What does Specific Impulse ($I_{sp}$) primarily measure in rocket performance?

Answer

How efficiently a rocket converts propellant mass into thrust over time

Specific Impulse measures how efficiently a rocket converts propellant mass into thrust over time, which is directly analogous to fuel efficiency metrics like miles per gallon.

What does Specific Impulse ($I_{sp}$) primarily measure in rocket performance?

#Videos

Rocket Science for Everyone with Yale's Marla Geha - YouTube

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