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| Keywords: NH-3A NAN8-65.jpg In 1965 one Sikorsky SH-3A Sea King helicopter U S Navy BuNo 148033 new Sikorsky designation S-61F was converted for high speed research with a modified fuselage twin tubojets stub wings and a 6-bladed rotor It was tested by the US Navy and the US Army for total of 88 hours of tests that explored performance handling qualities stresses vibrations and control loads for eight different configurations The primary objective of the program to extend tests of the compound configuration to a maximum safe speed of not less than 200 knots 370 km/h was achieved Level flight and dive speeds of 211 391 km/h and 230 knots 426 km/h respectively were reached U S Navy Naval Aviation News August 1965 http //www history navy mil/nan/backissues/1960s/1965/Aug65 pdf 1965 USN PD-USGov-Military-Navy Sikorsky H-3 Sea King | ||||
