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blackshire
05-12-2012, 01:24 AM
Hello All,

Being rather enamored of ISRO's PSLV (Polar Satellite Launch Vehicle), especially the PSLV-CA ("Core Alone" version, see: http://en.wikipedia.org/wiki/Polar_Satellite_Launch_Vehicle ), I wonder if the current state of the art would enable us to use SITVC (Secondary Injection Thrust Vector Control) systems on scale models of such finless rockets? A SITVC system using air-pressurized water could be installed in such finless models. Also:

Electronically-actuated valves could control the injection of jets of water into the motor exhaust plume just below the nozzle to steer the model, *or* a simpler system could simply continuously inject four jets of water (spaced 90 degrees apart) inward and downward. Given enough water, the jets could continue to steer (or simply stabilize) the model during its coasting phase of flight while the motor's delay charge burns. In addition:

With the jets of water being injected into the hot motor exhaust plume, the resulting expansion of the heated water might enable a scale-size nozzle extension to be affixed below the motor's nozzle, for a realistic-looking nozzle *and* a "scale-width" exhaust plume. The water jet nozzles could be molded into (or investment-cast into) a phenolic scale nozzle extension.