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GB 9745-2009 English PDF

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GB 9745-2009: Aircraft tyres
Status: Valid

GB 9745: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB 9745-2009English189 Add to Cart 3 days [Need to translate] Aircraft tyres Valid GB 9745-2009
GB 9745-1995English519 Add to Cart 4 days [Need to translate] Aircraft tyre Obsolete GB 9745-1995
GB 9745-1988EnglishRFQ ASK 3 days [Need to translate] Aircraft tyre Obsolete GB 9745-1988

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Basic data

Standard ID GB 9745-2009 (GB9745-2009)
Description (Translated English) Aircraft tyres
Sector / Industry National Standard
Classification of Chinese Standard G41
Classification of International Standard 83.160.20
Word Count Estimation 8,861
Date of Issue 2009-12-15
Date of Implementation 2010-10-01
Older Standard (superseded by this standard) GB 9745-1995
Quoted Standard GB/T 6326; GB/T 9746; GB/T 9747; GB/T 13652; HG 2195
Adopted Standard ISO 3324-1-1997, NEQ
Regulation (derived from) Announcement of Newly Approved National Standards No. 15 of 2009 (total 155)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This Chinese standard specifies the requirements for aviation bias tires, test methods, inspection rules, marking, storage and use. This standard applies to all kinds of new civil aviation bias tires.

GB 9745-2009: Aircraft tyres

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Aircraft tyres ICS 83.160.20 G41 National Standards of People's Republic of China Replacing GB 9745-1995 Aircraft Tire (ISO 3324-1.1997Aircrafttyresandrims-Part 1. Specifications, NEQ) Published 2009-12-15 2010-10-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China issued

Foreword

This standard Chapter 4 and Chapter 7 are mandatory, the rest are recommended. This standard replaces GB 9745-1995 "aviation tires." This standard and ISO 3324-1.1997 "Aircraft Tire Part 1. Specification", the US Federal Aviation Administration Technical Standard Order TSO- C62e "aircraft tire" is not equivalent level of consistency. This major change compared to the standard GB 9745-1995 as follows. --- modify the scope (Chapter 1 of the 1995 edition; edition Chapter 1); --- adds a definition of (this version of Chapter 3); Increased 4.5 --- Pair claims and their test methods are the tubeless tire bead fit pressure on the skid gear rim (Excerpts of And 5.5); --- omitted suitability requirements for materials, materials resistant to high temperature, and the tire weight and physical properties Test method (1995 edition 4.2,4.4,4.10,4.14,5.2 and 5.9); --- modify the requirements for static unbalance of tire (1995 edition 4.12; edition 4.6); --- Chapter 6 will adjust Annex A is informative (Chapter 6 of the 1995 edition; edition Chapter 6); --- deleted PACKING (1995 edition 7.2); --- modify the tire marks, storage and use (Chapter 7 of the 1995 edition; edition Chapter 7). Appendix A of this standard is an informative annex. The standard proposed by China Petroleum and Chemical Industry Association. This standard technical committee of the National Tire and Rim Standardization Technical Committee centralized aircraft tire division. This standard was drafted. Rubber Group Shuguang Rubber Industry Research and Design Institute. The main drafters. RUBBER Zhou Birong, Zhang Hong, Qi Liping. This standard replaces the previous version published case. --- GB 9745-1988, GB 9745-1995. Aircraft Tire Range 1 This standard specifies the requirements for aviation bias tires, test methods, inspection rules, marking, storage and use. This standard applies to all types of new civil aviation bias tires.

2 Normative references

Terms of the following documents become provisions of this standard by reference in this standard. For dated reference documents, all later Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to agreements based on this standard Whether the latest versions of these documents. For undated references, the latest version applies to this standard. GB/T 6326 tire terms and definitions (GB/T 6326-2005, ISO 4223-1.2002, NEQ) GB/T 9746 series aviation tires GB/T 9747 aviation tire test methods GB/T 13652 Air quality tire surface HG2195 aviation and maintenance of tires

3 Terms and Definitions

GB/T 6326 and established the following terms and definitions apply to this standard. 3.1 The tire under rated load conditions, the pneumatic pressure corresponding to the value of the static load of the radius.

