Aircraft Data Sheet: Cierva CL-20 (1935)
| First flight: | 5th February 1935 |
| Rotor diameter: | 9.75 m/32ft 0ins |
| Length: | 6.17 m/20ft 3ins |
| Max weight: | 635kg/1,400lb |
| Max speed: | 92knots/171kph |
| Power: | One 90shp/67kW Pobjoy Niagra S |
| Accommodation: | |
| No Built: | One prototype only |
Two seat gyroplane built for Cierva and Le Pere. Development abandoned due to threat of WWII.