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.
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.1
This article provides individuals with tools to overcome or at least manage a fear of flying. Flying can be an enjoyable experience if anxiety is not an issue.