H Class Rocket Motor

Cesaroni 247H143-13A

Cesaroni Technology
Smoky Sam
Ø 38mm
Total Impulse
247.0Ns
Burn Time
1.73s
Avg Thrust
142.4N
Max Thrust
167.0N

Thrust Profile (N)

1.73s Burn Window

Engineered by Cesaroni Technology, the 247H143-13A is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official H-class motor, it delivers a total impulse of 247.0 Ns over a 1.73 second burn window.

With an average thrust of 142.4 N and a peak of 167.0 N, it features a neutral thrust curve optimal for general sport flying. It utilizes the Smoky Sam propellant formulation, dictating its specific impulse and exhaust signature.

Technical Specifications

Canadian Association of Rocketry
Diameter 38 mm
Length 185 mm
Hardware Pro38-2G
Delays (s) 4,6,8,10,13
Specific Impulse 152.2 s
Peak Thrust 167 N
Peak Time T+ 1s
T/W Ratio 41.83
Propellant Smoky Sam
Profile neutral
Type reload
Sparky No

Mass Budget

347g Total
Casing (Dry)
181.6g
52.3%
Propellant
165.4g
47.7%
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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