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Originally Posted by maxlobovsky
Interesting, but if you are going to have castor supports, why not just have two independtly steerable and powered wheels in the middle and save yourself the trouble of the differential. BTW, if you dont balance your weight carefully, castors can be a real problem because they reduce weight on drive wheels and therefore traction.
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To solve teh weight distibution problem all you would have to do is offset the castors at a slightly different level as the castors.
Really neat idea. Seems that it would be easier to produce that a crab drive is too.
-Pat