Abstract: A radial tire for airplane comprises a pair of bead cores, a radial carcass, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt(N) satisfies Tbelt/WD?1.5×106 when an outer diameter of the tire is D (m) and a width of the tire is W (m), and at least one layer of the belt layers is constituted with an organic fiber cord spirally winding at an angle of approximately 0° with respect an equatorial plane of the tire and satisfying the following equations (I) and (II): ???0.01E+1.2??(I) ??0.02??(II) (wherein ? is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).

Abstract: A pneumatic radial tire for airplane comprises a pair of bead cores, a radial carcass comprised of at least two carcass plies, in which the radial carcass is comprised of at least one turnup ply having a main body portion and a turnup portion and at least one down ply, wherein a radially total strength Tply (N) of the organic fiber cords constituting the main body portion of the turnup ply and the down ply at a position corresponding to a maximum width of the tire, a maximum tire width W (m) and a tire outer diameter D (m) satisfies the following equation (I): Tply/WD?4.0×106??(I) and the organic fiber cord constituting at least one ply of the at least two carcass plies is a polyketone fiber cord satisfying the following equations (II) and (III): ???0.01E+1.2??(II) ??0.02??(III) (wherein ? is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).

Abstract: A radial tire for airplane comprises a pair of bead cores, a radial carcass, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt(N) satisfies Tbelt/WD?1.5×106 when an outer diameter of the tire is D (m) and a width of the tire is W (m), and at least one layer of the belt layers is constituted with an organic fiber cord extending zigzag in the circumferential direction and satisfying the following equations (I) and (II): ???0.01E+1.2??(I) ??0.02??(II) (wherein ? is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).

Abstract: A radial tire for airplane comprises a pair of bead cores, a radial carcass, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt(N) satisfies Tbelt/WD?1.5×106 when an outer diameter of the tire is D (m) and a width of the tire is W (m), and at least one layer of the belt layers is constituted with an organic fiber cord extending zigzag in the circumferential direction and satisfying the following equations (I) and (II): ???0.01E+1.2 ??(I) ??0.02??(II) (wherein ? is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).

Abstract: A radial tire for airplane comprises a pair of bead cores, a radial carcass, and a belt disposed on an outer periphery of a crown portion of the radial carcass and comprised of plural belt layers each containing organic fiber cords, in which a total strength in a circumferential direction over a full width of the belt Tbelt(N) satisfies Tbelt/WD?1.5×106 when an outer diameter of the tire is D (m) and a width of the tire is W (m), and at least one layer of the belt layers is constituted with an organic fiber cord spirally winding at an angle of approximately 0° with respect an equatorial plane of the tire and satisfying the following equations (I) and (II): ???0.01E+1.2 ??(I) ??0.02 ??(II) (wherein ? is a heat shrinkage stress at 177° C. (cN/dtex) and E is an elastic modulus at 25° C. under a load of 49 N (cN/dtex)).