Handley Page H. P. 20
| Use attributes for filter ! | |
| First flight | February 24, 1921 |
|---|---|
| Manufacturers | Handley Page |
| Date of Reg. | |
| Date of Upd. | |
| ID | 2016070 |
About Handley Page H. P. 20
The Handley Page H. P. 20 was an experimental monoplane modification of a de Havilland DH. 9A, built to study controllable slots and slotted ailerons as high lift devices. It was the first aircraft to fly with controllable slots.