Description / Abstract:
This SAE Aerospace Recommended Practice (ARP) applies to landing
gear structures and mechanisms (excluding wheels, tires, and brakes
and other landing gear systems) for all types and models of civil
and military aircraft.
All axles, wheel forks, links, arms, mechanical and gas/oil
shock struts, downlock and uplock assemblies, braces, trunnion
beams, and truck beams etc., that sustain loads originating at the
ground, and that are not integral parts of the airframe structure,
should be designed and validated in accordance with this document.
Hydraulic actuators (retraction, main and nose gear steering,
positioning, damping, etc.) should also be included in this
coverage.
System level, non-structural components such as
retraction/extension valves, controllers, secondary structure and
mechanisms in the airframe (e.g., manual release mechanisms, slaved
doors) as well as equipment that is located in the cockpit are not
addressed in this ARP.
Purpose
This document establishes minimum recommended design
requirements and validation for landing gear structure and
mechanisms. In addition, recommended guidelines regarding
priorities in landing gear structural design particularly in the
early design stages is provided.