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.
ANGLES OF INCIDENCE (INDICATED APPROXIMATELY) OF AN AEROPLANE DESIGNED AS A COMPROMISE BETWEEN VELOCITY AND CLIMB, AND POSSESSING A SLIGHT MARGIN OF LIFT AT A LOW ALTITUDE AND WHEN THE THRUST IS HORIZONTAL.