Axles and torque

[aol000xw]

So I was daydreaming at work and some doubts came to mind...

Proper bracing and appropiate gears can avoid grinding and broken parts but how much torque can be applied to an axle before it starts deforming? What happens first broken gears or axle fatigue?

I know some people reinforce them with half bushes; how effective is that? what happens to the axle sections across beams?

Sometimes a vehicle with a good drivetrain and enough grip can get stuck with the motors stalled, what does it take for the axles to become spirals? How many XL motors at 1:1 does it take to achieve that...

Well I guess you get the point...

[Zerobricks]

Its usually like this from my experinces. The longer and the less reinforced with bushes the axle the easyer it is to deform it. Also usually bewel gears (especially 12 ttoth ones) slip before axle breaks, but a normal gear may survive and the axle may wind up so many times that the gears simply slides out like a screw.

To keep good high torque apps, keep the gearing as close to wheels as possible, meaning keep the high torque stuff close to high gear ratios, and keep it simple with low number of gears, especially bewels and U joints.

[Milan]

On some event few years ago, when XL motor just appeared, guys used XL motor and put 12L axle into it, and fixed the other end of the axle, so it cant spin. They turned on the XL and the axle broke.

If the bracing is very good, motors would just stall, no matter how many gears you have. Even Ujoints can survive lots of action.

[Aris]

From my experiments, I noticed that the maximum torque applied before an axle starts being twisted is when you have the torque of a large pf motor geared down 9 times(1:9 gear ratio),if this is what you mean.

[Zerobricks]

From my experiments, I noticed that the maximum torque applied before an axle starts being twisted is when you have the torque of a large pf motor geared down 9 times(1:9 gear ratio),if this is what you mean.

L motor?

[Aris]

Yes.The amount of torque coming from this gear ratio with L motor, is aprroximately equal to the limit of axle twisting.

[Tommy Styrvoky]

well i have never had axles wind up too much but a XL motor will shred single bevel gears without a problem.

[aol000xw]

From my experiments, I noticed that the maximum torque applied before an axle starts being twisted is when you have the torque of a large pf motor geared down 9 times(1:9 gear ratio),if this is what you mean.

I was trying to figure something like that , thanks

[TheItalianBrick]

A good trick could be to fix the XL motors with some shock absorber in order to let the torque be dissipated trough the springs. that means you are not loosing power, you are simply releasing it in a different way! it may save your axles from twisting.