J Class Rocket Motor

KBA J520F

Kosdon by AeroTech
Kosdon Fast
Ø 38mm
Total Impulse
645.9Ns
Burn Time
1.22s
Avg Thrust
525.5N
Max Thrust
683.6N

Thrust Profile (N)

1.22s Burn Window

Engineered by Kosdon by AeroTech, the J520F is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 645.9 Ns over a 1.22 second burn window.

With an average thrust of 525.5 N and a peak of 683.6 N, it features a dual-peak thrust curve optimal for general sport flying. It utilizes the Kosdon Fast propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 368 mm
Hardware Kosdon 38-640
Delays (s) 14
Specific Impulse 201.4 s
Peak Thrust 737.09 N
Peak Time T+ 0.031s
T/W Ratio 74.19
Propellant Kosdon Fast
Profile dual-peak
Type reload
Sparky No

Mass Budget

722g Total
Casing (Dry)
395.0g
54.7%
Propellant
327.0g
45.3%
Live Sizing
Flight Envelope

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