The Philippine S-76 Sikorsky

Ph S—76 Sikorsky was an American medium—sized commercial utility chopper that was manufactured by SAC (Sikorsky Aircraft Corporation). S—76 features a twin turbo shaft engines, with four—bladed main and tail rotors and a retractable landing gear.

The development of S—76 began in mid 1970s as S—74 with the design goal of providing medium chopper for a corporate transportation and oil drilling industry. S—74 later re—designated to S—76 in honor of United States Bicentennial. 

The Sikorsky's design work on S—70 helicopter (which selected for use by United States Army as UH—60 Black Hawk) was then utilized in development of S—76, incorporating the S—70 design technology in its rotor blades and rotor heads. It was then the first Sikorsky helicopter designed purely for commercial rather than military use.

Prototype versions first flew on 1977. United States Federal Aviation Administration type certification was granted on 1978, the first customer delivery on 1979. The S—76 was named "Spirit" in 1978 but this name was officially dropped by the company on 1980 due to the translation issues into some foreign languages.