the system uses one electrical motor in front/behind each wheel mounted to the chassis.
You can then manually or automatically engange some steel roles to the tyres. The are pressing towards the tyres with up to 500 pounds of pressure.
The enginge are then powered by the onboard battery and controled with a wireless remote controll.
Converts your Airstream in something like a hughe remote control toy ;-)
here is a demonstration video with a white box and another Reich Mover type....
An Airstream one with the new compact mover sytem will follow soon as we just did an advertisement with the manufacturer of the drives.