The Title of this paper gives only the broadest indication of the line it is intended to take. Other papers with similar titles have been read by those connected with the design or aerodynamic side, but this paper is mainly concerned in conveying the pilot's own view of the problems of high-speed flying.

The paper is divided under the following main headings:—

1. 1. The obstacles to negotiate at high and low altitude.

2. 2. The approach to high–speed investigation and means of obtaining test results.

3. 3. Present and future requirements of research aircraft.

4. 4. Pilot safety measures.

5. 5. Some requirements of a pilot engaged in high speed research and development flying.

For the most part it is intended only to cover research and development flying. This necessarily entails some reference to combat, which is in itself a separate field.

The problems confronting a pilot who sets out to explore the behaviour of contemporary aircraft at high speed are considered first.