We have to excess two large 3 axis airbearing simulators. One is about 5' tall and supports a dumbbell shaped satellite simulator that is about 4 feet across. The other is a 4' diameter disk that has all the same attitude control stuff. It is shown here: http://aprs.org/labsats/PLATSAT-210xx.jpg

The Dumbell one is similar to this one I found on line, except ours does not have the two rectangular plates on the end. Just the air bearing and the arm and two disks. It is complete since the disks contain large reaction wheels in all three axis and a set of 6 cold gas thrusters from a compressed air tank.

https://www.researchgate.net/profile/Christopher_Hall13/publication/254875 116/figure/fig8/AS:393203330109448@1470758387741/University-of-Michigans-T riaxial-Air-Bearing-Testbed-51-payloads-with-soft-well-damped.jpg

The dumbbell one cleary has a larger 3D range of motion since the bulk of the attitude control stuff is away from the bearing and will not run into the support bearing as soon.

Consider these have NO working processor on board. We got them surpluss with the idea of using an Arduino controller instead of the huge PC it originally had 2 decades ago.

They must go by May 1 by donation to a legitimate academic institution willing to do the paperwork and come get it in the ANNAPOLIS MARYLAND area.

They are big and bulky, but are precision instruments.

Just a thought.

Bob Bruninga US Naval Academy 410-293-6417