Sikorsky  HO4S  Chickasaw   The Sikorsky S-55, once a very widespread helicopter type. Some are still flying, some equipped with turbine engines. The H-19 had a radial engine fitted in the bulbous nose, behind clamm-shell doors. The fuselage was deep and box-like, with the cockpit high on top above the spacious cabin. The H-19 was used by the USAF, the USN, the USMC and the USCG --- the Navy designations were HO4S and HRS.   Type: UH-19B Function: utility Year: 1951 Crew: 2 Engines: 1 * 800hp Wright R-1300-3 Rotor Span: 16.15m Length: 12.88m Height: 4.06m Disc Area: 204.94m2 Empty Weight: 2381kg Max.Weight: 3583kg Speed: 180km/h at SL Ceiling: Range: 720km Load: 10 seats     Known BUNO's: 144255 - Written Off, McMurdo, Antarctica Dec 18, 1963. 144256 - Struck Off Charge Sep 5, 1967. 144257 - Crashed in Antarctica Feb 12, 1959, aircraft not recovered. 144258 - Struck Off Charge Aug 1, 1967.     Reference: http://www.helis.com/50s/h_h19.htm http://www.topedge.com/panels/aircraft/sites/gustin/us/H19CHIKA.html