風があるときのOn Pylon飛行法

Abstract

The flight is performed only at the specified altitude vv2/g in the windless condition, where v is the velocity of airplane and g the gravitational acceleration. In the presence of wind, the variation of the relative velocity of airplane to the ground makes it impossible to hold this specified altitude in aiming at a fixed pylon on the ground. Allowing slight deviations in the altitude from the specified one, a flight procedure is derived analytically in which the lateral axis of the airplane passes always through the pylon. Numerical examples indicate the applicability of this procedure. Concerning the flight around pylon, also a method is presented to facilitate the procedure in the presence of wind. An accurate flight can be established, by selecting a virtual pylon on the ground at rw/v beyond the true pylon when the airplane is just on the head-wind position, and by performing the flight against this virtual pylon at the altitude vv2/g, where w is the wind velocity and r the radius of the flight path circle which should be projected on the ground.