Inertioid

Inetrioid (Инерциоид) is device claimed to violate the law of conservation of momentum. The idea such a device, id est, the inertial propulsion, is advertciced in various countries since baron Munchausen; for the beginning of century 21, the most known inertioids are the Dean Drive (USA)

and Gravitsapa developed in the Khrunichev State Research and Production Space Center‎ (Russia) under directorship of Vladimir Nesterov (Нестеров Владимир Евгеньевич); the branch dedicated to invention, optimization and production of inertioids is called Maximov Space Systems Research Institute, the director is Valery Menshikov (Меньшиков Валерий Александрович) .

The principle of relativity of motion does not allow to violate conservation of momentum at the conservation of energy. In this sense, any inertioid is an equivalent of the perpetual motion machine .