BANGALORE: The Indian Space Research Organization (ISRO) launched earlier this month Rohini sound rocket (RH200) with a new propellant formulation based on hydroxyl-depleted polybutadine (HTPB) Thumba Equatorial Rocket Launching Station (TERLS) at the Vikram Sara Bhai Space Center (VSSC).
He said it was the 180th successful flight of the RH200 (meteorological) sound rocket and the first flight with HTPB-based propellant. The mission achieved an altitude of 623 km in 123 seconds compared to the nominal estimate of 60.6 km and successfully released the fall payload. The performance of the motor was normal, ISRO said.
India began its space journey on November 21, 1963 with the launch of the TERLS by launching the first Bond rocket from Indian soil. Then on November 21, 1967, the first Indian-made rocket, the RH75, was successfully launched.
“Over the years, ISRO has developed various sound rockets for various scientific experiments and meteorological studies. ISRO added that at present RH200, RH300MKI and RH560MK3.
The first and second stages of the RH200 rocket run solid motors. Since the launch of the RH200 rocket, both solid phases have been processed using polyvinyl chloride (PVC) based propellants.
“Compared to PVC-based propellants, HTPB-based propellants are more energetic with more mechanical and interface properties and have fewer defects due to lower processing temperatures,” ISRO said.
The space agency added that efforts were being made to replace them with these benefits in mind PVC based propellant HTPB-based propellants and tests were carried out on the RH200 rocket to achieve the desired properties. In addition, composite paper tube-based insulation has been applied to enhance the interface properties and stiffness with HTPB Propellant.
“Before the first flight, the performance of the RH200 stages was verified by performing four static tests for the first stage and two static tests for the second stage,” ISRO said.
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