(under subclass 51) Devices and arrangements in which the propelling agency is the movement of restricted masses or jets or air or other fluid.
SEE OR SEARCH CLASS
60, Power Plants,
228+, for reaction motors having means to modify the thrust direction.
239, Fluid Sprinkling, Spraying, and Diffusing,
127.1+, 265.23 and 265.33+ for discharge nozzles of reaction motors, disclosed on aircraft, and having means to vary the direction of fluid stream discharge for steering the craft. 440, Marine Propulsion,
38+, for reaction motors arranged to both propel and steer ships.
