15 — 3g" -1⅓2" SPACES
FOR SPOT WELD
OVERLAP FOR LAP FOR 2/64" SPACES - 264" SPACES
DRAFT TUBE
EXTENTION FOR
FAA HOSE TEST BURNER TO DRAFT TUBE.
/ SECTION OF CONNECTING 12‡" FLANGE
BOLT HOLES MATERIAL:
0.050 STAINLESS STEEL →A‡" NOTE:
ONE HALF (1/2) OF TUBE EXTENTION SHOWN. Tź"
SECOND HALF MATES AT SPOTWELD FIGURE 3 OVERLAPS.
(25mm) 10"+1/8" 1" DIAMETER HOLE FOR [254mmt3mm] CALORIMETER MOUNTING (152x305x1 9mm) 6"x12"x ¾"
MARINITE BLOCK 6"+1/8" [152mmt3mm] 3"+1/8" [76mm +3mm] 12"+1/8" [305mm +3mm] 21½"1/8"
- [546mm t3mm]
SIDE VIEW [19mm ‡3mm] BURNER CONE 4"+1/8" (25mm) 1" DIAMETER [102mm +3mm ] 12"+1/8" - STEEL ANGLE 305mm+3mm •WATER-COOLED (25x25x3mm) 1"x1"x ¼"
CALORIMETER
RACK FITS INSIDE
SEAT FRAME
TOP VIEW CALORIMETER BRACKET FIGURE 4 691
1"‡1/8" 10"÷1/8" [25mm +3mm]
• [254mm t3mm] 1"+1/8" [25mm +3mm] 3"+1/8" ... [76mm‡3mm]
SIDE VIEW 7 THERMOCOUPLE WIRES 21¿"‡1/8" [546mm +3mm]
STEEL ANGLE BURNER CONE 4"+1/8" 1"x1"x¼" [102mm +3mm] (25x25x3mm) 1"÷1/8" [25mmt3mm] 12"+1/8" [305mm ‡3mm]
RACK FITS
INSIDE SEAT FRAME
TOP VIEW THERMALCOUPLE RAKE BRACKET FIGURE 5 1166 - 1170. [RESERVED] 692
693 1171. APPENDIX F, PART III, DID NOT EXIST PRIOR TO AMENDMENT 25-60.
1172. APPENDIX F, AMENDMENT 25-60, Effective June 16, 1986. This amendment added Part III.
PART III - TEST METHOD TO DETERMINE FLAME PENETRATION RESISTANCE OF CARGO COMPARTMENT LINERS.
(a) Criteria for Acceptance.
(1) At least three specimens of cargo compartment sidewall or ceiling liner panels must be tested.
(2) Each specimen tested must simulate the cargo compartment sidewall or ceiling liner panel, including any design features. such as joints, lamp assemblies, etc., the failure of which would affect the capability of the liner to safely contain a fire.
(3) There must be no flame penetration of any specimen within 5 minutes after application of the flame source and the peak temperature measured at 4-inches above the upper surface of the horizontal test sample must not exceed 400ºF.
(b) Summary of Method. This method provides a laboratory test procedure for measuring the capability of cargo compartment lining materials to resist flame penetration with a 2 gallon per hour (GPH) #2 Grade kerosene or equivalent burner fire source. Ceiling and sidewall liner panels may be tested individually provided a baffle is used to simulate the missing panel. Any specimen that passes the test as a ceiling liner panel may be used as a sidewall liner panel.
(c) Test Specimens.
(1) The specimen to be tested must measure 16±1/8-inches (406±3 mm) by 24±1/8-inches (610±3 mm).
(2) The specimens must be conditioned at 70±5ºF. (21±2ºC.) and 55±5% humidity for at least 24 hours before testing.
(d) Test Apparatus. The arrangement of the test apparatus, which is shown in Figure 3 of part II and Figures I through 3 of this part of Appendix F, must include the components described in this section. Minor details of the apparatus may vary, depending on the model of the burner used.
(1) Specimen Mounting Stand. The mounting stand for the test specimens consists of steel angles as shown in Figure 1.
(2) Test Burner. The burner to be used in testing must-
(i) Be a modified gun type.
(ii) Use a suitable nozzle and maintain fuel pressure to yield a 2 GPH fuel flow. For example: an 80 degree nozzle nominally rated at 2.25 GPH and operated at 85 pounds per square-inch (PSI) gage to deliver 2.03 GPH.
(iii) Have a 12-inch (305 mm) burner extension installed at the end of the draft tube with an opening 6-inches (152 mm) high and 11-inches (280 mm) wide as shown in Figure 3 of part II of this Appendix.
