Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49Next
January 13, 1942: first flight of the Sikorsky R-4, an American two-place helicopter designed by Igor Sikorsky with a single, three-bladed main rotor and powered by a radial engine. First helicopter to enter service with the United States Army Air Forces, Navy, and Coast Guard, as well as for the United Kingdom’s Royal Air Force and Royal Navy.
Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49Next
