Sikorsky HSS-1 fitted with two GE YT-58 turbine engines as test bed for HSS-2 prototype. Redesignated SH-34H in Oct62. 
List of Operators of HSS-1F / SH-34H |
| Years | Model | Org | |
|---|---|---|---|
| 1955/70 | S-58 H-34 |  US Navy |
Construction Numbers |
| C/N | Year | History | ||
|---|---|---|---|---|
| 58-264 | 1956 | 141601 | ||
