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This technical review provides the correct answers and aerodynamic explanations for a 12-question sail trim test. The analysis clarifies that the total force on a sail acts approximately perpendicular to the sail's chord, generated primarily by suction on the leeward side rather than pressure on the windward side.2:38 Key trim adjustments covered include using the genoa car position to control leech tension and twist, and the effect of halyard tension on moving the draft position forward to create a rounder entry.6:58 The discussion addresses sail shape in heavy air, confirming that flat sails with fine entries are optimal for flat water, while noting that excessive trim can cause a sail to stall and lose lift.17:41 Additionally, the explanation details how shifting weight forward increases weather helm by moving the center of lateral resistance, and defines the outhaul’s role in flattening the lower section of the mainsail.26:12 The content serves as a foundational guide for understanding sail aerodynamics and performance tuning.

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