Re: pic: Drivetrain Concept
 

Yeah, like a power slide.

Re: pic: Drivetrain Concept
 

If I'm not mistaken couldn't this also be a 4 speed shifter?

With the two ratios on the gearbox than then the two different ratios given on the wheel sizes and reductions (don't know if they are synced)....

Thats. Insane. I like it! :D

- Andrew

Re: pic: Drivetrain Concept
 

Just realized there was a mistake in the design concerning which Supershifter drove which side. A redesign is nessecary and taking place and should clear up some of the issues of the 2 transmissions. We are now attempting to link both front modules to one supershifter and both back modules to the other. Instead of the linking front and back on each side like it is now.

Re: pic: Drivetrain Concept
 

If I understand this right you're switching from this linkage:

<front>
o o
| |
o o

to this:

<front>
o-o

o-o

If that is the case you won't be able to turn.

Re: pic: Drivetrain Concept
 

good point :P which represents the reasoning behind having 4 gearboxes. You limit mobility if you restrict the ways you can turn if you link front and back together.

Re: pic: Drivetrain Concept
 

I don't get it. You obviously can't have both front wheels and both back wheels together, because both sides are always doing the same thing, and you therefore can't turn. Also, if you try to make the front wheels do something different from the back wheels, you will just shred your tread (at best).

You CAN however have each side on one gearbox, and as already stated many times, there's no reason not to. Standard tank turning is accomplished by running each side at different speeds (or even different directions).

Re: pic: Drivetrain Concept
 

yes it can be done and its a good approach and it is our fallback, but if you want to run traction in back and omni in front you can't have different ratios because the wheel size is different whereas if the the gearboxes are seperated the speeds themselves can be altered and allow for the two different wheel sizes to work together.

Re: pic: Drivetrain Concept
 

You can accommodate different wheel sizes driven off of the same gearbox by gearing the wheels at a ratio (to each other) equivalent to the ratios of the wheel sizes. For example, if you have a 4inch and an 8 inch wheel driven off of the same gearbox, by having a 1:1 sprocket ratio between the output and the 4 inch wheel and a 2:1 ratio between the output and the 8 inch wheel they will run at the same ground speed. It is usually lighter to uses different sprockets to accommodate the wheel size difference than to use different gearboxes for the different wheels.