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- W2057783434 abstract "Few wind tunnel studies of animal flight have controlled or corrected for distortions to behaviour, physiology or flight aerodynamics representing the difference between flight in the tunnel and flight in free air. Aerodynamic correction factors are derived based on lifting-line theory and the method of images for an animal flying freely within closed- and open-section wind tunnels; the method is very similar to that used to model flight in ground effect, and as in ground effect the corrections to induced drag may be substantial. These correction factors are used to estimate bound wing circulation, drag and mechanical power for comparison with free flight, and to derive testable predictions of optimum flight strategies for an animal in a tunnel. In an open-section tunnel, mechanical power is increased compared to free flight, and the animal should fly at the tunnel centre. In a closed tunnel mechanical power is usually reduced, and substantial savings are available, particularly at low speeds, if the animal flies close to the tunnel roof. Anecdotal observations confirm that birds and bats adopt this strategy. The mechanical power-speed curve in a closed tunnel is flatter than the curve for free flight, and this may explain the flat metabolic power-speed curves for birds and bats obtained in some measurements." @default.
- W2057783434 created "2016-06-24" @default.
- W2057783434 creator A5022017957 @default.
- W2057783434 date "1994-12-01" @default.
- W2057783434 modified "2023-10-15" @default.
- W2057783434 title "Aerodynamic corrections for the flight of birds and bats in wind tunnels" @default.
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- W2057783434 doi "https://doi.org/10.1111/j.1469-7998.1994.tb04864.x" @default.
- W2057783434 hasPublicationYear "1994" @default.
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