Igor Stropnikvideo
How to Sail Upwind
May 28, 2026 · 4 min · 5K views
Sailor leans into tack on catamaran in bright sun
What this video covers
Sailing upwind relies on the aerodynamic lift generated by the sail, which functions identically to an airplane wing.0:45 As wind flows over the curved surface of the sail, the pressure differential creates a force that pulls the boat forward and sideways.1:13 To counteract the lateral force and minimize leeway, a daggerboard provides resistance against the water.1:54 Because a boat cannot sail directly into the wind without losing airflow and stalling, sailors must maintain a specific minimum angle to the wind to keep the sails powered.2:18 To reach a destination located directly upwind, the boat must perform a series of tacks, zig-zagging across the wind direction to make progress toward the objective.3:08 A tack involves turning the bow through the wind to shift the wind angle to the opposite side of the boat.2:22
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