抄録
The authors have been developing CAMUI (Cascaded Multistage Impinging-jet) type hybrid rockets, explosive-flee small rocket motors. This is to downsize the scale of suborbital flight experiments on space related technology development. To demonstrate flight performance of a newly developed 5000 N thrust class motor and accumulate flight data around the sonic speed, a launch test was conducted from a coast to the sea. Test results were successful and all of the fuselage was recovered. To obtain drag coefficient, we used flight data, histories of thrust and propellant flow rates obtained by the static firing test. A typical drag coefficient profile around the sonic speed was obtained.
