This section talks about how design effects how a plane can maneuver. When a plane goes up its called lift, pushing down on lift is weight. How fast a plane goes forward depends on its thrust, it's help back by its drag. When a plane climbs it has a tendency to turn left and a pilot has to correct for this. The propellers clockwise action causes a torque reaction which makes the airplane want to go counter clockwise. Pilots have to learn how to correct for this. Another correction pilots must make is for asymmetrical thrust which happens when an airplane is flown at a high angle. At a high angle, the ascending propeller blade grabs more air making the plane want to yaw to the left. As the propeller rotates it makes a backward flow of air called a slipstream. The slipstream also causes the plane to yaw. Some air crafts have design features that counter act the left turning tendencies and make the airplane easier to control, placement of the rudder and the engine are two of these.
How well a plane flies is measured in several ways. The lift-to-drag ratio measure how well your plane glides. Glide speed is the best speed for a plane to go to get maximum glide. Its always best to go at your best glide speed. If your engine breaks down you have a better chance to glide to a land. During a decent the path your airplane takes to the ground is called the glide angle. Many factors affect the glide; how much your plane weighs, how its configured - like are your wheels down, and wind resistance.
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