(iv) Have a burner fuel pressure regulator that is adjusted to deliver a nominal 2.0 GPH of #2 Grade kerosene or equivalent.
(v) Burner models which have been used successfully in testing are the Lenox Model OB- 32, Carlin Model 200 CRD and Park Model DPL. The basic burner is described in FAA Powerplant Engineering Report No. 3A, Standard Fire Test Apparatus and Procedure for Flexible Hose Assemblies, dated March 1978; however, the test settings specified in this Appendix differ in some instances from those specified in the report.
(3) Calorimeter.
(i) The calorimeter to be used in testing must be a total heat flux Foil Type Gardon Gage of an appropriate range (approximately 0 to 15.0 British thermal unit (BTU) per ft.2 sec., 0-17.0 watts/cm2). The calorimeter must be mounted in a 6 by 12-inch (152 by 305 mm) by 3/4-inch (19 mm) thick insulating block which is attached to a steel angle bracket for placement in the test stand during burner calibration as shown in Figure 2 of this part of this Appendix.
(ii) The insulating block must be monitored for deterioration and the mounting shimmed as necessary to ensure that the calorimeter face is parallel to the exit plane of the test burner cone.
(4) Thermocouples. The seven thermocouples to be used for testing must be 1/16-inch ceramic sheathed, type K, grounded thermocouples with a nominal 30 American wire gage (AWG) size conductor. The seven thermocouples must be attached to a steel angle bracket to form a thermocouple rake for placement in the test stand during burner calibration as shown in Figure 3 of this part of this Appendix.
(5) Apparatus Arrangement. The test burner must be mounted on a suitable stand to position the exit of the burner cone a distance of 8-inches from the ceiling liner panel and 2- inches from the sidewall liner panel. The burner stand should have the capability of allowing the burner to be swung away from the test specimen during warm-up periods.
(6) Instrumentation. A recording potentiometer or other suitable instrument with an appropriate range must be used to measure and record the outputs of the calorimeter and the thermocouples.
(7) Timing Device. A stopwatch or other device must be used to measure the time of flame application and the time of flame penetration, if it occurs.
(e) Preparation of Apparatus. Before calibration, all equipment must be turned on and allowed to stabilize, and the burner fuel flow must be adjusted as specified in paragraph (d)(2).
(f) Calibration. To ensure the proper thermal output of the burner the following test must be made:
(1) Remove the burner extension from the end of the draft tube. Turn on the blower portion of the burner without turning the fuel or igniters on. Measure the air velocity using a hot wire anemometer in the center of the draft tube across the face of the opening. Adjust the damper such that the air velocity is in the range of 1550 to 1800 ft./min. If tabs are being used at the exit of the draft tube, they must be removed prior to this measurement. Reinstall the draft tube extension cone.
(2) Place the calorimeter on the test stand as shown in Figure 2 at a distance of 8-inches (203 mm) from the exit of the burner cone to simulate the position of the horizontal test specimen.
(3) Turn on the burner, allow it to run for 2 minutes for warm-up, and adjust the damper to produce a calorimeter reading of 8.0±0.5 BTU per ft.2 sec. (9.1±0.6 Watts/cm2).
(4) Replace the calorimeter with the thermocouple rake (see Figure 3).
(5) Turn on the burner and ensure that each of the seven thermocouples reads 1700±100ºF.
(927± 38ºC.) to ensure steady state conditions have been achieved. If the temperature is out of this range, repeat steps 2 through 5 until proper readings are obtained.
(6) Turn off the burner and remove the thermocouple rake.
(7) Repeat (1) to ensure that the burner is in the correct range.
(g) Test Procedure.
(1) Mount a thermocouple of the same type as that used for calibration at a distance of 4- inches (102 mm) above the horizontal (ceiling) test specimen. The thermocouple should be centered over the burner cone.
(2) Mount the test specimen on the test stand shown in Figure 1 in either the horizontal or vertical position. Mount the insulating material in the other position.
(3) Position the burner so that flames will not impinge on the specimen, turn the burner on, and allow it to run for 2 minutes. Rotate the burner to apply the flame to the specimen and simultaneously start the timing device.
(4) Expose the test specimen to the flame for 5 minutes and then turn off the burner. The test may be terminated earlier if flame penetrations observed.
(5) When testing ceiling liner panels, record the peak temperature measured 4-inches above the sample.
(6) Record the time at which flame penetration occurs if applicable.
(h) Test Report. The test report must include the following:
(1) A complete description of the materials tested including type, manufacturer, thickness, and other appropriate data.
