Aerospace Engineering > GATE 2016 > Rocket Propulsion
A launch vehicle has a main rocket engine with two identical strap-on motors, all of which fire simultaneously during the operation. The main engine delivers a thrust of 6300 kN with a specific impulse of 428 s. Each strap-on motor delivers a thrust of 12000 kN with specific impulse of 292 s. The acceleration due to gravity is 9.81 m/s2 The effective (combined) specific impulse of the vehicle is _______ S.
Correct : 310:315
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