[n1ckd2012]

Originally Posted by MICHAELABICK

1/16 is probably not enough drop on an 8wd. You actually want more drop on an 8wd than on a 6wd. 12fps seems a bit low for a 2 speed drivetrain(what efficiency is this). Usually you want to gear a bit faster to take advantage of the 2 speeds. Also that lightening pattern looks hard to do. It's a lot better to make the lightening pattern out of round holes because it is easier/faster for the shop.

Vex does provide an alternate gear set for the ball shifter at a slightly faster ratio. Our numbers do not take effiency into account. Still need to run the various ratios through the JVN spreadsheet.

Alternatively we might use this 3 motor gearbox:
http://www.vexrobotics.com/vexpro/ge...reduction.html

More specs:

The wheels are 6x1.5" colons with WCP live and dead hubs.
The tensioners are HPDE rods. You twist them to vary the tension.
Chassis is 27x33 in long configuration.
The braking method is borrowed fr 1477's 2012 robot.