inchI.D.tubeadjusted togivea .ameof1站inchesinheight.Theminimum .ame temperature, measured by a calibrated thermo-couple pyrometer in the center of the .ame must be 1,550'F. Suitable precautions must be taken to avoid drafts. The .amemustbeappliedfor30 secondswith one-third contacting thematerial at the center of the specimen and then removed.Flametime,glowtime, and whether the .amepenetrates(passesthrough) thespecimenmustberecorded.
(g) Sixty-degree test. A minimum of three specimens of each wire speci.cation (make and size) mustbe tested. The specimen of wire or cable(includinginsulation) must be placed at an angle of 60 degrees with the horizontal in the cabinet speci.ed in paragraph(c)ofthis appendix, withthe cabinetdoor openduringthe test orplaced
3
8
within a chamber approximately2feethigh x1foot x1foot, open at the top and at onevertical side(front),thatallowssu.cient .owof airforcompletecombustion but is free from drafts. The specimen must be parallel to and approximately 6 inches from the front of the chamber. The lower end of the specimen must be held rigidly clamped. The upper end of the specimen must pass over a pulley or rod and must have an appropriate weight attached to it so that the specimen is held tautly throughout the .ammability test. The test specimen span between lower clamp and upper pulley or rod must be 24 inches and must be marked 8 inches fromthelowerend toindicatethecentralpointfor.ameapplication.A .amefrom a Bunsen or Tirrill burner must be applied for 30 seconds at the test mark. The burner mustbe mounted underneath the test mark on the specimen,perpendicular to the specimen and at an angle of30degrees to the verticalplane of the specimen. The burner must have a nominal bore of three-eighths inch, and must be adjusted to provide a three-inch-high .ame with an inner cone approximately one-third of the .ameheight.Theminimumtemperatureof thehottestportionof the .ame,as measured with a calibrated thermocouplepyrometer, may notbeless than1,750'F. Theburnermustbepositioned sothatthehottestportionof the .ameisapplied to the test mark on the wire. Flame time, burn length, and .aming time of drippings,
′
Elodie Roux. Septembre 2003
AppendixF :[TestProcedure]
ifany, mustbe recorded.Theburnlengthdeterminedin accordance withparagraph (h)of this appendix must be measured to the nearest one-tenth inch. Breaking of the wire specimen is not considered a failure.
(h) Burn length. Burn length is the distance from the original edge to the farthest evidenceofdamagetothetest specimendueto .ameimpingement,including areas of partial or complete consumption, charring, or embrittlement, but not including areas sooted, stained, warped, or discolored, nor areas where material has shrunk or melted away from the heat source.]
中国航空网 www.aero.cn
航空翻译 www.aviation.cn
本文链接地址：FAA规章 美国联邦航空规章 Federal Aviation Regulations 3(15)
