MLS Free-Kick Studio & Set-Piece Trajectory Simulator
Step up to the 25-yard mark inspired by Chicago Fire set-piece highlights. Tune horizontal strike angle, ball curl via Magnus physics, and lift to beat the 4-man defensive wall and test the goalkeeper.
3D Pitch Camera & Trajectory
Ready for strikeThe Science of Master Set-Pieces
A masterclass free-kick in MLS blends three coupled forces: initial launch velocity, vertical knuckle or dip from gravitational drag, and the aerodynamic Magnus effect produced by tangential ball spin.
When striking around or over a 4-man defensive wall standing 9.15 meters (10 yards) away, a ball must crest cleanly above 1.95 meters before rapidly descending beneath the 2.44-meter crossbar into the side netting.
Set-Piece Scenarios & Telemetry
How does the Magnus curl physics model work?
As the ball spins through the air, differential surface air speed creates a pressure imbalance that accelerates the ball laterally. Right-footed strikes curling inside-out allow players to bend the ball away from the goalkeeper's reach.
What makes a Chicago Fire masterclass set-piece?
Precision placement into the top 15% corners ("upper 90") has a high conversion rate because the goalkeeper cannot react and cross the 7.32-meter frame in under 0.85 seconds.
Where is data processed and exported?
All 3D WebGL rendering, ball dynamics, and session records are calculated client-side in your browser. No video or telemetry is sent to any external server.