The entry of robots in the local has not been free of friction.

All inertial propulsion systems—to my knowledge—never worked in a friction-free environment," he is quoted as saying

All inertial propulsion systems – to my knowledge – never worked in a friction-free environment,” he says.

All inertial propulsion systems - to my knowledge - never worked in a friction-free environment," he says.

Since light applies pressure to surfaces, the stream of photons can be used for propulsion in a near-frictionless environment.

A magnetic power system for transporting charges without friction includes at least one magnet (1) secured to the charge (7) and cooperating with a ferromagnetic profiled carrier (2).