J Class Rocket Motor

Ellis J270

Ellis Mountain
Unknown
Ø 38mm
Total Impulse
648.5Ns
Burn Time
3.47s
Avg Thrust
270.0N
Max Thrust
427.6N

Thrust Profile (N)

3.47s Burn Window

Engineered by Ellis Mountain, the J270 is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 648.5 Ns over a 3.47 second burn window.

With an average thrust of 270.0 N and a peak of 427.6 N, it features a regressive thrust curve optimal for general sport flying.

Technical Specifications

Tripoli Rocketry Association, Inc.
Diameter 38 mm
Length 384 mm
Hardware 38X438.1 38X467(D)
Delays (s) 20,P
Specific Impulse 190.5 s
Peak Thrust 386.52 N
Peak Time T+ 0.175s
T/W Ratio 38.66
Propellant Standard
Profile regressive
Type reload
Sparky No

Mass Budget

712g Total
Casing (Dry)
364.9g
51.2%
Propellant
347.1g
48.8%
Live Sizing
Flight Envelope

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