Chapter 5

Relative Speed and Angle. Narrow Planes Most Effective. Stream Lines Along a Plane. The Center of Pressure. Air Lines on the Upper Side of a Plane. Rarefied Area. Rarefaction Produced by Motion. The Concaved Plane. The Center of Pressure. Utilizing the Rarefied Area. Changing Center of Pressure. Plane Monstrosities. The Bird Wing Structure. Torsion. The Bat's Wing. An Abnormal Shape. The Tail as a Monitor.