[thethirdone]

It does seem that friction in the bearing and tension of the wires is not sufficiently controlled for the physical demonstration to be convincing.

However, the mathematics of it seems to have already been confirmed by a previous paper and the actual idea of changing orientation without exchanging momentum with anything is not novel.

You can turn a satellite by spinning up a flywheel and then reabsorbing the angular momentum when you reach the desired orientation.

[6510]

> You can turn a satellite by spinning up a flywheel and then reabsorbing the angular momentum when you reach the desired orientation.

Wouldn't 2 of those allow for 2 different centers of rotation. If so, we can just walk though space.

:-)

[colanderman]

No, the center of rotation is always that of the full system. It's not relative to which flywheel happens to be spinning.