Dragonboat Lab

100 m · standing start

Paddle Lab

Tune catch angle (0–45°), depth, length, rate, crew size, and sync — then race 100 m. Multi-paddler toy physics, 2D side view.

Coach-aligned stroke: bury near ~45° forward, pull toward vertical, exit by the hip. Poor sync (“caterpillaring”) chops force and speed. Vanilla HTML + canvas — no build step.

Portrait-friendly · works offline once loaded

Result

Time · 100 m

—s

Average speed

—m/s

Peak speed

—m/s

Sync

—%

Dist 0.0 m Speed 0.00 m/s Time 0.00 s

Stroke length — catch-to-exit through water 1.35 m

Insert depth — how deep the blade goes 32 cm

Insert angle — 0° vertical → 45° forward catch 35°

Stroke rate 72 spm

Effort — how hard each paddler pulls 100%

Crew (5 seats) Stern → bow · set skill per seat

Sync quality — 100% = perfect timing 85%

Pace variance — SPM spread across crew 15%

Target pace — goal time for 100 m 28.0 s

est. —