What is the "Structure of PSLV made by ISRO"......!
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Both PSLV (Polar Satellite Launch Vehicle) and GSLV (Geosynchronous Satellite Launch Vehicle) are the satellite-launch vehicles (rockets) developed by ISRO. ... PSLV is a four-staged launch vehicle with first and third stage using solid rocket motors and second and fourth stages using liquid rocket engines
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Explanation:
It uses the S139 solid rocket booster that contains 138 tonnes of HTPB. While the PSLV-G uses 6 HTPB based solid strap-on motors of 9 tonnes each and PSLV-XL uses 6 extended strap-ons of 12 tonnes each, the PSLV-CA (core alone version) does not use any strap-on motors.
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