SJ-ROC1

Meet the SJ-ROC1: an imposing two-stage, high-power rocket designed for Aerotech M and K motors. Built for seasoned rocketeers who want serious altitude, big performance, and head-turning pad presence.

Designer

SotRoc

Stage Count

2

Engines

Aerotech K1100T
Image

Apogee

4304 m

Total Flight Time

300.0 s

Rocket Length

2502 mm

Max. Diameter

100 mm

Download SJ-ROC1 Download
SpaceCAD model rocket
design file.
Unleash serious high-power excitement with the SJ-ROC1, SotRoc’s bold two-stage beast designed to own the flight line at any NAR launch. Standing over eight feet tall and built around a robust 4-inch airframe, the SJ-ROC1 is crafted for experienced rocketeers who crave blistering performance and a show-stopping presence. Purpose-built for Aerotech’s legendary M1419W and K1100T composite motors, this rocket delivers jaw-dropping power and altitude, reaching well over 14,000 feet in dual-stage glory. The clean, aggressive lines and massive fin can command attention on the pad, while the stout construction - think precision-cut plywood fins, fiberglass reinforcement, and a rock-solid interstage coupler - ensures you’re ready for repeat flights.

Recovery is handled by a dependable 24-inch TAC-1 parachute, balancing safe descent with minimal drift. The generous payload section invites advanced altimeters or tracking gear, making the SJ-ROC1 a perfect platform for high-power certification flights, sport launches, or pushing your rocketry skills to the edge. Designed with the seasoned builder in mind, this rocket rewards careful craftsmanship and promises spectacular results. If you’re ready to move beyond L2 and make a statement at your next club launch, the SJ-ROC1 is your ticket to the stratosphere. Get ready to build, launch, and impress - this is high-power rocketry at its finest.
Flight Results
Apogee (hmax) 4304 m at 20.6 s
Velocity (vmax) 491 m/s at 9.2 s
Acceleration (amax) 276 m/s² at 8.0 s

Rocket Weight
Lift-Off 11139.7 g
Burnout 6346.1 g
Propellant Weight 4793.6 g

Stability
Center of Gravity (CG) 1975 mm
Center of Pressure (CP) 1946 mm
Stability stable

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