Total Impulse
540.0Ns
Burn Time
2.32s
Avg Thrust
231.0N
Max Thrust
375.0N
Thrust Profile (N)
2.32s Burn WindowEngineered by Alpha Hybrids, the I250 is a 54mm solid rocket motor designed for high-power rocketry (HPR). As an official I-class motor, it delivers a total impulse of 540.0 Ns over a 2.32 second burn window.
With an average thrust of 231.0 N and a peak of 375.0 N, it features a dual-peak thrust curve optimal for general sport flying.
Technical Specifications
National Association of RocketryDiameter 54 mm
Length 711 mm
Hardware Single Use
Delays (s) P
Specific Impulse 155.6 s
Peak Thrust 345.5 N
Peak Time T+ 0.334s
T/W Ratio 12.7
Propellant Standard
Profile dual-peak
Type hybrid
Sparky No
Mass Budget
1854g TotalCasing (Dry)
1500.2g
80.9%
Propellant
353.8g
19.1%
Live Sizing
Flight Envelope
Design wings in your spreadsheet
AeroSheet loads airfoils directly into Google Sheets. Polars, 3D splines, Fusion 360 export, without leaving your spreadsheet.
Comparable I-Class Alternatives
Veenie Kit
Need a custom engineering simulator?
The 3D engine on this page is built by Veenie Aerospace. We build bespoke, browser-native digital twins, aerodynamic simulators, and AI physics tools for UAV startups and defense contractors.