K Class Rocket Motor

AeroTech K513FJ

AeroTech
Black Max
Ø 54mm
Total Impulse
1496.3Ns
Burn Time
2.79s
Avg Thrust
556.8N
Max Thrust
658.3N

Thrust Profile (N)

2.79s Burn Window

Engineered by AeroTech, the K513FJ is a 54mm solid rocket motor designed for high-power rocketry (HPR). As an official K-class motor, it delivers a total impulse of 1496.3 Ns over a 2.79 second burn window.

With an average thrust of 556.8 N and a peak of 658.3 N, it features a dual-peak 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 410 mm
Hardware RMS-54/1706
Delays (s) 6,8,10,12,14
Specific Impulse 156.6 s
Peak Thrust 656.02 N
Peak Time T+ 1.328s
T/W Ratio 34.46
Propellant Black Max
Profile dual-peak
Type reload
Sparky No

Mass Budget

1647g Total
Casing (Dry)
673.0g
40.9%
Propellant
974.0g
59.1%
Live Sizing
Flight Envelope

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Comparable K-Class Alternatives

1176K1720-P

AMW

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dual-peak
Total: 1176 Ns
Ø 54mm

1281K360-13A

Cesaroni

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K456DM

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835CC125J-K240

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regressive
Total: 1292 Ns
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SK-54-1750

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K
neutral
Total: 1300 Ns
Ø 54mm

K400C

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K
regressive
Total: 1304 Ns
Ø 54mm
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