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Smith_K - Kyle Smith AAE 415 Fall 2003 Glider A little...

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Kyle Smith AAE 415 Fall 2003 Glider
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A little Background Power Necessary? 1486 – Leonardo da Vinci 1799 - Sir George Cayley 1855 – Captain Le Bris Leonardo da Vinci Sir George Cayley
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Otto Lilienthal Learned from birds Believed that a propulsion device was neither necessary nor desirable Lost his balance and died on August 9 th , 1896
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Octave Chanute Improved upon Lilienthal’s design More than 1000 successful flights between 1896 and 1897 “Chanute type”
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Wright Brothers Inspired by the news of Lilienthal’s death Shifting weight/lift not practical Kitty Hawk December 17, 1903 622 feet in 26 seconds
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Types of Sailplanes Primary Glider (L/D ~ 12) Secondary (Utility) Glider (L/D ~ 15) Intermediate Sailplane (L/D ~ 20) High performance Sailplane (L/D ~ 26-33)
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Aerodynamics D L x y C C D L H R H R D L D L F D W L F = = = = = - = = + - = θ θ θ θ θ θ cot cot 0 cos sin 0 sin cos θ L D ΔR ΔH θ W S W V S W C C C C V D L V V D L V V S C W V SINK L D D L FLIGHT FLIGHT
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