Ground loading conditions: landing gear with tail wheels.

CFR · 2024-01-01 · US · Title 14

(a) (b) (1) The vertical loads must be applied under §§ 29.471 through 29.475; (2) The vertical load at each axle must be combined with a drag load at that axle of not less than 25 percent of that vertical load; and (3) Unbalanced pitching moments are assumed to be resisted by angular inertia forces. (c) (d) (1) The appropriate ground loads specified in paragraph (b)(1) and (2) of this section must be determined and applied, using a rational method to account for the moment arm between the rear wheel ground reaction and the rotorcraft center of gravity; or (2) The probability of landing with initial contact on the rear wheel must be shown to be extremely remote. (e) (f) (1) The side loads must be combined at each wheel with one-half of the maximum vertical ground reactions obtained for that wheel under paragraphs (b) and (c) of this section. In this condition, the side loads must be— (i) For the forward wheels, 0.8 times the vertical reaction (on one side) acting inward, and 0.6 times the vertical reaction (on the other side) acting outward; and (ii) For the rear wheel, 0.8 times the vertical reaction. (2) The loads specified in paragraph (f)(1) of this section must be applied— (i) At the ground contact point with the wheel in the trailing position (for non-full swiveling landing gear or for full swiveling landing gear with a lock, steering device, or shimmy damper to keep the wheel in the trailing position); or (ii) At the center of the axle (for full swiveling landing gear

official document · source cfr-2024 · id 14:§ 29.497