Total Impulse
722.0Ns
Burn Time
1.93s
Avg Thrust
405.0N
Max Thrust
518.0N
Thrust Profile (N)
1.93s Burn WindowEngineered by Kosdon by AeroTech, the J405S is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 722.0 Ns over a 1.93 second burn window.
With an average thrust of 405.0 N and a peak of 518.0 N, it features a neutral thrust curve optimal for general sport flying.
Technical Specifications
Tripoli Rocketry Association, Inc.Diameter 38 mm
Length 476 mm
Hardware 38-800
Delays (s) P
Specific Impulse 200.5 s
Peak Thrust 528.5 N
Peak Time T+ 0.009s
T/W Ratio —
Propellant Standard
Profile neutral
Type reload
Sparky No
Mass Budget Unavailable
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 J-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.