I Class Rocket Motor

Ellis I69

Ellis Mountain
Unknown
Ø 29mm
Total Impulse
369.0Ns
Burn Time
5.00s
Avg Thrust
69.0N
Max Thrust
149.0N

Thrust Profile (N)

5.00s Burn Window

Engineered by Ellis Mountain, the I69 is a 29mm solid rocket motor designed for high-power rocketry (HPR). As an official I-class motor, it delivers a total impulse of 369.0 Ns over a 5.00 second burn window.

With an average thrust of 69.0 N and a peak of 149.0 N, it features a regressive thrust curve optimal for heavy rockets requiring high off-the-pad acceleration.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 29 mm
Length 406 mm
Hardware SU 29x406
Delays (s) P
Specific Impulse 159.4 s
Peak Thrust 149.7 N
Peak Time T+ 0.1s
T/W Ratio —
Propellant Standard
Profile regressive
Type SU
Sparky No
Mass Budget Unavailable
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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