scope:

THE TIRE SHALL BE IN ACCORDANCE WITH THE APPLICABLE REQUIREMENTS OF SPECIFICATION MIL-T-5041 EXCEPT AS SPECIFIED HEREIN

INFLATED DIMENSIONS @ 355 PSI (INCH) CROSS SECTION SHOULDER WIDTH SHOULDER DIAMETER OUTSIDE DIAMETER MIN MAX MIN MAX MAX MIN MAX 5.35 5.70 - 4.95 23.30 23.55 24.15

THE TIRE SHALL BE SUITABLE FOR USE AND PROVIDE REASONABLE SERVICE LIFE DURING ALL NORMAL OPERATIONS AT TAKE-OFF SPEEDS OF NOT MORE THAN 200 MPH AND LANDING SPEEDS OF NOT MORE THAN 185 MPH ON ALL TYPES OF RUNWAYS AND ON AIRCRAFT CARRIERS.

TEST TIRE NUMBER 1 SHALL WITHSTAND TESTS A AND B WITHOUT FAILURE AND THEN USED FOR TEST C.

TEST TIRE NUMBER 2 SHALL WITHSTAND TESTS D AND E WITHOUT FAILURE AND THEN USED FOR TEST C.

TEST TIRE NUMBER 3 SHALL WITHSTAND A MINIMUM HYDROSTATIC BURST PRESSURE OF 1420 PSI. THE FAILING PRESSURE, DESCRIPTION OF FAILURE AND LOCATION SHALL BE REPORTED IN THE QUALIFICATION TEST REPORT AS TEST F.

