GB/T 9747-2026 Test methods for aircraft tyres English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 9747-2026
Replaces GB/T 9747-2008
Test methods for aircraft tyres
航空轮胎试验方法
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Dynamic Performance Test
5 Overpressure Performance Test
6 Static Load Performance Test
7 Weight Determination
8 Outer Dimension Measurement Test
9 Tubeless Tyre Air Retention Performance Test
10 Bead Sealing Pressure Test Method for Tube type Tyres — Electrical Measurement Method
11 Cross Sectional Analysis Measurement Method
12 X Ray Inspection Method
13 Holographic Inspection Method
14 Laser Digital Non Destructive Inspection Method
15 Static Imbalance Test Method
16 Physical Property Test
17 Bead Resistance to High Temperature Test Method
18 Environmental Adaptability Test Method
Test methods for aircraft tyres
1 Scope
This document describes the test specimens, test equipment, test conditions, test methods and test reports for the dynamic performance, overpressure performance, static load performance, weight determination, outer dimension measurement, tubeless tyre air retention performance, bead sealing pressure for tube type tyres, cross sectional analysis measurement, X ray inspection, holographic inspection, laser digital non destructive inspection, static imbalance, physical properties, bead resistance to high temperature, and environmental adaptability tests of aircraft tyres.
This document applies to civil aircraft tyres (hereinafter referred to as "tyres").
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 521 Methods of measuring external dimensions for tyres
GB/T 528 Rubber, vulcanized or thermoplastic — Determination of tensile stress strain properties
GB/T 531.1 Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1: Shore durometer method (Shore hardness)
GB/T 532 Rubber, vulcanized or thermoplastic — Determination of adhesion between rubber and fabric
GB/T 1682 Rubber, vulcanized — Determination of low temperature brittleness — Single test piece method
GB/T 1689 Rubber, vulcanized — Determination of abrasion resistance (Akron machine)
GB/T 2941 Rubber — General procedures for specimen preparation and conditioning for physical test methods
GB/T 3512 Rubber, vulcanized or thermoplastic — Accelerated aging and heat resistance — Hot air method
GB/T 6326 Tyres — Terms and definitions
GB/T 9101 Dipped nylon 66 tyre cord fabric
GB/T 9102 Dipped nylon 6 tyre cord fabric
GB/T 9746 Series of aircraft tyres
GB/T 13652 Surface quality of aircraft tyres
GB/T 22037 Bead sealing pressure test method for tube type aircraft tyres — Electrical measurement method
GB/T 22039 Laser digital non destructive inspection method for aircraft tyres
GB/T 23664 Non destructive test method for automotive tyres — X ray method
HG/T 2198 General requirements of physical test methods for vulcanized rubber
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 6326 and the following apply.
3.1 free section height
Half the difference between the overall tyre diameter and the diameter of the rim flange, when the tyre is properly inflated.
4 Dynamic Performance Test
4.1 Test specimen
The test tyre shall meet the following requirements:
a) Use one tyre to complete the dynamic performance test specified in this document;
b) After vulcanisation, the tyre shall be stored at ambient temperature for not less than 24 h;
c) The surface quality of the test tyre shall comply with the provisions of GB/T 13652;
d) The tyre shall not slip on the rim during the first five test runs. Slipping occurring during subsequent runs shall not damage the bead airtight layer of a tubeless tyre or the inner tube valve of a tube type tyre.
4.2 Test equipment
The test equipment shall meet the tyre test requirements, and the errors for speed and load shall not exceed 1%.
4.3 Test conditions
4.3.1 Test load
Unless otherwise specified, the test load on the tyre shall be not less than the rated load of the tyre in GB/T 9746.
4.3.2 Test inflation pressure
The test inflation pressure shall be the inflation pressure at which the load radius of the tyre on the test flywheel is equal to the load radius of the tyre on a flat surface under the rated load and rated inflation pressure conditions. The above two measurements shall be carried out under the same ambient temperature. The test inflation pressure shall not be adjusted to compensate for changes in inflation pressure caused by temperature variations during the test.
4.3.3 Correction of test inflation pressure
To compensate for the effect of the curvature of the test machine flywheel, the tyre inflation pressure shall be corrected. The correction method is as follows:
a) Apply the rated load to the tyre at the same temperature so that its static load radius on the test machine flywheel is equal to its static load radius on a flat surface;
b) Unless otherwise specified, correct the tyre inflation pressure according to the relationship diagram shown in Figure 1;
c) The test inflation pressure shall not be adjusted to compensate for changes in inflation pressure caused by temperature variations during the test.
4.3.4 Tyre cooling after test
After each test run, the tyre shall be cooled to the specified temperature before performing the next test run.
4.4 Test method
4.4.1 Number of test runs
The tyre shall complete 50 take off runs, 8 taxi runs, 2 taxi runs at 1.2 times the rated load, and 1 take off run at 1.5 times the rated load.
