I Class Rocket Motor

AeroTech I225FJ

AeroTech
Black Max
Ø 38mm
Total Impulse
367.9Ns
Burn Time
1.59s
Avg Thrust
230.5N
Max Thrust
276.6N

Thrust Profile (N)

1.59s Burn Window

Engineered by AeroTech, the I225FJ is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official I-class motor, it delivers a total impulse of 367.9 Ns over a 1.59 second burn window.

With an average thrust of 230.5 N and a peak of 276.6 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 240 mm
Hardware RMS-38/480
Delays (s) 4,6,8,10
Specific Impulse 142.1 s
Peak Thrust 275.9 N
Peak Time T+ 0.8s
T/W Ratio 48.35
Propellant Black Max
Profile neutral
Type reload
Sparky No

Mass Budget

486g Total
Casing (Dry)
222.0g
45.7%
Propellant
264.0g
54.3%
Live Sizing
Flight Envelope

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Comparable I-Class Alternatives

I235WC

Gorilla

I
No Curve Data
Total: 324 Ns
Ø 38mm

I200W

AeroTech

I
regressive
Total: 325 Ns
Ø 29mm

I180W

AeroTech

I
dual-peak
Total: 326 Ns
Ø 38mm

I385F

Kosdon

I
No Curve Data
Total: 326 Ns
Ø 29mm

I223GT

Gorilla

I
neutral
Total: 328 Ns
Ø 38mm

I161W

AeroTech

I
dual-peak
Total: 329 Ns
Ø 38mm
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