J Class Rocket Motor

Cesaroni 660J381-15A

Cesaroni Technology
Skidmark
Ø 38mm
Total Impulse
659.9Ns
Burn Time
1.63s
Avg Thrust
380.6N
Max Thrust
503.1N

Thrust Profile (N)

1.63s Burn Window

Engineered by Cesaroni Technology, the 660J381-15A is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 659.9 Ns over a 1.63 second burn window.

With an average thrust of 380.6 N and a peak of 503.1 N, it features a regressive thrust curve optimal for general sport flying. It utilizes the Skidmark propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 419 mm
Hardware Pro38-6G
Delays (s) 6,8,10,12,15
Specific Impulse 169.9 s
Peak Thrust 505.03 N
Peak Time T+ 0.048s
T/W Ratio 56.39
Propellant Skidmark
Profile regressive
Type reload
Sparky Yes

Mass Budget

688g Total
Casing (Dry)
292.0g
42.4%
Propellant
396.0g
57.6%
Live Sizing
Flight Envelope

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