markt311 wrote:That looks really cool, pardon my ignorance, but I know nothing about crawlers. What is a dig?
I'm not sure how it got the name, but dig refers to disengaging the power from one axle while allowing the other axle to continue to propel the vehicle.
On a shaft driven vehicle like this it is the transfer case that can be shifted between 4wd, front wheel drive, and rear wheel drive, hence the need for the servo.
on dual motor vehicles like a clod, it is accomplished either by onboard electronics electronics/relays that cut power to one motor, or by having 2 seperate speed controls that are run from 2 channels on the radio so they can be controlled/mixed as needed.
I've not driven a dig equiped vehicle yet, but I believe it allows tighter turning. By letting just the front wheels have power with a locked rear axle you can get the tuck to turn/rotate with no forward movement.