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During the early twenties many experimenters in aviation undertook the challenge of making a craft which would rise vertically and hover in the air. Realizing that such a machine would have military value for observation and fire-control, the war department of several nations encouraged such inventions. The de Bothezat Helicopter was developed by the U. S. Air Service, Engineering Division in 1921 with these ideas in mind. Dr. George de Bothezat, a noted Russian aeronautical engineer at the time, designed the helicopter. The de Bothezat was 65 feet long, 65 feet wide, and 10 feet high. It was powered with a 180 h.p. engine and weighed 3,600 lbs. The engine was located at the center above the four-wheeled chassis. Four triangular framework arms extended at right angles, and at their extremity each supported a six-bladed air screw, which is the chief feature of the de Bothezat. Many power tests were made at McCook Field in Dayton, Ohio. The test on December 18, 1922 was notable with a duration in the air of one minute 42 seconds which was attained at a maximum height of six feet.

 Identifier

NASM.2002.0035

Date

undated

Provenance

Phillip Weiner, Gift, 2002

Extent

0.1 Cubic feet ((1 flatbox))

Archival Repository

National Air and Space Museum Archives

Scope and Contents

This album contains eleven photographs of the de Bothezat Helicopter in flight, a photograph of Dr. George de Bothezat, an illustration of the de Bothezat Helicopter, and memorandum from the War Department Air Service Engineering Division from April 28, 1923 concerning the test flights of this helicopter at McCook Field.

Rights

Material is subject to Smithsonian Terms of Use. Should you wish to use NASM material in any medium, please submit an Application for Permission to Reproduce NASM Material, available at Permissions Requests

Restrictions

No restrictions on access.

Citation

de Bothezat Helicopter Album, Accession 2002-0035, National Air and Space Museum, Smithsonian Institution.

Topics

Helicopters

Aeronautics

de Bothezat Helicopter

Helicopters -- Flight testing

Aerospace engineering

Type

Collection descriptions

Archival materials

Photographs

Illustrations

Memoranda