Dorothy, of course repeated these movements after him.
Then he explained that to hold a steady course, to fly straight, constant right rudder must be maintained to overcome the torque, or drag of the propeller blades tending to swing the nose to the left. While to fly level longitudinally, some point on the engine is kept in line with the horizon. That to fly level laterally, up aileron and opposite rudder are applied whenever a wing drops. He told her numerous other things, such as that when flying straight, the nose should frequently be dropped momentarily, or the course changed a few degrees in order to look ahead. Otherwise, an approaching plane may be hidden by the engine.
"Good night!" thought Dorothy as she strained her ears to catch every word, while she watched the controls and saw how the plane reacted to their manipulation by her instructor. "If it takes all this detail to fly straight and level, I'll get the heebie-jeebies when it comes to acrobatics!"
"Take over controls," came Bill's voice. "Fly straight for that white church tower on the horizon."
Dorothy's body stiffened, but she took hold of the stick again bravely enough, and placed her feet on the rudder bar at the same time. She could feel her temples throbbing, and her heart was beating faster than the clock on her instrument board. At last she was actually flying an airplane--all by herself. But was she? Suddenly there came a check in the forward speed of the plane and Dorothy felt it start to slew off sideways as the nose dropped.
Then before she knew exactly what was happening, the stick in her hand seemed to spring back, then to the right, while right rudder increased considerably without help from her foot. Up came the nose, followed by the left wing, and down went the right. The slewing stopped as suddenly as it had begun. Then she felt left aileron and left rudder being applied--and once more the N-9 was flying straight and level.
"Forgot what I said about checking a skid just now, didn't you?" said Bill's voice in her ear. "Here's the news again. Any swinging of the nose to the left can be promptly recognized and checked--but,--and here's where you went wrong--the nose cannot be swung back to the right without applying a small bank. Any attempt to do so will cause your plane to skid. That naturally results in a loss of flying speed forward and the heavier end drops. If not checked at once, it means going into a spin. Carry on again now, and please try to keep your wits about you. This is not a kiddie-car. Mistakes are apt to be costly!"
Dorothy bit her lips in anger. More than ever did she regret the lack of a mouth piece on her head phone. Her temper flared at his sharp tone, and what seemed to her unfair criticism so early in the game. But she took over again as he ordered and gradually her vexation disappeared in her effort to concentrate every faculty on the job of flying the plane and keeping to her course. She was gradually gaining confidence. She made the same maneuvers which had caused the skid before, and carried through perfectly.
Bill told her so in no stinted terms, and the last shreds of her anger disappeared.
"The man who put me over the bumps," he added, "always said: 'when a student aviator makes a mistake, give him blazes--make him mad. He'll remember what he should have done all the better--and live longer!' That advice applies to either sex, Dorothy. Naturally, I hope you'll live to a ripe old age."