Aircraft Nose Landing Gear Fork Forgings — The Yoke-Shaped Structure Carrying the Nose Wheel Axle Under Steering and Impact Load
Shivam Forge manufactures forged aircraft nose landing gear fork components — the yoke-shaped structure straddling and carrying the nose wheel axle, reacting touchdown impact, steering torque, and shimmy loads distinct from the main landing gear strut assembly — in high-strength alloy steel and titanium, with manufacturing process control aligned to AS9100 quality management principles. Rajkot, India. Call +91-9265772827.
The nose gear fork (also called the nose wheel yoke) is the component at the base of the nose landing gear strut that straddles the nose wheel or wheel pair and carries the axle they rotate on — a structural role distinct from the strut piston and cylinder forgings covered elsewhere on this site, which handle the oleo-pneumatic shock absorption function further up the same assembly. What makes the fork's design problem genuinely specific to the nose gear position, rather than shared with main landing gear structure, is that the nose fork typically also functions as the steering structure: it rotates (directly or through a steering collar it's integrated with) to turn the nose wheel during ground taxi and takeoff/landing roll directional control, meaning the fork must react steering torque loads in addition to the vertical touchdown impact and lateral loads any landing gear wheel-carrying structure experiences. This combination introduces a further loading concern largely unique to nose gear: wheel shimmy, a self-excited lateral oscillation that can develop in a castering or steerable nose wheel assembly under certain speed and loading conditions, which the fork structure and its attachment to the strut must be stiff enough to resist without developing a resonant response. Nose gear also generally carries a smaller, though still substantial, fraction of aircraft weight than main gear, but experiences proportionally higher dynamic loading during derotation (nose-down touchdown following the main gear) and during high-speed steering maneuvers, meaning fork forgings are engineered for a combined torsional-steering, impact, and shimmy-resistant stiffness profile that is genuinely distinct from main gear strut and trunnion design.
Forged fork blanks straddling the nose wheel or wheel pair and carrying the axle, engineered for the combined vertical touchdown impact, steering torque, and shimmy-resistant stiffness the nose gear position specifically requires.
Forged interface components connecting the fork to the steering actuation system and torque link, transmitting steering torque into the fork while maintaining rotational alignment through the steering range of motion.
Forged axle and wheel bearing interface features integral to or mounted within the fork structure, maintaining the dimensional precision the nose wheel bearing arrangement requires through repeated impact and steering cycling.
Forged attachment components joining the fork assembly to the nose gear strut, carrying the full nose gear load reaction into the strut and, through it, into the airframe structure.
Material grade selection among high-strength alloy steels and titanium alloys, balancing strength-to-weight against the fracture toughness and stiffness the fork's combined impact-torsional-shimmy loading profile requires.
Forging and design attention to fork structural stiffness sufficient to resist wheel shimmy — the self-excited lateral oscillation that can develop in steerable nose wheel assemblies under certain speed and loading conditions.
Forging process and heat treatment oriented toward fatigue and fracture toughness performance under the fork's combined derotation impact and repeated steering torque loading across the aircraft's operating life.
Manufacturing process control aligned to AS9100 quality management principles, with full material chemistry, mechanical property, and NDT documentation supporting AMS-referenced specification requirements.
Nose landing gear occupies a structurally distinct position from main landing gear in ways that go well beyond simply carrying less of the aircraft's weight. The nose gear fork — the yoke-shaped structure at the base of the nose gear strut that straddles the nose wheel or wheel pair and carries the axle they rotate on — has to do something main gear structure generally doesn't: steer. In most nose gear architectures, the fork rotates, either directly or through an integrated steering collar, to provide ground directional control during taxi, takeoff roll, and landing roll, meaning the fork's load case includes steering torque as a genuine structural design driver, layered on top of the vertical touchdown impact and lateral loading any wheel-carrying landing gear structure must survive.
This steering function introduces a loading concern that is essentially unique to nose gear among the landing gear structural components on an aircraft: wheel shimmy, a self-excited lateral oscillation that can develop in a castering or steerable wheel assembly under particular combinations of speed, loading, and structural compliance. Left unaddressed through adequate structural stiffness, a shimmy-prone nose gear can develop a resonant oscillation during ground operations that ranges from an uncomfortable nuisance to a genuine safety and structural fatigue concern, which is why fork design and forging attention extends beyond simple strength and fatigue considerations to include the structural stiffness needed to keep the fork and its strut attachment outside the conditions where shimmy can develop.
The fork also experiences a distinct impact loading signature tied specifically to its position on the aircraft: nose gear touchdown during a normal landing typically follows main gear touchdown, in an event called derotation, where the aircraft's nose progressively lowers and the nose wheel contacts the runway carrying a meaningfully dynamic, if generally lower magnitude, impact load compared to main gear's touchdown case. Combined with the steering torque and shimmy-resistance requirements layered on top, this gives nose gear fork forgings a genuinely distinct combined design load case from main gear strut and trunnion structures, driving both material selection — high-strength alloy steel or titanium, chosen for the specific balance of strength-to-weight and fracture toughness the aircraft's weight class requires — and forging process discipline oriented toward fatigue performance under this combined torsional-impact-shimmy loading profile.
For airframe and landing gear system manufacturers sourcing forged nose gear fork, steering collar, and axle interface components, Shivam Forge manufactures high-strength steel and titanium nose gear fork forgings with manufacturing process control aligned to AS9100 quality management principles and full AMS-referenced material documentation. Contact our engineering team at +91-9265772827 or sales@shivamforge.com with your fork drawing and material specification for a manufacturability review and quotation.
Our landing gear strut page covers the oleo-pneumatic shock strut piston and cylinder — the energy-absorbing damper structure. The nose gear fork is the yoke-shaped structure at the base of the strut that straddles the nose wheel and carries its axle, and which — unlike most main gear structure — typically also functions as the steering structure, reacting steering torque in addition to impact load.
A steerable or castering nose wheel assembly can develop shimmy, a self-excited lateral oscillation, under certain speed and loading conditions. The fork structure and its attachment to the strut must be stiff enough to resist developing a resonant response to this phenomenon, which is a design consideration largely unique to nose gear given its steering function.
Yes, in most nose gear architectures. The fork rotates, directly or through an integrated steering collar, to turn the nose wheel for ground directional control, meaning it must react steering torque loads in addition to the vertical touchdown impact and lateral loads any wheel-carrying landing gear structure experiences — a combined loading profile distinct from most main gear structure.
High-strength alloy steels and titanium alloys are the primary material families, selected based on the target aircraft's weight class and the specific balance the design calls for between strength-to-weight, fracture toughness, and shimmy-resistant stiffness. Provide your material specification and load case and our engineering team will confirm forging feasibility.
Our manufacturing process control is aligned to AS9100 quality management principles, and full material chemistry, mechanical property, and NDT documentation is provided supporting AMS-referenced specification requirements. Contact our engineering team directly to discuss current quality certification status for your specific program.
Why Choose Shivam Forge
Shivam Forge delivers precision hot-forged components from our integrated Shapar, Rajkot facility — covering forging, CNC machining, heat treatment, and quality inspection under one roof.
