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## 524 CURRENT TOPICS. [J. F. I. On Riding Hummingbirds.--(Industrial Bulletin of Arthur D. Little, Inc., No. I76.) Helicopter growth and development may parallel that of the automobile. Lack of landing space is now a major handicap to private flying, but the helicopter lands on an area fifty to eighty feet square, with almost any surface condition, and with greater safety through being able to land with no forward speed at all. The first successful helicopter, built in I936 in Germany by Foehe-Achgelis Company, stimulated the interest of such other designers as Louis Brequet in France, Laurence Le Page of Day and Zimmermann, Inc., and Igor Sikorsky of the Vought-Sikorsky Aircraft Division of the United Aircraft Corporation and designer of the Pan-American "clippers." The most successful helicopter developments announced in this country have been those of Mr. Sikorsky. The present Sikorsky helicopter weighs I29o pounds, ascends and descends vertically, hovers over a spot near the ground, wind or no wind, flies backwards, forwards or sidewise, or rotates about its axis. It is also reported to go seventy to eighty miles per hour, operate with little noise, handle as simply as an airp

Who reads On Riding Hummingbirds?

Author

R.H.O

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0016-0032)

Published

1942

Field

Engineering (Physical Sciences)