J Class Rocket Motor

Loki J528-LW

Loki Research
Loki White
Ø 38mm
Total Impulse
741.0Ns
Burn Time
1.20s
Avg Thrust
528.0N
Max Thrust
896.0N

Thrust Profile (N)

1.20s Burn Window

Engineered by Loki Research, the J528-LW is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 741.0 Ns over a 1.20 second burn window.

With an average thrust of 528.0 N and a peak of 896.0 N, it features a regressive thrust curve optimal for general sport flying. It utilizes the Loki White propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 419 mm
Hardware 38/740
Delays (s) 5,8,10,13,17
Specific Impulse 202 s
Peak Thrust 1019 N
Peak Time T+ 0.02s
T/W Ratio 72.25
Propellant Loki White
Profile regressive
Type reload
Sparky No

Mass Budget

745g Total
Casing (Dry)
371.0g
49.8%
Propellant
374.0g
50.2%
Live Sizing
Flight Envelope

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Comparable J-Class Alternatives

644J94-P

Cesaroni

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regressive
Total: 644 Ns
Ø 38mm

J520F

KBA

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dual-peak
Total: 646 Ns
Ø 38mm

648J285-15A

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Total: 648 Ns
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J270

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Total: 649 Ns
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649J335-15A

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J
regressive
Total: 649 Ns
Ø 38mm

J396-SF

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neutral
Total: 650 Ns
Ø 38mm
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