EXTENSIBLE NOZZLE FOR ROCKET ENGINE Russian patent published in 2002 - IPC

FIELD: rocketry. SUBSTANCE: extensible nozzle has stationary part, movable heads, head centering mechanism and cylindrical envelopes inside each head with releasing mechanisms; U-shaped ring mounted inside each head on side of lesser and is movable and flexibly compressed in axial direction; U-shaped ring is engageable with cylindrical section of movable head on one side and with inner side of cylindrical envelope on inner side; cylindrical envelope has profiled circular projection on its outer surface at point of contact of U-shaped ring with this envelope; this projection is received by respective circular slot in movable head; cylindrical envelope has meridional cuts on side of lesser end of head. High accuracy of connection of movable heads does not depend on ovality and ellipticity of mounting seats. EFFECT: enhanced accuracy of connection; reduced mass of nozzle and maximum rigidly of connection. 2 cl, 4 dwg