Total Impulse
336.0Ns
Burn Time
0.70s
Avg Thrust
479.0N
Max Thrust
1069.0N
Thrust Profile (N)
0.70s Burn WindowEngineered by Contrail Rockets, the I500-HP is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official I-class motor, it delivers a total impulse of 336.0 Ns over a 0.70 second burn window.
With an average thrust of 479.0 N and a peak of 1069.0 N, it features a regressive thrust curve optimal for heavy rockets requiring high off-the-pad acceleration.
Technical Specifications
Tripoli Rocketry Association, Inc.Diameter 38 mm
Length 719 mm
Hardware 38 28 XF HP (275CC)
Delays (s) P
Specific Impulse 206.3 s
Peak Thrust 1155.16 N
Peak Time T+ 0.001s
T/W Ratio 61.03
Propellant Standard
Profile regressive
Type hybrid
Sparky No
Mass Budget
800g TotalCasing (Dry)
634.0g
79.3%
Propellant
166.0g
20.8%
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.