Furthermore, if the optional three-hole upper burner is used, at least two flamelets must remain lighted for the entire duration of the test, except that there may be intermittent flame extinguishment of all three flamelets for periods that do not exceed 3 seconds. 1/16- to 14 CFR 25, Appendix F, Part I (vertical test) 14 CFR 25 Vertical test- Brief. … (2) Test Burner. tube adjusted to give a flame of 1 The specimen must be retained in the hold chamber for 60 seconds, plus or minus 10 seconds, before injection. “Thermal/acoustic insulation” means a material or system of materials used to provide thermal and/or acoustic protection. (h) Each receptacle used for the disposal of flammable waste material must be fully enclosed, constructed of at least fire resistant materials, and must contain fires likely to occur in it under normal use. Each seat cushion must meet the following criteria: (1) At least three sets of seat bottom and seat back cushion specimens must be tested. An air velocity meter other than the HH30 unit can be used, provided the calculated airflow of 80.80 ft and 55%±5% humidity for at least 24 hours before testing. 2-sec (0-22.7 W/cm Mount the radiant heat energy source in a cast iron frame or equivalent. (Note: The Omega HH30 air velocity meter measures 2.625 inches in diameter. (11.9 ±0.6 w/cm The front, back, and right portions of the top flange of the frame must rest on the top of the sliding platform, and the bottom flanges must pinch all 4 sides of the test specimen. A minimum of three specimens must be tested and the results averaged. (8) Pilot-Flame Positions. The temperature difference between the air entering the environmental chamber and that leaving must be monitored by a thermopile having five hot, and five cold, 24-guage Chromel-Alumel junctions. 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. The cold junctions must be located in the pan below the lower air distribution plate (see paragraph (b)(4) of this part IV). The heat flux calibration method must be in accordance with paragraph VI(b)(7) of this appendix. Appendix J to Part 23 — HIRF Environments and Equipment HIRF Test Levels 1. 1/8 inch ± Allow it to warm up for a period of 2 minutes. The combustion products leaving the chamber are monitored in order to calculate the release rate of heat. The test report must include the following for each specimen tested: (2) Radiant heat flux to the specimen, expressed in W/cm The minimum flame temperature measured by a calibrated thermocouple pyrometer in the center of the flame must be 1550 °F. Sec. Ensure that the horizontal centerline of the burner cone is also offset 1 inch below the horizontal centerline of the thermocouple tips. (ii) Calorimeter. (iii) Place the test specimen horizontally on the non-combustible board(s). Reinstall the draft tube extension cone. Attach the blanket test specimens to the test frame using 12 steel spring type clamps as shown in figure 7. 3/4-inch (19 mm) thick calcium silicate insulating board which is attached to a steel angle bracket for placement in the test stand during burner calibration, as shown in Figure 4. Use a suitable adapter to attach the measuring device to the inlet side of the burner to prevent air from entering the burner other than through the measuring device, which would produce erroneously low readings. An operating fuel pressure of 100 lb/in (1) For each test, one set of cushion specimens representing a seat bottom and seat back cushion must be used. (5) The peak heat release and the 2-minute integrated heat release rate must be reported. This burner may be used in lieu of the standard three-hole burner described in paragraph (b)(8)(ii) of this part IV. Install a 12 + 0.125-inch (305 ±3 mm) burner extension cone at the end of the draft tube. (1) Specimen Mounting Stand. (d) Specimen conditioning. The specimen mounting frame stringers (horizontal) should be bolted to the test frame formers (vertical) such that the expansion of the stringers will not cause the entire structure to warp. 1/8 inch (3.2 mm) flat stock steel and have an opening that accommodates a Ceiling and sidewall liner panels of Class C compartments must meet the test requirements of Part III of Appendix F of this part or other approved … The specimen must be mounted in a metal frame so that all four edges are held securely and the exposed area of the specimen is at least 8 inches by 8 inches during the 45° test prescribed in subparagraph (6) of this paragraph. 