Total Impulse
1115.3Ns
Burn Time
5.00s
Avg Thrust
228.0N
Max Thrust
616.0N
Thrust Profile (N)
5.00s Burn WindowEngineered by Ellis Mountain, the J228 is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 1115.3 Ns over a 5.00 second burn window.
With an average thrust of 228.0 N and a peak of 616.0 N, it features a regressive thrust curve optimal for heavy rockets requiring high off-the-pad acceleration.
Technical Specifications
Tripoli Rocketry Association, Inc.Diameter 38 mm
Length 562 mm
Hardware SU 38x562
Delays (s) P
Specific Impulse 199.8 s
Peak Thrust 665.03 N
Peak Time T+ 0.031s
T/W Ratio 27.7
Propellant Standard
Profile regressive
Type SU
Sparky No
Mass Budget
839g TotalCasing (Dry)
270.0g
32.2%
Propellant
569.0g
67.8%
Live Sizing
Flight Envelope
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Comparable J-Class Alternatives
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