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wings by proper direction of the propeller slipstream. For some time his findings on this have had universal acceptance in aerodynamic planning of modern aircraft. Walden also developed means of insuring greater accuracy in divebombing practice. During his lifetime some fifty patents of a widely ranging variety were granted him. Dr. Walden maintained a dental office for many years, where he occasionally continued his practice for lifelong friends and old patients. Combined with this office was a small workshop and laboratory where he personally carried out private research on various projects of interest to him. Dr. Walden passed away in New York on September 13, 1964, survived by his wife, three sons and nine grandchildren. Early Bird and Flying Pioneer Henry Walden certainly contributed a very major part to early American aviation history. His foresight in pioneering the monoplane exemplifies his sound creative judgement. He was also a member of the Quiet Birdmen and contributed many articles on aviation to various magazines. His was a life of hard work, sacrifice and a firm determination to carry on in the face of many discouragements which would have stopped most men. Fortunately he lived to enjoy the satisfaction that he was right and see the monoplane become universally adopted. 6
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