(2) Observations of the behavior of the test specimens during flame exposure such as delamination, resin ignition, smoke, etc., including the time of such occurrence.
(3) The time at which flame penetration occurs, if applicable, for each of the three specimens tested.
(4) Panel orientation (ceiling or sidewall).
HORIZONTIAL SPEC. POSION
HORIZONTIAL AND VERTICAL SPECIMENS ARE
CLAMPED IN PLACE ON ALL EDGES BETWEEN
ANGLES AS SHOWN IN VIEW A - A
TEST STAND FRAME - AL HORIZONTIAL SPEC VERTICAL SPEC. - SUPPORT ANGLE
TOP VIEW VIEW A - A (Typical) 16" VERTICAL SPEC. F POSITION
BURNER CONE
BURNER ASSE
BURNER SHIELD
SUPPORT BRACE 1"X 3" X 1/8" STEEL "U" CHANNEL
SIDE VIEW 697
C L 1" DIAMETER HOLE FOR
CALORIMETER MOUNTING
- 12 1/2"
MARINITE BLOCK 6" X 12" X 3/4" 6 1/4" 11" 25"
TOP VIEW NOTE: BRAKET IS CLAMPED TO TEST
STAND WITH CALORIMETER
CENTERED OVER BURNER CONE
WATER-COOLED
CALORIMETER 1" DIA 3/4" 8 + 1/8
STEEL ANGLE 1"X 1" X 1/8"
BURNER CONE
SIDE VIEW FIGURE 2. CALORIMETER BRACKET 698
SEVEN THERMOCOUPLE WIRES 24" 12 1/2" -
TOP VIEW
STEEL ANGLI X1 X 1/8
BURNER CONE
SIDE VIEW FIGURE 3. THERMOCOUPLE RAKE BRACKET 699
700 1173 – 1177. [RESERVED]
701 1178. APPENDIX F, PART IV, DID NOT EXIST PRIOR TO AMENDMENT 25-61.
1179. APPENDIX F, AMENDMENT 25-61, Effective August 20, 1986. This amendment added Part IV.
PART IV - TEST METHOD TO DETERMINE THE HEAT RELEASE RATE FROM CABIN MATERIALS EXPOSED TO RADIANT HEAT.
(a) Summary of Method. The specimen to be tested is injected into an environmental chamber through which a constant flow of air passes. The specimen's exposure is determined by a radiant heat source adjusted to produce the desired total heat flux on the specimen of
3.5 W/cm2 using a calibrated calorimeter. The specimen is tested so that the exposed surface is vertical. Combustion is initiated by piloted ignition. The combustion products leaving the chamber are monitored in order to calculate the release rate of heat.
(b) Apparatus. The Ohio State University (OSU) rate of heat release apparatus, as described below, is used. This is a modified version of the rate of heat release apparatus standardized by the American Society of Testing and Materials (ASTM), ASTM E-906.
(1) This apparatus is shown in Figure 1. All exterior surfaces of the apparatus, except the holding chamber, shall be insulated with 25 mm thick, low density, high temperature, fiberglass board insulation. A gasketed door through which the sample injection rod slides forms an airtight closure on the specimen hold chamber.
(2) Thermopile. The temperature difference between the air entering the environmental chamber and that leaving is monitored by a thermopile having three hot and three cold, 32 gauge Chromel-Alumel junctions. The hot Junctions are spaced across the top of the exhaust stack. Two hot junctions are located 25 mm from each side on diagonally opposite corners, and the third in the center of the chimney's cross-section 10 mm below the top of the chimney. The cold junctions are located in the pan below the lower air distribution plate (Refer to paragraph (b)(4)).
(i) Thermal Inertia Compensator. A compensator tab is made from 0.55 mm stainless steel sheet, 10 by 20 mm. An 800 mm length of 24 gauge Chromel-Alumel, glass insulated, duplex thermocouple wire is welded or silver soldered to the tab as shown in Figure 2, and the wire bent back so that it is flush against the metal surface.
(ii) The compensator tab must be mounted on the exhaust stack as shown in Figure 3 using a 6-32 round head machine screw, 12 mm long. Add small (approximately 4.5 mm O.D., 9 mm O.D.) washers between the head of the machine screw and the compensator tab to give the best response to a square wave input. (One or two washers should be adequate.) The "sharpness" of the square wave can be increased by changing the ratio of the output from the thermopile and compensator thermocouple which is fed to the recorder. The ratio is changed by adjusting the 1-K ohm variable resistor (R1) of the thermopile bleeder shown in Figure 4.
When adjusting compensation, keep R1 as small as possible. Adjustment of the compensator