J Class Rocket Motor

AeroTech J575FJ

AeroTech
Black Max
Ø 38mm
Total Impulse
798.1Ns
Burn Time
1.34s
Avg Thrust
594.0N
Max Thrust
839.5N

Thrust Profile (N)

1.34s Burn Window

Engineered by AeroTech, the J575FJ is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 798.1 Ns over a 1.34 second burn window.

With an average thrust of 594.0 N and a peak of 839.5 N, it features a regressive thrust curve optimal for general sport flying. It utilizes the Black Max propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 478 mm
Hardware RMS-38/1080
Delays (s) 4,6,8,10
Specific Impulse 141.2 s
Peak Thrust 840.69 N
Peak Time T+ 0.02s
T/W Ratio 66.24
Propellant Black Max
Profile regressive
Type reload
Sparky No

Mass Budget

914g Total
Casing (Dry)
338.0g
37.0%
Propellant
576.0g
63.0%
Live Sizing
Flight Envelope

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