US Army's first turbine-powered helicopter, developed from the S-52. Rejected in favor of the Bell 204 (UH-1 Iroquois)
List of Operators of Sikorsky S-59 XH-39
| From ||Organisation with model S-59 XH-39 |
| 52-004 || S-52-2 || 1950 || N74150 : S-52-2 Sikorsky S-52-2, c/n 52-004, ff:?; reg Sikorsky as S-52+ |
S-52-3 modified to S-52-3, N74150, unk.
modified into S-59 prototype, 1954; static display at W+
| 52-007 || YH-18 || 1951 || 49-2890 : YH-18 Sikorsky S-52-2, c/n 52-007, ff:?; acc 29Mar51; del US + |
modified to S-52-5, YH-18B configuration, unk; modified+
26aug54 XH-39 set a world speed record for a helicopter+
| 52-008 || YH-18 || 1951 || 49-2891 : YH-18 Sikorsky S-52-2, c/n 52-008, ff:?; acc 17Apr51; del US + |
modified to S-59/XH-39A prototype, c/n 59-002, 49-2891,+
rtnd to YH-18A configuration, unk.
N7741 : S-52-2 wfu & reg US as S-52-2, N7741, unk.