The Aeroplane Speaks. Fifth Edition

4. The velocity being low, then it follows that for that reason also the angle of incidence should be comparatively large. 5. Camber.--Since such an aeroplane would be of low velocity, and therefore possess a large angle of incidence, a large camber would be necessary. Let us now consider the essentials for an aeroplane of maximum velocity for its power, and possessing merely enough lift to get off the ground, but no margin of lift. 1. Comparatively high velocity. 2. A comparatively small surface, because, being of greater velocity than the maximum climber, a greater mass of air will be engaged for a given surface and time, and therefore a smaller surface will be sufficient to secure the requisite lift. 3. A small angle relative to the propeller thrust, since the latter coincides with the direction of motion. 4. A comparatively small angle of incidence by reason of the high velocity. 5. A comparatively small camber follows as a result of the small angle of incidence.