Tsiolkovsky rocket equation
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whodarep08
For Tsiolkovsky Rocket equation fans:

Been having some fun making rocket launch scenerios upon learning this arithmatic, but i recently learned of a loop hole in my equations i've come up with concerning staged rocket launches.

If you are launching a rocket with boosters that have entirely different specific impulses and fire them off at the same time (example: Space Shuttle's main engines and SRBs that have Isps of 455s and 269 respectively), do you use one Specific Impulse, or both, or add them together before or after calculating the exhaust velocity?

Any thoughtful answer would be most apprechiated:)

WP8
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