| 摘要 |
PROBLEM TO BE SOLVED: To provide a radial tire for an aircraft making enhancement of internal pressure retaining property and reduction of tire weight compatible in the tire using a polyketone fiber cord as an organic fiber cord of a carcass ply, and its manufacturing method. SOLUTION: The radial tire for the aircraft is provided with a pair of bead cores 4 and the radial carcass. In the polyketone fiber cord, total strength T of the organic fiber cord of the carcass ply 5, the tire maximum width W and a tire outer diameter D satisfy a relationship of formula (1): T/W*D≥4.0×10<SP>6</SP>, and thermal contraction stressσand modulus of elasticity E of the organic fiber cord satisfy a relationship of formula (2):σ≥-0.01E+1.2 and formula (3):σ≥0.02. Rubber thickness g<SB>t</SB>on a perpendicular vertically descended to a radial carcass at a ground-contact end position of a tread part 1 and rubber thickness g<SB>b</SB>on a perpendicular vertically descended from a heel part of a bead part 3 to the radial carcass at a position of 1/4 of the tire cross section height satisfy a relationship of formula (4): g<SB>t</SB>>0.5 (mm) and g<SB>b</SB>>0.5 (mm) and formula (5): 0.5<g<SB>t</SB>/g<SB>b</SB><1.5. COPYRIGHT: (C)2009,JPO&INPIT
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