To that end, it uses two small-sized motors connected together with a belt, which together power a friction drive which clamps against the rear tire to spin it directly. This keeps the weight ...

THE LAMBERT FRICTION DRIVE CHASSIS. (ConfiwMed from page 325.) driving disk. The paper-covered driven disk is slidably mounted upon a countershaft which is capable of being moved slightly forward ...

To that end, it uses two small-sized motors connected together with a belt, which together power a friction drive which clamps against the rear tire to spin it directly. This keeps the weight ...