4.4.2 Test temperature
The gas temperature within the tyre cavity or the temperature at the hottest point of the tyre carcass shall comply with the following provisions:
a) At the start of the overload take off run and for at least 45 of the 50 take off runs, the temperature shall not be lower than 41 °C;
b) For at least 9 of the 10 taxi runs, the temperature at the start of the run shall not be lower than 49 °C;
c) For the remaining test runs, the gas temperature within the tyre cavity or the tyre carcass temperature at the start of the run shall not be lower than 27 °C. The starting temperature may be achieved by rolling the tyre on the test flywheel.
4.4.3 Test speed
The test speeds corresponding to the maximum take off speed are shown in Table 1. If the take off speed exceeds 394 km/h, the tyre shall be tested according to the most severe load speed time requirements, and the appropriate rated speed shall be determined accordingly.
4.4.4 Test procedure
4.4.4.1 Take off test
Unless otherwise specified, the relationship curves of load, speed and distance for the tyre during the take off test shall comply with the provisions of Figure 2, Figure 3 or Figure 4. Among these:
a) Figure 2 applies to tyres with rated speeds of 193 km/h and 257 km/h;
b) Figure 3 applies to tyres with rated speeds greater than 257 km/h;
c) Figure 4 applies to tyres with other rated speeds. Unless otherwise specified, the test load, speed and distance shall be selected according to the most severe take off conditions of the tyre.
4.4.4.2 Overload take off test
The overload take off test is the same as specified for the take off test (4.4.4.1), except that the test load is increased to 1.5 times the rated load.
4.4.4.3 Taxi test
The tyre shall complete 10 taxi runs according to the test conditions specified in Table 2.
4.4.5 Determination of tyre inflation pressure
The determination of tyre inflation pressure shall comply with the following requirements:
a) Unless otherwise specified, measure the tyre inflation pressure after every 5 test runs. After the first 5 test runs, cool the gas temperature within the tyre cavity or the hottest point of the tyre carcass to the temperature used for the corrected pressure, then measure the inflation pressure. If the measured tyre inflation pressure is lower than the corrected pressure, re inflate the tyre.
b) After the 10th test run, measure the pressure after every 10 test runs. If the measured tyre inflation pressure is lower than the specified value, re inflate the tyre. If the pressure is higher than the corrected pressure, it is considered to be due to an increase in temperature, and this pressure increase shall not be adjusted.
Standard
GB/T 9747-2026 Test methods for aircraft tyres (English Version)
GB/T 9747-2026 Test methods for aircraft tyres English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 9747-2026
Replaces GB/T 9747-2008
Test methods for aircraft tyres
航空轮胎试验方法
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Dynamic Performance Test
5 Overpressure Performance Test
6 Static Load Performance Test
7 Weight Determination
8 Outer Dimension Measurement Test
9 Tubeless Tyre Air Retention Performance Test
10 Bead Sealing Pressure Test Method for Tube type Tyres — Electrical Measurement Method
11 Cross Sectional Analysis Measurement Method
12 X Ray Inspection Method
13 Holographic Inspection Method
14 Laser Digital Non Destructive Inspection Method
15 Static Imbalance Test Method
16 Physical Property Test
17 Bead Resistance to High Temperature Test Method
18 Environmental Adaptability Test Method
Test methods for aircraft tyres
1 Scope
This document describes the test specimens, test equipment, test conditions, test methods and test reports for the dynamic performance, overpressure performance, static load performance, weight determination, outer dimension measurement, tubeless tyre air retention performance, bead sealing pressure for tube type tyres, cross sectional analysis measurement, X ray inspection, holographic inspection, laser digital non destructive inspection, static imbalance, physical properties, bead resistance to high temperature, and environmental adaptability tests of aircraft tyres.
This document applies to civil aircraft tyres (hereinafter referred to as "tyres").
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 521 Methods of measuring external dimensions for tyres
GB/T 528 Rubber, vulcanized or thermoplastic — Determination of tensile stress strain properties
GB/T 531.1 Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1: Shore durometer method (Shore hardness)
GB/T 532 Rubber, vulcanized or thermoplastic — Determination of adhesion between rubber and fabric
GB/T 1682 Rubber, vulcanized — Determination of low temperature brittleness — Single test piece method
GB/T 1689 Rubber, vulcanized — Determination of abrasion resistance (Akron machine)
GB/T 2941 Rubber — General procedures for specimen preparation and conditioning for physical test methods
GB/T 3512 Rubber, vulcanized or thermoplastic — Accelerated aging and heat resistance — Hot air method
GB/T 6326 Tyres — Terms and definitions
GB/T 9101 Dipped nylon 66 tyre cord fabric
GB/T 9102 Dipped nylon 6 tyre cord fabric
GB/T 9746 Series of aircraft tyres
GB/T 13652 Surface quality of aircraft tyres
GB/T 22037 Bead sealing pressure test method for tube type aircraft tyres — Electrical measurement method
GB/T 22039 Laser digital non destructive inspection method for aircraft tyres
GB/T 23664 Non destructive test method for automotive tyres — X ray method
HG/T 2198 General requirements of physical test methods for vulcanized rubber
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 6326 and the following apply.
