Total Impulse
643.5Ns
Burn Time
2.62s
Avg Thrust
245.3N
Max Thrust
681.1N
Thrust Profile (N)
2.62s Burn WindowEngineered by Contrail Rockets, the J245-BG is a 54mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 643.5 Ns over a 2.62 second burn window.
With an average thrust of 245.3 N and a peak of 681.1 N, it features a regressive thrust curve optimal for heavy rockets requiring high off-the-pad acceleration.
Technical Specifications
Tripoli Rocketry Association, Inc.Diameter 54 mm
Length 719 mm
Hardware Single Use
Delays (s) P
Specific Impulse 145.8 s
Peak Thrust 444.82 N
Peak Time —
T/W Ratio 16.13
Propellant Standard
Profile regressive
Type hybrid
Sparky No
Mass Budget
1550g TotalCasing (Dry)
1100.0g
71.0%
Propellant
450.0g
29.0%
Live Sizing
Flight Envelope
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Install in Google Sheets coming soon Comparable J-Class Alternatives
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