(...) Well, an adder/subtractor (a/s) *does* turn both treads evenly, but only with one motor driving. (...) An a/s does this when the drive motor is stopped and *the other* motor turns. (...) Controlled by the speed / direction of "turning" motor. (...) (22 years ago, 16-Aug-02, to lugnet.technic)
Beleive me, I have exampined the Lugnet technic gears site and been to all the links. I've also done other searches both on tank creations and on RCX bases using treads. I've recently bought 4 packs of tread links to make a large crawler base for my (...) (22 years ago, 16-Aug-02, to lugnet.technic)
