| 摘要 |
A propulsion device for exerting a propulsive force on a vehicle generates an impulse of momentum by a piston of non-zero mass, an acceleration produced by a force acting on a structure of the vehicle and the braking produced in isolation inside the propulsion device without any force being applied to the vehicle. The piston moves inside a cross-shaped cavity from a reference position to an end of a cylindrical part of the cavity where it is stopped by a gas that it compresses adiabatically. The cross-shaped cavity is rotated by a quarter turn before the piston is released to return to the reference position. The propulsion device can comprise two cross-shaped cavities rotating in opposite directions. |
