the Brantly B-1,
with co-axial rotors, in 1943. From this design he developed
the improved Model B-2, using the rotor evolved for
the B-1, a two-seat
Brantly-Hynes Model 305
helicopter which first flew on August
14,1956. Subsequently entered production as Model B-2A, superseded by B-2B in 1963. Larger Model 305, a
five-seat aircraft, first flew in January 1964. Company
acquired by Lear Jet Industries Inc in May 1966.
