Viewing page 175 of 206

This transcription has been completed. Contact us with corrections.

172 U.S. CIVIL AERONAUTICS AUTHORITY

8. Remember that the altimeter lags during radical changes of altitude.
9. Do not engage in acrobatics in the vicinity of any other aircraft.
10. Altitude and safety go hand in hand.
These precautions should never be neglected under any circumstances.

LAZY EIGHTS

The lazy eight is essentially a training maneuver. In its execution, the dive, the turn, and the climb are all combined, and the combinations are varied and applied throughout the performance range of the aircraft. Such a maneuver has great value in the training of students, since constantly varying pressures are required. These must be continuously coordinated, not only as a result of constantly varying the degree of the combination of the components, but also as a result of the varying relationship of the control pressures as speed decreases and increases.
[[image]]
PATH OF THE NOSE OF THE SHIP AS SEEN WHEN LOOKING FROM AN ANGLE OF 90° TO THE VERTICAL PLANE. THIS IS NOT THE PATH OF THE SHIP IN EITHER THE VERTICAL OR HORIZONTAL PLANES.
The lazy eight is unlike all other eights previously given in that the path of the airplane over the ground is not considered. It is the nose of the airplane, rather than the airplane, that describes the figure eight by traversing a path similar to an eight lying on its side.
An outstanding object on the horizon is selected and used as an axis for the maneuver. Part of each loop of the eight will be below the horizon and the remainder above, with the paths between the loops crossing through the axis. The speed of the airplane varies from excess at the bottom of the loops below the horizon, to minimum maneuvering speed at the top of the loops above the horizon.
There are many variations in the way this maneuver can be performed. They depend largely on the nearness of the axis point to the airplane and the angular distance between the heading of the airplane and the axis at the start of the maneuver.
In introducing this maneuver, one of the simpler types should be used. The complexity of the maneuver can be gradually increased as proficiency is attained. The following describes a suitable method for the introductory work. When sufficient progress has been made, the points suggested can be selected closer in the foreground and the angular distance between them increased as desired. Eventually the