Sikorsky S-72 Sikorsky S-72 The Sikorsky S-72 was an experimental hybrid helicopter/fixed-wing aircraft developed by helicopter manufacturer Sikorsky Aircraft. The Rotor Systems Research Aircraft (RSRA) was developed by Sikorsky for NASA and the Army. The RSRA was developed to allow the inflight measurement of helicopter rotor characteristics. The airframe was developed using an existing Sikorsky S-61 main rotor, an S-61 roller gearbox, and a highly modified Sikorsky S-67 airframe. The RSRA could be fitted with TF34 turbofans and wings to allow compound helicopter configurations to be experimentally investigated at speeds up to . In addition, it could fly as a fixed-wing aircraft
Igor I. Sikorsky Memorial Bridge also includes a system of concrete fenders that protects the bridge piers from ship collisions, a feature that was absent from the 1940 span. In 2006, the new bridge was formally dedicated as the Igor I. Sikorsky Memorial Bridge. Igor I. Sikorsky Memorial Bridge The Igor I. Sikorsky Memorial Bridge (also known as the Sikorsky Memorial Bridge, and the Housatonic River Bridge) carries the limited-access Connecticut Route 15 over the Housatonic River, between Stratford and Milford, Connecticut. The first bridge, known as the Sikorsky Bridge (not to be confused with the new Igor I. Sikorsky Memorial Bridge's name), on the