TEST A - BRUISE TESTS - A NEW TIRE SHALL BE INFLATED WITH AIR TO 475 PSI AND LOADED AGAINST A ONE AND THREE EIGHTHS INCH (1-⅜") DIAMETER LENGTH OF PLAIN ROUND BAR STOCK OR CABLE. A VERTICAL LOAD OF 52,000 POUNDS SHALL BE APPLIED WITH THE VERTICAL CENTER-LINE OF THE MOUNTED TIRE MAKING AN ANGLE OF 87 DEGREES WITH THE PLATEN. IMMEDIATELY FOLLOWING THE RELEASE OF THIS LOAD THE TIRE SHALL BE SUBJECTED TO THE SAME LOADING CONDITION AT A SPOT 180 DEGREES FROM THE INITIAL POINT OF LOADING. TEST B - DYNAMIC TEST - FOLLOWING TEST A, THE SAME TIRE SHALL BE SUBJECTED TO 25 DYNAMOMETER LANDINGS AGAINST A FLYWHEEL ROTATING AT A PERIPHERAL SPEED OF 185 MPH. THE FLYWHEEL SPEED SHALL BE DECREASED UNTIL A ROLL DISTANCE OF 5500 FEET HAS BEEN COVERED, AT WHICH TIME THE TIRE SHALL BE UNLANDED. THE AVERAGE DECELERATION RATE SHALL BE 6.6 FT/SEC/SEC THROUGHOUT THE RUN. THE TIRE LOAD SHALL BE INCREASED TO 5000 POUNDS WITHIN ONE SECOND OF LANDING AND FURTHER INCREASED LINEARLY WITH TIME TO A MAXIMUM OF 11,500 POUNDS WITHIN 14 TO 16 SECONDS AFTER LANDING. THE LOAD SHALL THEN BE MAINTAINED AT 11,500 POUNDS UNTIL THE TIRE IS UNLANDED AT APPROXIMATELY 37 SECONDS FROM TIME OF LANDING. THE INFLATION PRESSURE SHALL BE VARIED AS NECESSARY TO OBTAIN A STATIC INFLECTION OF 32% ON THE FLYWHEEL SURFACE AT A LOAD OF 11,500 POUNDS. TEST C - BURST TEST NO.1 - FOLLOWING TEST B, THE SAME TIRE SHALL BE SUBJECTED TO A HYDROSTATIC BURST TEST, THE PRESSURE SHALL BE INCREASED UNTIL THE TIRE FAILS AND THE FAILING PRESSURE, DESCRIPTION OF FAILURE AND LOCATION SHALL BE REPORTED IN THE QUALIFICATION TEST REPORT. TEST D - YAW TEST - A NEW TIRE SHALL BE SUBJECTED TO 25 CYCLES OF TEST D₁ AND 25 CYCLES OF TEST D₂ FOR A TOTAL OF 50 CYCLES. TEST D₁ - 1. (25 CYCLES) LAND TIRE ON FLYWHEEL ROTATING AT A PERIPHERAL SPEED OF 30 MPH WITH A PRE-SELECTED 3 DEGREE YAW ANGLE RELATIVE TO THE DYNAMOMETER. 2. INCREASE LOADING UNTIL THE TIRE IS LOADED WITH A RADIAL LOAD (IN THE WHEEL PLANE PERPENDICULAR TO FLYWHEEL) OF 11,500 POUNDS. 3. UNLAND THE TIRE WHEN A DISTANCE OF 300 FEET HAS BEEN COMPLETED WITH FULL LOAD. TEST D₂ - (25 CYCLES) SAME AS TEST "D₁", EXCEPT THE 3 DEGREE YAW ANGLE SHALL BE APPLIED IN THE OPPOSITE DIRECTION. TEST E - TAKEOFF TEST - FOLLOWING TEST D, THE SAME TIRE SHALL BE SUBJECTED TO 50 TAXI TAKEOFF CYCLES. THE VERTICAL CENTERLINE OF THE MOUNTED TIRE SHALL MAKE AN ANGLE OF 87 DEGREES WITH THE DYNAMOMETER FLYWHEEL AND THE LOAD APPLIED ON THE TIRE INBOARD SIDE. THE TIRE SHALL BE TAXIED ON THE FLYWHEEL AT 30 MPH FOR 10,000 FEET WITH 11,500 POUNDS LOAD. UPON COMPLETION OF THE TAXI ROLL, THE FLYWHEEL SHALL BE ACCELERATED AT AN AVERAGE RATE OF 4.6 FEET/SEC/SEC FROM 30 MPH TO A SPEED OF 200 MPH. THE TIRE SHALL BE UNLANDED AFTER A TAKEOFF ROLL DISTANCE OF 9,000 FEET HAS BEEN COVERED IN APPROXIMATELY 53 TO 55 SECONDS. THE LOAD SHALL BE MAINTAINED AT 11,500 POUNDS FOR THE FIRST 6 SECONDS AFTER THE START OF THE TAKEOFF ROLL, AT WHICH TIME IT SHALL BE DECREASED LINEARLY WITH TIME TO 1,000 POUNDS AT 51 SECONDS AFTER THE START OF THE TAKEOFF ROLL AND DECREASED TO ZERO POUNDS AT THE TIME THE TIRE IS UNLANDED. THE TIRE DEFLECTION AT RATED LOAD ON THE FLYWHEEL, SHALL BE THE SAME AS OBTAINED WITH THE RATED LOAD AND INFLATION PRESSURE ON A FLAT PLATE. TEST F - BURST TEST No. 2 - A NEW TIRE SHALL WITHSTAND A MINIMUM HYDROSTATIC BURST PRESSURE OF 1420 PSI.

[B circled] REVISED AND REDRAWN This military standard is approved by NAVAL AIR SYSTEMS COMMAND, Department of the Navy and shall be used by that activity. All other military activities are required to employ this standard where suitable.

QUALIFICATION TEST REPORT - THE QUALIFICATION TEST REPORT SHALL LIST THE RESULTS OF ALL QUALIFICATION TESTS AND THE CONSTRUCTION TEST SAMPLE IN THE GENERAL FORM SHOWN IN FIGURE 6 AND 7 OF SPECIFICATION MIL-T-5041 WITH DIMENSIONS LISTED AT RATED INFLATION. IN ADDITION, IT SHALL ALSO LIST THE ACTUAL DIMENSIONS WHEN THE TIRE IS INFLATED TO 480 PSI. SUBMIT TWO (2) COPIES OF THE QUALIFICATION TEST REPORT, TOGETHER WITH THE DATA AND MATERIAL SPECIFIED ABOVE AND IN MIL-T-5041 TO THE NAVAL AIR SYSTEMS COMMAND, WASHINGTON, D.C. 20361 ATTENTION: AIR-530321.