Title 14 - Aeronautics and Space

Volume: 1Date: 2024-01-01Original Date: 2024-01-01Title: Section 29.505 - Ski landing conditions.Context:
Title 14 - Aeronautics and Space. CHAPTER I - FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION. SUBCHAPTER C - AIRCRAFT. PART 29 - AIRWORTHINESS STANDARDS: TRANSPORT CATEGORY ROTORCRAFT. Subpart C - Strength Requirements. - Ground Loads.

§ 29.505
Ski landing conditions.
If certification for ski operation is requested, the rotorcraft, with skis, must be designed to withstand the following loading conditions (where
P
is the maximum static weight on each ski with the rotorcraft at design maximum weight, and
n
is the limit load factor determined under § 29.473(b)):
(a) Up-load conditions in which—
(1) A vertical load of
Pn
and a horizontal load of
Pn/4
are simultaneously applied at the pedestal bearings; and
(2) A vertical load of 1.33
P
is applied at the pedestal bearings.
(b) A side load condition in which a side load of 0.35
Pn
is applied at the pedestal bearings in a horizontal plane perpendicular to the centerline of the rotorcraft.
(c) A torque-load condition in which a torque load of 1.33
P
(in foot-pounds) is applied to the ski about the vertical axis through the centerline of the pedestal bearings.