Comment by shkkmo

> this utilizes moving a large amount of air in the direction opposite to the road.

False.

The air from the fans is ejected out of rear of the vehicle, not the top. The kinetic energy of that air is neglible at best. The vehicle uses retractible fairings to create a partial seal and the fans create a low pressure zone inside the zone that holds the vehicle to road.

The cold gas thrusters are a completely different system that expels high pressurized air from canisters in the vehicle.