42. Sikorsky developed the S-80 helicopter in response to the 1967 request for a Heavy Lift Helicopter. The CH-53E (S-80) evolved from the Sikorsky H-53 (S-65) mainly by adding larger rotor systems and a third engine.
42. Sikorsky developed the S-80 helicopter in response to the 1967 request for a Heavy Lift Helicopter. The CH-53E (S-80) evolved from the Sikorsky H-53 (S-65) mainly by adding larger rotor systems and a third engine.