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Sikorsky H-5 helicopter built about 1950 and photographed in USA in 1964. Kodachrome scanned film with grain.
A joint of helicopter blades Details of the rotor and part of the body of modern military helicopters closeup
Helicopter flying over clouds
WASHINGTON, UNITED STATES MAY 1970: Marine one in flight in 70's
8-piston aeronautical radial engine bottom view
Close up on helicopter rotors.
Photo taken in Elgin, United Kingdom
Military helicopter at helipad. Directly above.
A 3D rendering of a military helicopter isolated on a white background.
Helicopter Directly Above in Blue, wispy cloud background
Rotating rotor of the helicopter close up
Helicopter flying over New York City on a sunny day
OQ-19 Radioplane radio-controlled aerial target airplane on display at dedication of new terminal at Livingston Betsworth Field (Waterloo Municipal Airport), Waterloo, Iowa, USA in June 9-10, 1951.
Military mi-24a attack helicopter gunship engine and rotor close-up abstract detail
Flying helicopter model.
Military helicopter rotor blade detail close up. Military helicopter rotor blade detail close-up.
Roseville, CA – July 12, 2024:  Cal Fire's Nevada-Yuba-Placer Unit battles a fast-moving dry grass fire threatening Placer County, California. Ignited near Athens Avenue and Fiddyment Road, the blaze spread rapidly due to extremely hot, dry conditions.  Cal Fire crews work to contain the flames and prevent further damage.
Close-Up Of Helicopter Propeller Against Blue Sky
Madras, Oregon, USA - August 29, 2015: An Erickson Air-Crane S-64, named Delila, fills its water tank from Lake Billy Chinook during firefighting operations just southeast of Madras, Oregon.
Rear rotor of a modern transport helicopter stationary on the ground
Spitfire Mk IX Instruments and gunsight
Small two-man helicopter flying overhead with cloudy sky in background
Morlaix, France - September 18 2022: the Aérospatiale Alouette II is a French light helicopter originally manufactured by Sud Aviation and later Aérospatiale.
Falköping, Sweden-May, 2020: Look here, text in swedish on a tail at an old sailplane
Kathmandu, Nepal: Aérospatiale Alouette III of the Nepalese Army Air Service in flight with open door. Nepal has no separate Air Force but the Nepalese Army operates aircraft.
Military helicopter rotor blade detail close up. Military helicopter rotor blade detail close-up.
The inner instrument panel of a military aircraft
Underside of a  jet airplane wing.
Free Images: "bestof:Lech Experimental Co-Axial Helicopter Model SDASM.CATALOG: Lech_00136 SDASM.DATE: 1945-1948 SDASM.ADDITIONAL INFORMATION: Rotor hub 1945-body with controls 1948"
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