Total Impulse
891.0Ns
Burn Time
2.70s
Avg Thrust
318.0N
Max Thrust
1222.0N
Thrust Profile (N)
2.70s Burn WindowEngineered by Contrail Rockets, the J345-PVC is a 38mm solid rocket motor designed for high-power rocketry (HPR). As an official J-class motor, it delivers a total impulse of 891.0 Ns over a 2.70 second burn window.
With an average thrust of 318.0 N and a peak of 1222.0 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 1227 mm
Hardware 38 48 F PVC (735CC)
Delays (s) P
Specific Impulse 493.6 s
Peak Thrust 881.09 N
Peak Time T+ 0.006s
T/W Ratio 28.99
Propellant Standard
Profile regressive
Type hybrid
Sparky No
Mass Budget
1118g TotalCasing (Dry)
934.0g
83.5%
Propellant
184.0g
16.5%
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.