The airplane rule

Display Figure 19.

Given any two axes, mentally place an airplane at the center point of the object with:

• The fuselage parallel to the blue axis
• The front of the airplane pointing in the direction of the blue axis
• The right wing parallel to the red axis pointing in the direction of the red axis.
• The green axis protruding from the top of the pilot's head.

Figure 19. An airplane with its 3D axes exposed.