You'll have a very hard time making a ball-and-socket design bear a load and turn without lots of friction. Putting wheels between the ball and the socket just brings us back to the problem that we were trying to avoid by not having wheels. A much (...) (25 years ago, 3-Aug-99, to lugnet.robotics)
Here's a couple of short motion clips of the killough platform in motion. (about 1.4 MB each in mpg format) I had been waiting to get a few really nice movies of this but a relative of mine dropped by last weekend and shot these to show a friend of (...) (25 years ago, 4-Aug-99, to lugnet.robotics)
I was asked via E-mail where to get the balloon tyres. They are listed in the Shop-at-Home catalog as item 5282: (URL) just ordered some from here in the United States and they were $6.00 per package. Each package includes two tyres and two wheels (...) (25 years ago, 4-Aug-99, to lugnet.robotics)