The
Kellett Autogiro Corporation
was an American aircraft
manufacturer from 1929 based in
Philadelphia, named after founder W.
Wallace Kellett (? – July 23, 1951).
The Kellett Autogiro
Corporation was formed after
it acquired a licence from
Pitcairn-Cierva to build
autogiros. The first three
designed were all typical
Cierva designs and the more
advanced KD-1 was similar to
the contemporary Cierva
C.30. The KD-1/G-1 was the
first practical rotary-wing
aircraft used by the United
States Army. The company
stopped building autogyros
in the late 1940s and
switched to the design of
helicopters. In the 1950s it
built some ultra-light
helicopters the RH-1 to test
some rotor features and its
last design the K-25 was an
experimental convertiplane
using tilt-rotors.
Source:
Wikipedia
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