3.1 free section height
Half the difference between the overall tyre diameter and the diameter of the rim flange, when the tyre is properly inflated.
4 Dynamic Performance Test
4.1 Test specimen
The test tyre shall meet the following requirements:
a) Use one tyre to complete the dynamic performance test specified in this document;
b) After vulcanisation, the tyre shall be stored at ambient temperature for not less than 24 h;
c) The surface quality of the test tyre shall comply with the provisions of GB/T 13652;
d) The tyre shall not slip on the rim during the first five test runs. Slipping occurring during subsequent runs shall not damage the bead airtight layer of a tubeless tyre or the inner tube valve of a tube type tyre.
4.2 Test equipment
The test equipment shall meet the tyre test requirements, and the errors for speed and load shall not exceed 1%.
4.3 Test conditions
4.3.1 Test load
Unless otherwise specified, the test load on the tyre shall be not less than the rated load of the tyre in GB/T 9746.
4.3.2 Test inflation pressure
The test inflation pressure shall be the inflation pressure at which the load radius of the tyre on the test flywheel is equal to the load radius of the tyre on a flat surface under the rated load and rated inflation pressure conditions. The above two measurements shall be carried out under the same ambient temperature. The test inflation pressure shall not be adjusted to compensate for changes in inflation pressure caused by temperature variations during the test.
4.3.3 Correction of test inflation pressure
To compensate for the effect of the curvature of the test machine flywheel, the tyre inflation pressure shall be corrected. The correction method is as follows:
a) Apply the rated load to the tyre at the same temperature so that its static load radius on the test machine flywheel is equal to its static load radius on a flat surface;
b) Unless otherwise specified, correct the tyre inflation pressure according to the relationship diagram shown in Figure 1;
c) The test inflation pressure shall not be adjusted to compensate for changes in inflation pressure caused by temperature variations during the test.
4.3.4 Tyre cooling after test
After each test run, the tyre shall be cooled to the specified temperature before performing the next test run.
4.4 Test method
4.4.1 Number of test runs
The tyre shall complete 50 take off runs, 8 taxi runs, 2 taxi runs at 1.2 times the rated load, and 1 take off run at 1.5 times the rated load.
4.4.2 Test temperature
The gas temperature within the tyre cavity or the temperature at the hottest point of the tyre carcass shall comply with the following provisions:
a) At the start of the overload take off run and for at least 45 of the 50 take off runs, the temperature shall not be lower than 41 °C;
b) For at least 9 of the 10 taxi runs, the temperature at the start of the run shall not be lower than 49 °C;
c) For the remaining test runs, the gas temperature within the tyre cavity or the tyre carcass temperature at the start of the run shall not be lower than 27 °C. The starting temperature may be achieved by rolling the tyre on the test flywheel.
4.4.3 Test speed
The test speeds corresponding to the maximum take off speed are shown in Table 1. If the take off speed exceeds 394 km/h, the tyre shall be tested according to the most severe load speed time requirements, and the appropriate rated speed shall be determined accordingly.
4.4.4 Test procedure
4.4.4.1 Take off test
Unless otherwise specified, the relationship curves of load, speed and distance for the tyre during the take off test shall comply with the provisions of Figure 2, Figure 3 or Figure 4. Among these:
a) Figure 2 applies to tyres with rated speeds of 193 km/h and 257 km/h;
b) Figure 3 applies to tyres with rated speeds greater than 257 km/h;
c) Figure 4 applies to tyres with other rated speeds. Unless otherwise specified, the test load, speed and distance shall be selected according to the most severe take off conditions of the tyre.
4.4.4.2 Overload take off test
The overload take off test is the same as specified for the take off test (4.4.4.1), except that the test load is increased to 1.5 times the rated load.
4.4.4.3 Taxi test
The tyre shall complete 10 taxi runs according to the test conditions specified in Table 2.
4.4.5 Determination of tyre inflation pressure
The determination of tyre inflation pressure shall comply with the following requirements:
a) Unless otherwise specified, measure the tyre inflation pressure after every 5 test runs. After the first 5 test runs, cool the gas temperature within the tyre cavity or the hottest point of the tyre carcass to the temperature used for the corrected pressure, then measure the inflation pressure. If the measured tyre inflation pressure is lower than the corrected pressure, re inflate the tyre.
b) After the 10th test run, measure the pressure after every 10 test runs. If the measured tyre inflation pressure is lower than the specified value, re inflate the tyre. If the pressure is higher than the corrected pressure, it is considered to be due to an increase in temperature, and this pressure increase shall not be adjusted.
