Thrust Profile (N)
1.63s Burn WindowEngineered by AeroTech, the HP-J425R is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 680.3 Ns over a 1.63 second burn window.
With an average thrust of 417.6 N and a peak of 473.3 N, it features a dual-peak thrust curve optimal for general sport flying. It utilizes the Redline propellant formulation, dictating its specific impulse and exhaust signature.
Technical Specifications
Tripoli Rocketry Association, Inc.Mass Budget
631g TotalDesign 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 soonNeed 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.