• APRIL 7, 2003 P. 34
• APR. 28, 1952 P. 32 (5 Pages) MODEL 21 is cargo design proposal with Allison T40 turboprop.
• APR. 28, 1952 P. 32 (5 Pages) Rotor head has minimum number of parts. Engine drive shaft (lower right) couples through universal joint to transmission. Blade pitch control linkage is slip-ring and pushrod type.
• APR. 28, 1952 P. 32 (5 Pages) TRANSPORT design for 18 passengers carries over Helidyne convertiplane scheme.
• APR. 28, 1952 P. 32 (5 Pages) Five gears, all spiral-bevel type, transmit engine power to coaxial rotors of Gyrodyne 2c, which turn in opposite directions. Entire transmission is shock-mounted to reduce vibration.
• APR. 28, 1952 P. 32 (5 Pages) GYRODYNE 2c helicopter shows changes from earlier version—lengthened fuselage, increased rotor gap and revised landing gear.
• APR. 28, 1952 P. 32 (5 Pages) HELIDYNE, experimental prototype convertiplane, shown in forward flight.
• APR. 28, 1952 P. 32 (5 Pages) CARGO POD for Model 21 is detachable, can be loaded while craft hovers.
• February 13, 1967 P. 111 Gyrodyne QH-50C drone helicopter, loaned by Navy to the Atomic Energy Commission, was used to monitor ground zero during the recent Operation Greely underground atomic test in Nevada. The drone was fitted with both television cameras and radiation sensors to detect venting of radioactive material during the test. AEC officials said the initial use was considered a success despite minor television system troubles and that future use of the vehicle was planned. Drone hovers near control van (above). Television and sensor installation is shown below.
• June 12, 1961 P. 113 Launch, recovery and guidance of the Gyrodyne DSN-1 DASH (drone anti-submarine helicopter) weapon system were proven during operational test and evaluation trials aboard the USS Hazelwood (DD531) off Key West, Fla. Sea trials, conducted in March by the Navy's OPTEVFOR (Operational Test and Evaluation
• October 5, 1959 P. 34
• June 12, 1961 P. 113
• June 12, 1961 P. 113
• February 13, 1967 P. 111
• May 29, 1961 P. 29 Gyrodyne DSN-1 drone helicopter has fiberglass stabilizing fins and fuel tank,
• APRIL 19, 1954 P. 9 British Information ServicesJET COPTER ALOFT-British Fairey Gyrodyne starts flight tests. Piston engine drives compressors supplying air to pressure jets at rotor tips. Wing stubs have pusher props.
• MAR. 2, 1953 P. 228, 229
• MARCH 11, 1963 P. 205
• August 14, 1967 P. 96, 97 Helicopter uses this light pod, with 4-million candlepower, to illuminate battlefield.
• March 9, 1970 P. 111

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