comparible steel axle to this.

[lyonsy]

hey thanks for that.
so the 30mm alloy is a soild?
any extra hp would be welcome
less skipping would be very welcom as the wheelbase is a little on the short side.
plus there cheaper

this is for speedway but most things change over so.

[mike]

I think from memory you can still get 30mm solid axles. You can get them in hollow as well. Took one out of my old kart. Still sitting in the shed.

Tom I agree with you on the rotating weight. Really only makes a difference when the weight is further away from the axis (more drag and harmonics)

As for handling, sorry cant comment. Running a 40mm steel axle in mine (freebie)

[lyonsy]

has anyone ever used a 50mm?

[Admin]

According to the AIDKA rules you can't run a 30mm hollow axle.

[lyonsy]

thats ok for me iam running skaa atm i think there axle rule is having one optional but reconmended.

i dont know why they cant run hollow there generaly stronger then soild as it allows more deflection before actully bending

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