--:--:-- UTC+7SYSTEM ONLINEF9--
SETTINGS
TOOLS
01
—
ALTITUDE OVER TIME—
HEIGHT
70.0M
—
LIFTOFF MASS
549T
—
SEA-LEVEL THRUST
7.6MN
—
STABILITY (CG−CP)
0M
—
BOOSTER
SHIP
T+ 00:00:00
—
SPEED
0KM/H
ALTITUDE
0KM
01
Specifications
Public figures, rounded. Both rockets at the same scale.
FALCON 9 Block 5 · 2 stages
STARSHIP Block 2 · Super Heavy + Ship
CG and CP: why don't real rockets have big tail fins?
A model rocket is stable when its centre of gravity (CG) sits above its centre of pressure (CP), usually by 1–2 body diameters, so fins are needed. Big rockets fly mostly above thick air and steer their engines (gimbal), so they stay controlled even with a small margin; the grid fins and flaps only work on the way back down. In this model the margin is negative: with no fins the CP sits above the CG, so the stack is aerodynamically unstable and engine gimbal keeps it pointed.
02
Flight phases
From leaving the pad to the booster coming home.
03
Trajectory simulation
2-D simulation (gravity, atmosphere, rotating Earth) for Falcon 9; the Starship profile follows the Flight 11 timeline.
ALTITUDE (KM) — TIME (S)
SPEED (KM/H) — TIME (S)
RESULTS
STARSHIP FLIGHT 11 — ALTITUDE (KM) / TIME (MIN)
04
News · Starship Flight 11
Summary of the article and related milestones.
05
Notes & sources
About the model
An educational visualisation, not engineering data. Geometry is simplified, masses and timelines are public estimates, and the Falcon 9 trajectory comes from a simple 2-D model. No logos or trademarks are used.