restraint of leather seat covers during …...back • 3 loose wires each, back and bottom • 6...
TRANSCRIPT
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RESTRAINT OF LEATHER SEAT CUSHIONS DURING
APPENDIX F SEAT CUSHION (FIRE BLOCK)
TESTING
COLOGNE UPDATE
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MATERIALS EVOLUTION
• ORIGINALLY – FIRE BLOCKED CUSHIONS
• FIRE HARD FOAM• VARIABILITY OF RESULTS WITH
LEATHER• FULL CABIN USE OF LEATHER IN
TRANSPORT TYPE AIRCRAFT• “LEEWAY” IN RULES AND GUIDANCE
ON FASTENING – EFFECT ON PASS OR FAIL
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“GOOD” LEATHER
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“BAD” LEATHER
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TEST FASTENING METHODS
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TEST FASTENING METHODS
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TEST FASTENING METHODS
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OBJECTIVES• REVIEW OF AVAILABLE INFORMATION
ON THE SUBJECT (DONE)• SURVEY - REAL WORLD FASTENING
METHODS (DONE)• SURVEY - LAB FASTENING METHODS
(DONE)
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OBJECTIVES• RESEARCH – LEATHER OR TOP-COAT
SHRINKS? (CURRENT AND ONGOING)• RESEARCH EFFECT OF NUMBER OF
WIRES ON FABRIC AS BASELINE (CURRENT)
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SURVEY OF LEATHER PERFORMANCE
• 5 SAMPLES FROM EACH FULL HIDE:
NECK
RUMP
LEG
BELLY
ARMPIT
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SURVEY OF LEATHER PERFORMANCE
• 12 SECOND VERTICAL• 60 SECOND VERTICAL• SHRINK LENGTH RECORDED• SHRINK DEFINITION – DISTANCE FROM
THE LOWEST POINT OF THE TOP OF THE SAMPLE TO THE HIGHEST UNCHARRED POINT AT THE BOTTOM OF THE SAMPLE, SUBTRACTED FROM THE INITIAL SAMPLE LENGTH
• FIRE BLOCK PERFORMANCE
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SURVEY OF LEATHER PERFORMANCE
12 Sec. Test 60 Sec. Test
After Flame Char Shrinkage After Flame Char Shrinkage
Burn Time Length Length Burn Time Length Length
NECK 0.43 0.15 0.42 0.58 4.58 1.27
RUMP 0.45 0.11 0.33 0.25 4.33 1.27
FRONT LEG 0.53 0.14 0.37 0.13 4.77 1.32
BELLY 0.47 0.16 0.42 0.73 4.80 1.64
REAR ARMPIT 0.53 0.13 0.40 0.22 4.49 1.04
AVERAGE 0.48 0.14 0.39 0.38 4.59 1.31
STD DEV 0.05 0.02 0.04 0.26 0.20 0.22
STD DEV % OF AVG 9% 13% 10% 67% 4% 16%
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SURVEY OF LEATHER PERFORMANCE
• SAME MANUFACTURER, DIFFERENT COLORS, SEVERAL HIDES EACH COLOR
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8% SHRINK
23% SHRINK
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SURVEY OF LEATHER PERFORMANCE
• AS OIL BURNER TESTS DONE, RESULTS AND QUALITATIVE ASSESSMENT OF SHRINKAGE WILL BE RECORDED
• ONGOING DISCUSSION WITH MANUFACTURERS ABOUT CAUSES OF SHRINKAGE
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EFFECT OF WIRESBASELINE TESTS ON FABRIC
• 6 SCENARIOS TESTED:• SINGLE WIRE AT THE TOP OF THE
BACK• 3 LOOSE WIRES EACH, BACK AND
BOTTOM• 6 LOOSE WIRES EACH, BACK AND
BOTTOM• 3 TIGHT WIRES EACH, BACK AND
BOTTOM• 6 TIGHT WIRES EACH BACK AND
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SINGLE WIRE AT THE TOP OF THE BACK
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3 LOOSE WIRES EACH, BACK AND BOTTOM
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6 LOOSE WIRES EACH, BACK AND BOTTOM
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3 TIGHT WIRES EACH, BACK AND BOTTOM
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6 TIGHT WIRES EACH, BACK AND BOTTOM
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TRUSSED UP LIKE A CHRISTMAS TURKEY
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PERCENTAGE WEIGHT LOSS
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WHAT’S NEXT
• AGREE ON “PREFERRED METHOD” BY EMAIL, ONLINE GROUP: http://tech.groups.yahoo.com/group/IAMFTWG/
• GET LEATHER SUPPLIER –VOLUNTEERS?
• ROUND ROBIN – BEFORE NEXT MEETING ?
• EXPERIMENT – VELCRO FASTENING• PRESESNT RESULTS – FINAL
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QUESTIONS?