| 20090211225 | Systems and methods for varying the thrust of rocket motors and engines while maintaining higher efficiency using moveable plug nozzles - The thrust of a rocket motor can be varied to optimize Nozzle Pressure Ratio (NPR) using a design that allows for adjusting the relative position of a plug and a combustion chamber exit. The plug or the exit may be attached to an adaptive control system for position modification. The relative position of the plug and exit may be adjusted to optimize NPR to account for changing propellant flow and/or changing ambient pressure. | 08-27-2009 |
