Total Impulse
228.7Ns
Burn Time
1.69s
Avg Thrust
155.0N
Max Thrust
416.8N
Thrust Profile (N)
1.69s Burn WindowEngineered by Sky Ripper Systems, the H155 is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official H-class motor, it delivers a total impulse of 228.7 Ns over a 1.69 second burn window.
With an average thrust of 155.0 N and a peak of 416.8 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 533 mm
Hardware H 38/220
Delays (s) P
Specific Impulse 164.2 s
Peak Thrust 362.22 N
Peak Time T+ 0.05s
T/W Ratio 23.8
Propellant Standard
Profile regressive
Type hybrid
Sparky No
Mass Budget
664g TotalCasing (Dry)
522.0g
78.6%
Propellant
142.0g
21.4%
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 H-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.