I Class Rocket Motor

Contrail I307-HP

Contrail Rockets
Unknown
Ø 38mm
Total Impulse
573.0Ns
Burn Time
1.85s
Avg Thrust
308.0N
Max Thrust
777.0N

Thrust Profile (N)

1.85s Burn Window

Engineered by Contrail Rockets, the I307-HP is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official I-class motor, it delivers a total impulse of 573.0 Ns over a 1.85 second burn window.

With an average thrust of 308.0 N and a peak of 777.0 N, it features a dual-peak thrust curve optimal for heavy rockets requiring high off-the-pad acceleration.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 922 mm
Hardware 38 36 F HP (460CC)
Delays (s) P
Specific Impulse 531 s
Peak Thrust 717.23 N
Peak Time T+ 0.199s
T/W Ratio 38.76
Propellant Standard
Profile dual-peak
Type hybrid
Sparky No

Mass Budget

810g Total
Casing (Dry)
700.0g
86.4%
Propellant
110.0g
13.6%
Live Sizing
Flight Envelope

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Comparable I-Class Alternatives

I235WC

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I200W

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I180W

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I385F

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I223GT

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I161W

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