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FLIGHT INSTRUCTOR'S MANUAL   191

maneuvers. They should be practiced both right and left and precision required. Errors in the student's technique will be easily apparent to the instructor. 
   The half "slow roll" may be performed during a climb, straight and level flight, a dive, or a glide. When accuracy, precision, and smooth flying are required of the pilot during its execution, it is one of the most difficult maneuvers to perform and one of the most valuable in developing orientation, control use analysis, and coordination under unusual circumstances, particularly when performed during a climb or glide.  
   In this maneuver, the airplane is rolled around its longitudinal axis and stopped on its back while maintaining the same straight line of flight and degree of climb or glide, or straight and level flight, as 

[[diagram]]

FIGURE 29.—The half slow roll.

the case may be. The recovery is then made in exactly the same manner as from the half snap roll or the last half of a loop. 
   To execute this maneuver during a climb, open the throttle wide, obtain maximum speed, and assume a fairly steep climb. As the speed decreases, apply aileron and rudder in the direction in which it is desired to roll, while holding the nose in the same position. The rudder and ailerons are applied as though starting a bank, except that the use of the ailerons is very predominant in order to obtain a maximum of rolling movement with a minimum of turn, without slipping. As the bank approaches 45°, the elevators are eased forward to prevent turning while the ailerons are still used in the proper manner to obtain their maximum effect, and the rudder is gradually eased off and to the opposite side at such a rate as to maintain the nose in its original position. The appropriate pressures are continued on all controls until the airplane is fully inverted, and when this position is reached, the elevators are eased back as in the top of a loop. When