Royal Yachting Association unlimited hydroplane rating is a rating applied to hydroplanes competing for the water speed record, as applied by the RYA. It is usually denoted by a circular white badge on the hull, with an infinity symbol "∞" above the K and number for RYA "unlimited" hydroplane group.[1]
The group has included:
| Boat | Driver | ||
|---|---|---|---|
| K1 | .jpg)
|
Miss England III | Henry Segrave Kaye Don |
| K2 | 
|
Miss Britain III | Hubert Scott-Paine Hubert Scott-Paine |
| K3 | 
|
Blue Bird K3 | Malcolm Campbell |
| K4 | .jpg)
|
Blue Bird K4 renamed Bluebird K4 |
Malcolm Campbell Donald Campbell |
| K5 | White Hawk | Frank Hanning-Lee | |
| K6 | Crusader | John Cobb | |
| K7 | 
|
Bluebird K7 | Donald Campbell |
| K8 | British Pursuit | Tony Fahey |
- ^ Knowles, Arthur (2001). The Bluebird Years. Sigma Leisure. ISBN 978-1-85058-766-8.