Sec. 25.497 - Tail-wheel yawing.
(a) A vertical ground reaction equal to
the static load on the tail wheel, in combination with a side component of
equal magnitude, is assumed.
(b) If there is a swivel, the tail wheel
is assumed to be swiveled 90° to the airplane longitudinal axis with the
resultant load passing through the axle.
(c) If there is a lock, steering device,
or shimmy damper the tail wheel is also assumed to be in the trailing
position with the side load acting at the ground contact point.