Fin and nozzle unit for a free-flight rocket
US4203569A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1977 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Oct 17, 1997 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF42B10/30
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.