विशिष्ट आवेग कैलकुलेटर — सूत्र

Specific Impulse

Specific impulse (Isp) measures rocket engine efficiency: how much thrust per unit weight of propellant consumed per second.

Isp = ve / g0

*ve* = effective exhaust velocity (m/s)

*g0* = 9.80665 m/s2 (standard gravity)

Higher Isp means more efficient use of propellant. Chemical engines: 200-450 s. Ion engines: 1500-5000 s.

Engine with exhaust velocity 3000 m/s.