Practical Aeronautics: An Understandable Presentation of Interesting and Essential Facts in Aeronautical Science (Classic Reprint) - Hardcover

Hayward, Charles B.

9781528476690: Practical Aeronautics: An Understandable Presentation of Interesting and Essential Facts in Aeronautical Science (Classic Reprint)

Hardcover

ISBN 10: 1528476697 ISBN 13: 9781528476690

Publisher: Forgotten Books, 2018

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Excerpt from Practical Aeronautics: An Understandable Presentation of Interesting and Essential Facts in Aeronautical Science

Early Attempts. Leonardo da Vinci devoted some time to the problem of artificial ﬂight. His sketches show the details of bat like wings which were to spread out on the downward stroke and fold up with the upward stroke. Francisco de Lana planned to make a ﬂying ship the appearance of which was somewhat like that shown in Fig. I, by exhausting the air from metal spheres fastened to a boat.

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