| WS-51 Dragonfly | |
|---|---|
 Dragonfly HR.3 of 705 Naval Air Squadron Royal Navy in 1955 | |
| General information | |
| Type | Rescue or communications helicopter |
| National origin | United Kingdom |
| Manufacturer | Westland Aircraft |
| Status | Retired |
| Primary users | Royal Navy |
| Number built | 149 |
| History | |
| Manufactured | 1949–1954 |
| Introduction date | 1950 |
| First flight | 5 October 1948 |
| Developed from | Sikorsky H-5 |
| Variants | Westland Widgeon |
The Westland WS-51 Dragonfly helicopter was built by Westland Aircraft and was an Anglicised licence-built version of the American Sikorsky S-51.