J Class Rocket Motor

AeroTech J401FJ

AeroTech
Black Max
Ø 54mm
Total Impulse
1115.4Ns
Burn Time
2.80s
Avg Thrust
408.9N
Max Thrust
480.0N

Thrust Profile (N)

2.80s Burn Window

Engineered by AeroTech, the J401FJ is a 54mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 1115.4 Ns over a 2.80 second burn window.

With an average thrust of 408.9 N and a peak of 480.0 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 54 mm
Length 325 mm
Hardware RMS-54/1280
Delays (s) 6,8,10,12,14
Specific Impulse 222.5 s
Peak Thrust 488.1 N
Peak Time T+ 0.022s
T/W Ratio 45.7
Propellant Black Max
Profile regressive
Type reload
Sparky No

Mass Budget

912g Total
Casing (Dry)
401.0g
44.0%
Propellant
511.0g
56.0%
Live Sizing
Flight Envelope

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