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.
Install in Google Sheets coming soon 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.