H Class Rocket Motor

AeroTech H73J

AeroTech
Blackjack
Ø 38mm
Total Impulse
185.6Ns
Burn Time
2.55s
Avg Thrust
73.0N
Max Thrust
97.1N

Thrust Profile (N)

2.55s Burn Window

Engineered by AeroTech, the H73J is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official H-class motor, it delivers a total impulse of 185.6 Ns over a 2.55 second burn window.

With an average thrust of 73.0 N and a peak of 97.1 N, it features a neutral thrust curve optimal for general sport flying. It utilizes the Blackjack propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 152 mm
Hardware RMS-38/240
Delays (s) 4,6,8,10
Specific Impulse 132.6 s
Peak Thrust 94.64 N
Peak Time T+ 1.215s
T/W Ratio 24.07
Propellant Blackjack
Profile neutral
Type reload
Sparky No

Mass Budget

309.12g Total
Casing (Dry)
166.4g
53.8%
Propellant
142.7g
46.2%
Live Sizing
Flight Envelope

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Comparable H-Class Alternatives

H155F

Kosdon

H
dual-peak
Total: 161 Ns
Ø 29mm

H300-HP

Contrail

H
neutral
Total: 161 Ns
Ø 38mm

H222-HP

Contrail

H
regressive
Total: 161 Ns
Ø 38mm

H55W

AeroTech

H
regressive
Total: 162 Ns
Ø 29mm

163H133-14A

Cesaroni

H
dual-peak
Total: 163 Ns
Ø 29mm

164H90-12A

Cesaroni

H
dual-peak
Total: 164 Ns
Ø 29mm
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