Recognition: Army Air Forces Ground Observer Corps - Identification of Aircraft - VI: Tail

CHAPTER VI: TAIL

SECTION I. Tailplane

74. When viewed from underneath, the shape of the tailplane (the horizontal surface consisting of the stabilizer and the elevator) furnishes valuable identification clues. Although tailplane shapes vary to a greater degree than do wing shapes, the wing shape classifications discussed in Paragraphs 57 and 58 furnish an excellent basis on which to approach this feature of the plane.

75. First, then, as to general shape.

76. Next, the classifications of wing-tip shapes (Paragraph 58) may be used in observing the tips of tailplanes.

77. Given a profile view, the point to be observed with respect to the tailplane is whether it is mounted high or low upon the fuselage.

SECTION II  FIN AND RUDDER

78. The size and shape of the fin and rudder are observable from a profile view. Their relative size with respect to the fuselage may be quite apparent and helpful.

79. Great variation exists in the shapes of this and rudders. Some of the common shape characteristics are:

80. From the front view, or at an angle, it is often possible to observe the height of the fin and rudder, and to spot those planes dist inguished by dual rudder controls. Contrast :