A Power Plant Man's Look at the Ground Effect Machine

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The “ground‐effect‐machine” (GEM) — a device which would operate in ground effect throughout its entire flight — is currently receiving considerable attention. The analyses published to date indicate that the augmentation ratio due to ground effect approaches infinity as the height‐to‐diameter ratio approaches zero. Because of this, considerable interest has been stimulated in the very low height‐to‐diameter ratio region, and augmentation ratios of “several hundredfold” have been suggested in the literature as practical values.

Document Type: Research Article

DOI: http://dx.doi.org/10.4050/JAHS.4.3

Affiliations: Bureau of Aeronautics, Washington, D.C.

Publication date: July 1, 1959

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  • The Journal of the American Helicopter Society is the world's only scientific journal dedicated to vertical flight technology. It is a peer-reviewed technical journal published quarterly by AHS International and presents innovative papers covering the state-of-the-art in all disciplines of rotorcraft design, research and development. (Please note that AHS members receive significant discounts on articles and subscriptions.)

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    Authors can find submission guidelines and related information on the AHS website.

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