Sec. 25.231 - Longitudinal stability and control.
(a) Landplanes may have no uncontrollable tendency to nose over in any reasonably expected operating condition or when rebound occurs during landing or takeoff. In addition --
(1) Wheel brakes must operate smoothly and may not cause any undue tendency to nose over; and
(2) If a tail-wheel landing gear is
used, it must be possible, during the takeoff ground run on concrete, to
maintain any attitude up to thrust line level, at 75 percent of V
(b) For seaplanes and amphibians, the most adverse water conditions safe for takeoff, taxiing, and landing, must be established.
[Docket No. 5066, 29 FR 18291, Dec. 24, 1964, as
amended by Amdt. 1-49, 67 FR 70827, Nov. 26, 2002]