4 Requirements

4.1 Size, static load rating and the radius 4.1.1 Expression specifications, new tires inflated size, rated load, inflation pressure and static rated load radius should conform to GB/T 9746 Regulation set. GB/T 9746 no no predetermined specifications or the shoulder of the tire size, the maximum size should shoulder of formula (1) and (2) below. WS = 0.9W (1) HS = 0.9H (2) Where. The WS --- pneumatic tire maximum tire shoulder; --- W is the maximum cross-sectional width of the pneumatic tire 1); 1) The maximum cross-sectional width of the sidewall includes a flag, scuff decorative lines and line height of the projection, but does not include highly water guide rib of the front tire rubber. HS --- pneumatic tire maximum shoulder height; High H --- pneumatic tire maximum section. 4.1.2 Common for helicopter aircraft tires, which in the normal aircraft tire load rating multiplied by 1.50 to determine the rated load, the inflation pressure is also Shall accordingly multiplied by 1.50, without any additional qualification tests. 4.2 Dynamic Performance 4.2.1 low tires must landings 200, wherein the low-speed and high-speed landings landings 100 times each. 4.2.2 High-speed tires must takeoff test 50 times rated load, 1 to 1.5 times the rated load overload takeoff test, coasting test 10, Wherein coasting test 8 times rated load 1.2 times and 2 times the rated load coasting test. 4.2.3 Tires shall meet the following requirements. When the dynamic test, an area out of any block or not exceed 6.25cm2 The depth is not greater than the depth of the groove 75%; block out at no more than 3 per 2.50cm2 to the area of 6.25cm2; at a site off the block 10 can not exceed the total area 25.00cm2. Full rubber tread groove can not have cracks. Fabric reinforced tire tread groove cracking and damage the base portion of the cord should not be Table 1 in any of its provisions. You can not have a lower groove cut opening. Table 1 tread reinforcing cord injury and fracture allowable range No. Name cord injury and fracture account the number of grooves Accounting circumference of the tire percentage/% A cord breaking at the cord breaking a groove pattern 30 2 cord breaking at the cord breaking groove pattern 40 accumulated all of the above two 3 cord injury cord injury in a groove pattern 65 4 cord injury cord injury in two groove patterns 95 accumulated over all 5 cord breaking and injuries and damage a cord breaking groove patterns 65 6 and injuries cord breaking at the cord breakage and damage than two groove patterns 95 of all accumulated 4.3 Performance overpressure Tire pressure and maintaining the pressure within the inflator 3s should burst to 4 times rated, bubbling, delamination, breaking wire or cord. 4.4 tubeless tire tightness The tire is mounted on a specified rim, inflated to the rated inflation pressure, parked least 12h at room temperature, adjusted to the rated inflatable Pressure, and then the parking at least 24h at room temperature, the rate of decline of the pneumatic pressure within the rated inflation pressure shall not exceed 5%. 4.5 with a slip gear mounted on the rim bead fit tubeless tire pressure 275kPa pressure less than or equal to the rated inflation of the tire, the bead fit pressure should reach 170kPa ~ 280kPa; Rated inflation pressure of the tire 275kPa ~ 690kPa, bead adhesion should reach the pressure value to a rated pressure of 170kPa; Rated inflation pressure of 690kPa or more tire bead fit pressure should reach 350kPa or more, but not more than the tires rated Inflatable pressure value. 4.6 static unbalance Calcd maximum static unbalance M of the tire should not exceed the main formula (3). M = 0.00383D2 (3) Auxiliary tire maximum static unbalance M should exceed the calculated value of formula (4). M = 0.00274D2 (4) Where. --- M tire static unbalance predetermined value, in units of Newton centimeters (N · cm); D --- pneumatic tire maximum outer diameter in centimeters (cm). 4.7 surface quality Tire surface quality should be consistent with the provisions of GB/T 13652 of. 4.8 Internal defects There should be no air bubbles inside of the tire, delamination, wire breakage, fracture defects cords.

