Ten Sikorsky HRS-2 for UK Royal Navy as Whirlwind HAR.21. 
List of Operators of Whirlwind HAR.21 |
| Years | Model | Org | |
|---|---|---|---|
| 1952/62 | S-55 H-19 |  Fleet Air Arm |
Construction Numbers |
| C/N | Year | History | |
|---|---|---|---|
| 55-280 w/o 1955 | 1952 |  130182,WV189 | |
| 55-281 scrapped 1970 | 1952 | 130183,WV190 | |
| 55-282 w/o 1954 | 1952 | 130184,WV191 | |
| 55-283 w/o 1954 | 1952 | 130185,WV192 | |
| 55-284 scrapped 1965 | 1952 | 130186,WV193 | |
| 55-285 w/o 1956 | 1952 | 130187,WV194 | |
| 55-286 scrapped 1963 | 1952 | 130188,WV195 | |
| 55-287 w/o 1956 | 1952 | 130189,WV196 | |
| 55-288 w/o 1956 | 1952 | 130190,WV197 | |
| 55-289 | 1952 | 130191,WV198 |
