I Class Rocket Motor

AeroTech I305FJ

AeroTech
Black Max
Ø 38mm
Total Impulse
452.1Ns
Burn Time
1.44s
Avg Thrust
313.5N
Max Thrust
418.2N

Thrust Profile (N)

1.44s Burn Window

Engineered by AeroTech, the I305FJ is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official I-class motor, it delivers a total impulse of 452.1 Ns over a 1.44 second burn window.

With an average thrust of 313.5 N and a peak of 418.2 N, it features a neutral 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 38 mm
Length 288 mm
Hardware RMS-38/600
Delays (s) 4,6,8,10
Specific Impulse 139.7 s
Peak Thrust 405.66 N
Peak Time T+ 0.4s
T/W Ratio 55
Propellant Black Max
Profile neutral
Type reload
Sparky No

Mass Budget

581g Total
Casing (Dry)
251.0g
43.2%
Propellant
330.0g
56.8%
Live Sizing
Flight Envelope

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Comparable I-Class Alternatives

I235WC

Gorilla

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No Curve Data
Total: 324 Ns
Ø 38mm

I200W

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regressive
Total: 325 Ns
Ø 29mm

I180W

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I
dual-peak
Total: 326 Ns
Ø 38mm

I385F

Kosdon

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No Curve Data
Total: 326 Ns
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I223GT

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I
neutral
Total: 328 Ns
Ø 38mm

I161W

AeroTech

I
dual-peak
Total: 329 Ns
Ø 38mm
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