5 Test methods

5.1 Size and static loaded radius 5.1.1 Tire Size The pneumatic tire peripheral dimensions according to GB/T 9747 to measure. 5.1.2 Static load radius Static loaded radius by GB/T 9747 to measure. 5.2 Dynamic Performance Press dynamics GB/T 9747 test. 5.3 Performance overpressure Overpressure performance by GB/T 9747 test. 5.4 tubeless tire tightness Tightness of a tubeless tire according to GB/T 9747 test. 5.5 with a slip gear mounted on the rim of the tubeless tire bead fit pressure A non-slip gear mounted on the rim bead fit pressure tubeless tire according to GB/T 9747 test. 5.6 static unbalance Static unbalance by GB/T 9747 test. 5.7 surface quality Steel ruler and by visual inspection, the metal tape (without radian, accuracy ± 1.0mm) and a caliper (accuracy ± 0.02mm) and other equipment Detection of the tire. 5.8 Internal defects Internal defects by GB/T 9747 is detected.

6 Inspection Rules

See Appendix A. 7 flag, storage and use 7.1 marks 7.1.1 Running pores Pressure is higher than 686kPa tubeless tire due to pores run flag, the flag color other than red and a pneumatic tubeless tire. Tubeless Run eye hole depth not reaching the inner liner of the tire. 7.1.2 Ping Heng Flag Tire Ping Heng should sign. Tap the tire sidewall portion against the bead marked as a red dot Ping Heng flag. The tire mark It should be kept clear of the storage life of the tread rubber and the original. 7.1.3 Other signs In addition to running Ping Heng hole flag and the flag, the upper sidewall of the tire should have at least the following flags, where the terms a) ~ j) permanent marker. a) specification; b) level (or actual number of layers); c) product serial number and date of manufacture; d) tubeless tire shall be marked "tubeless" words; e) fabric reinforced tread should be labeled "reinforced tread" word; f) the rated speed, rated load model and tread depth; g) manufacturer's name and trademark; h) implementation of standards; i) Part Number; j) hallmarks. 7.2 Storage and use Tires should HG2195 predetermined storage and use; the date of manufacture, storage and use of the tire of time and should not exceed five years.

Appendix A

(Informative) testing regulations A. 1 batch of product groups Tire specifications and approved by the hierarchical group. Where in the case of continuous production date, production conditions substantially the same conditions, the same size, the same level Tires with 500 composed of a group or section 1000, more than 500 or 1000 of the group separately approved. A. 2 classification test Inspection is divided into two types of factory inspection and type test. Factory inspection refers to the product delivery inspection should be carried out. Inspection means Conduct a comprehensive assessment of product quality, which requires all the provisions of this standard be tested. A. 3 type test When one of the following cases, the type of inspection should be carried out. --- pattern evaluation trial production of new products or old products to the plant production; --- After formal production, such as structure, the main material, have a greater change process; When --- factory inspection results and the last type inspection results are quite different; --- proposed national quality watchdog on demand for type testing. A. 4 factory inspection Factory inspection consists of full inspection and sampling. A. 4.1 full inspection project a) static unbalance; b) the surface quality. A. 4.2 sampling project a) The pneumatic tire peripheral dimensions (not including the shoulder size); b) overpressure properties; c) a non-slip gear mounted on the rim of the tubeless tire airtight performance; d) adhesiveness, a bead of the tire pressure tube; e) internal defects. A. 5 sampling plan Sample by random sampling, in order to ensure the overall consistency of the sample. For the production of surface defects, but does not affect the test results Product sampling allowed to participate, but not designated as a sample. A. 5.1 Type inspection Extracting tire 2, a test for testing the dynamic performance of the tire, the other one at other predetermined items. If insufficient number of samples For all projects to test, you can double sampling. A. 5.2 factory inspection Inside of the tire defect inspection sample by 5% to 10% of each batch extraction; sample other items by sampling each batch extraction A test tire. A. 6 reinspection rules When sampling is found defective, then a double sampling allows retest. Re-inspection rules are as follows. a) The pneumatic tire peripheral dimensions, performance tubeless tire innerliners, tire performance test items overpressure, can randomly in the same batch of products Extracting two samples retest. 2 when the test results of samples are qualified, then the product can be ruled by inspection, or should be To not pass inspection; Internal b) taken after the tire defect inspection retest double sampling, not through, should be fully checked.

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