Total Impulse
1833.0Ns
Burn Time
2.60s
Avg Thrust
695.0N
Max Thrust
1908.0N
Thrust Profile (N)
2.60s Burn WindowEngineered by Contrail Rockets, the K777-SP is a 75mm solid rocket motor designed for high-power rocketry (HPR). As an official K-class motor, it delivers a total impulse of 1833.0 Ns over a 2.60 second burn window.
With an average thrust of 695.0 N and a peak of 1908.0 N, it features a neutral thrust curve optimal for heavy rockets requiring high off-the-pad acceleration.
Technical Specifications
Tripoli Rocketry Association, Inc.Diameter 75 mm
Length 1016 mm
Hardware 75 40 M SP (2050CC)
Delays (s) P
Specific Impulse 289.7 s
Peak Thrust 1793.08 N
Peak Time T+ 0.112s
T/W Ratio 17.49
Propellant Standard
Profile neutral
Type hybrid
Sparky No
Mass Budget
4050g TotalCasing (Dry)
3405.0g
84.1%
Propellant
645.0g
15.9%
Live Sizing
Flight Envelope
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Comparable K-Class Alternatives
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