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Modern wind turbine blades are designed with a subtle twist along their length, a feature that puzzles casual observers accustomed to thinking of the blades as simple flat propellers. The twist compensates for the fact that different sections of the blade travel through the air at different speeds: the tip moves much faster than the base for a given rotation, since it covers greater distance per revolution. Without this twist, sections near the tip would generate excessive lift relative to those near the base, creating uneven stress and reducing overall energy capture. Engineers determine the precise twist angle through aerodynamic modeling that balances efficiency across the entire blade length rather than optimizing any single section in isolation.