초록 ▼

The disclosed fin and nozzle unit comprises a generally cylindrical nozzle body having an axial nozzle opening therein for discharging a gaseous propulsion stream, a plurality of fins having pivot means mounting such fins on a rear end portion of the nozzle body for swinging movement between retract

The disclosed fin and nozzle unit comprises a generally cylindrical nozzle body having an axial nozzle opening therein for discharging a gaseous propulsion stream, a plurality of fins having pivot means mounting such fins on a rear end portion of the nozzle body for swinging movement between retracted launch positions and extended flight positions in which such fins are swung outwardly from the launch positions through a predetermined angle, such fins having bent or skewed portions which are positioned in the gaseous propulsion stream when the fins are in their retracted launch positions for causing the gaseous propulsion stream to act upon the bent portions so as to produce spinning movement of the rocket when it is being launched, the bent portions being movable outwardly out of the gaseous propulsion stream when the fins are swung outwardly into their extended flight positions to avoid imparting further spin to the rocket during flight. The fins preferably have a conformation which is aerodynamically neutral when the fins are in their extended flight positions. To such end, each fin is preferably bent along a line which is parallel to the axis of the nozzle body when the fin is extended. Detent elements are preferably resiliently biased against detent cams on the fins to hold the fins in their extended flight position. The detent elements also preferably hold additional fin members in their retracted launch position until the first mentioned fins swing outwardly to their flight positions, whereupon the additional fin members are released by said detent elements and are swung outwardly to their extended flight positions by spring means.

대표청구항 ▼

A fin and nozzle unit for a rocket, comprising a generally cylindrical nozzle body having rearwardly directed nozzle means thereon for discharging propulsion gases, said nozzle body having a rear end portion, a plurality of fins, and pivot means swingably mounting said fins on said rear end portion

A fin and nozzle unit for a rocket, comprising a generally cylindrical nozzle body having rearwardly directed nozzle means thereon for discharging propulsion gases, said nozzle body having a rear end portion, a plurality of fins, and pivot means swingably mounting said fins on said rear end portion of said body for swinging movement between retracted launch positions and extended flight positions in which said fins are swung outwardly from said launch positions through a predetermined angle, said fins having skewed portions which are positioned opposite said nozzle means and in paths traversed by said propulsion gases when said fins are in said retracted launch positions for causing said propulsion gases to act upon said skewed portions to produce spinning movement of the rocket, said skewed portions being carried outwardly out of said propulsion gases when said fins are swung outwardly into said extended flight positions to avoid imparting further spin to the rocket when said fins are in said extended flight positions, said skewed portions being bent about bend lines which are substantially parallel with the longitudinal axis of said nozzle body when said fins are in their extended flight positions whereby said fins are aerodynamically neutral when in said extended flight positions to avoid imparting further spin to the rocket.