J Class Rocket Motor

Loki J650-SF

Loki Research
Spitfire
Ø 38mm
Total Impulse
942.0Ns
Burn Time
1.45s
Avg Thrust
648.0N
Max Thrust
974.0N

Thrust Profile (N)

1.45s Burn Window

Engineered by Loki Research, the J650-SF is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 942.0 Ns over a 1.45 second burn window.

With an average thrust of 648.0 N and a peak of 974.0 N, it features a neutral thrust curve optimal for general sport flying. It utilizes the Spitfire propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 625 mm
Hardware 38/1200
Delays (s) P
Specific Impulse 167.6 s
Peak Thrust 923.48 N
Peak Time T+ 1s
T/W Ratio 57.79
Propellant Spitfire
Profile neutral
Type reload
Sparky Yes

Mass Budget

1143g Total
Casing (Dry)
570.0g
49.9%
Propellant
573.0g
50.1%
Live Sizing
Flight Envelope

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