Crown reinforcements for aircraft tires

Abstract

The invention relates to a tire (1) for aircraft comprising a working reinforcement (2) arranged radially inside the tread (3) and radially outside a carcass reinforcement (4), said working reinforcement (2) comprising at least one radially innermost working double ply (21) having a maximum axial width (LT) and comprising two axial ends (E), the tread reinforcement comprising at least one Carcass layer (41). The distance (D) between the axial end (E) of the double ply (21) and its orthogonal projection (I) on the carcass layer (41) is greater than 8mm, and at the axial end ( E) The distance (D') between the point (F) of the double ply (21) with an axial inner distance (L) of 25mm and its orthogonal projection (J) on the carcass layer (41) is not greater than distance (D) such that the angle (A) equal to atan[(D‑D') / L] is greater than 12°.

Description

technical field [0001] The present invention relates to tires for aircraft and, in particular, to crown reinforcements for aircraft tires. Background technique [0002] Hereinafter, the circumferential, axial and radial directions respectively denote a direction tangential to the tread surface of the tire in the direction of rotation of the tire, a direction parallel to the rotation axis of the tire, and a direction perpendicular to the rotation axis of the tire. "Radially inside or radially outside" means "closer to or farther from the axis of rotation of the tire", respectively. "Axially inboard or axially outboard" means "closer to or away from, respectively, the equatorial plane of the tire," which is the plane passing through the middle of the tire's tread surface and perpendicular to the tire's axis of rotation. [0003] In general, a tire comprises a tread intended to come into contact with the ground through a tread surface connected by two sidewalls to two beads in...

AI Technical Summary

Problems solved by technology

[0023] Optimizing the geometrical profile of the second intermediate element, which is located axially inside the protective reinforcement and axially outside the working reinforcement, but this may lead to said second intermediate element following the tread premature exposure of the surface of the tread due to wear, thereby leading to the risk of accelerated tread wear;

[0024] The use of circumferential reinforcements for the working plies, in other words the reinforcements form a zero angle to the circumferential direction, which can lead to a decrease in the cornering stiffness of the tire and impairment of its centrifugal expansion profile control

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