Text in force at 29-59: from 29-0, effective 1 Feb 1965.
For the one-wheel landing condition, the rotorcraft is assumed to be in the level attitude and to contact the ground on one aft wheel. In this attitude--
(a) The vertical load must be the same as that obtained on that side under Sec. 29.479(b)(1); and
(b) The unbalanced external loads must be reacted by rotorcraft inertia.
29 FR 16150 · Source