United Kingdom - naval aviation and armament
United Kingdom - naval aviation

R-4A
| Modification | Purpose | Deliveries | Number of commissioned | Discarding | Differences from the previous modification |
| Hoverfly I | SAR / utility | 1945 | 52 including RAF | 1950s | US YR-4B (7) and R-4B (45) |
| Modification |
Hoverfly I |
|
Rotor diameter, m |
10.97 |
|
Length, m |
|
|
Height, m |
|
|
Rotating area, m2 |
94.5 |
|
Empty mass, kg |
916 |
|
Full flying-off mass, kg |
1150 |
| Engine | 1 Warner R-550-3 |
| Power, h. p. | 200 |
| Maximal speed, km/h | 124 |
| Cruise speed, km/h | |
| Flying range, km | 320 |
| Vertical speed, m/s | |
| Maximal altitude, m | 350 (static) |
| Complement | 2 |
| Armament | none |

R-4A
© Ivan Gogin, 2007