Figure 15. Leg control effectiveness for tent posture for leg angles of –30 (large down triangle), –15 (down triangle), 0 (square), +15 (up triangle), and +30 (large up triangle).

With leg and tail feathers, A & C, and without, B & D. At low angle of attack, leg up produces a nose up moment relative to zero leg angle, while leg down produces a nose down moment relative to zero leg angle, C. Without leg feathers, the legs still have smaller effects, D. At high angles of attack, leg pitch effects become noisy and difficult to identify.