Questions about specific impulse (Isp), which is a comparative measure of efficiency of rocket, jet engines and used propellants, measured either in seconds of thrust per unit weight of propellants, or effective exhaust velocity (thrust per unit mass of propellants) as a measure of launcher system's specific energy efficiency.
Questions tagged [specific-impulse]
75 questions
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Averaging Specific Impulse for combined propulsion
How would one go about calculating ISp of a rocket with combined propulsion? E.g. the Space Shuttle during the phase of launch, with both SRBs and SSME active?
Of course there's the simple "experimental" method, taking wet and dry mass, and speed at…
SF.
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A question about $I_{s}=\frac{F}{\dot{w}}=\frac{c}{g}$ with an example
I'm new to rocket propulsion elements and I'm reading Rocket Propulsion Elements by George P. Sutton, 4th Edition.
In the second chapter, it introduced me the following expression,
$$I_{s}=\frac{F}{\dot{w}}=\frac{c}{g}$$
$I_{s}: \text{Specific…
M. Çağlar TUFAN
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How do I get Specific impulse in (s) from (N * s/kg)?
Gross mass 19.32 tonnes
Thrust 1,260 kN
Specific impulse 2314 N·s/kg
How do I get Specific impulse in (s) ?
Justin808
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