1/16 inch ceramic sheathed, type K, grounded thermocouples with a nominal 30 American wire gage (AWG) size conductor. Flame time, burn length, and flaming time of drippings, if any, may be recorded. This rulemaking is issued under the authority described in Subtitle VII, Part A, Subpart III, Section 44701, “General Requirements.” Under that section, the FAA … Minor details of the apparatus may vary, depending on the model of the burner used. Adjust the air intake velocity to a level of 2150 ft/min, (10.92 m/s) then turn off the blower/motor. (1) The calibration factor is calculated as follows: (2) Heat release rates may be calculated from the reading of the thermopile output voltage at any instant of time as: (3) The integral of the heat release rate is the total heat release as a function of time and is calculated by multiplying the rate by the data sampling frequency in minutes and summing the time from zero to two minutes. “Radiant heat source” means an electric or air propane panel. 1/8-inch metal sheathed, ceramic packed, type K, grounded thermocouples with a nominal 22 to 30 American wire gage (AWG)-size conductor. (D) The method of transfer must be a heated graphite plate. Calculate the average heat flux over this 30-second duration. (8) Timing Device. (b) Summary of Method. 3/min. When the gas/air ratio and the flow rate are properly adjusted, approximately .25 inch (6 mm) of the flame length appears yellow in color. Immediately swing the burner away from the test position. 1/8 inches (102 ±3 mm) from one side of the specimen mounting stand. A mixture of 120 cm (ii) For rigid and other non-conforming types of insulation materials, the finished test specimens must fit into the test rig in such a manner as to replicate the actual in-service installation. pipe with two pressure measuring points, located 1.5 inches (38 mm) upstream and .75 inches (19 mm) downstream of the orifice plate. Immediately prior to recording methane flow rates, a flow rate of 8 liters/min. The arrangement of the test apparatus is shown in Figures 1 through 5 and must include the components described in this section. With the sliding platform pulled out of the chamber, install the calorimeter holding frame and place a sheet of non-combustible material in the bottom of the sliding platform adjacent to the holding frame. The specimen of wire or cable (including insulation) must be placed at an angle of 60° with the horizontal in the cabinet specified in subparagraph (3) of this paragraph with the cabinet door open during the test, or must be placed within a chamber approximately 2 feet high by 1 foot by 1 foot, open at the top and at one vertical side (front), and which allows sufficient flow of air for complete combustion, but which is free from drafts. (F) The entire face of the calorimeter must be lightly coated with “Black Velvet” paint having an emissivity of 96 or greater. The seven thermocouples to be used for testing must be 3/min (2.29 m part 25, appendix F, part II, section (a)(3), dress covers may be qualified by similarity. Use a flexible duct, measuring 4 inches wide (102 mm) by 20 feet long (6.1 meters), to supply fresh air to the burner intake to prevent damage to the air velocity meter from ingested soot. (6) Instrumentation. Guidance Material • 14 CFR 25.562 • 14 CFR 25.853 • 14 CFR Part 25 Appendix F Part I and Part II • Aircraft Materials Fire Test Handbook DOT/FAA/AR-00/12 (b) Acceptance Criteria. For propeller-driven airplanes with a measured flyover noise level obtained in accordance with the measurement procedures prescribed in Appendix F of 14 CFR part 36 without the performance correction defined in Sec. The thermocouples must have a .050 ±.010 inch (1.3 ±.3mm) diameter, ball-type, welded tip. F35.201(c), the limit is 69 dB for airplanes having a seating configuration of two or fewer passenger seats, … (5) To begin the test, swing the burner into the test position and simultaneously start the timing device. The fuel supplied to the burner must be methane mixed with air in a ratio of approximately 50/50 by volume. The burn length must not exceed 17 inches. Appendix E to Part 25 Title 14 - Aeronautics and Space. (6) Expose the seat bottom cushion specimen to the burner flame for 2 minutes and then turn off the burner. (Note: For blanket materials that cannot be installed in accordance with figure 7 above, the blankets must be installed in a manner approved by the FAA.). Flame characteristics are highly dependent on actual burner setup. (2) Flux Uniformity. The percentage weight loss for a specimen set is the weight of the specimen set before testing less the weight of the specimen set after testing expressed as the percentage of the weight before testing. The calorimeter must be a one-inch cylindrical water-cooled, total heat flux density, foil type Gardon Gage that has a range of 0 to 5 BTU/ft 1/8 inches (102 ±3 mm) from the exit of the burner cone. For each compartment occupied by the crew or passengers, the following apply: (a) Materials (including finishes or decorative surfaces applied to the materials) must meet the applicable test criteria prescribed in part I of appendix F of this part, or other approved equivalent methods, … (2) Each of the two insulation blanket test specimens must not allow more than 2.0 Btu/ft The burner must be mounted underneath the test mark on the specimen, perpendicular to the specimen and at an angle of 30° to the vertical plane of the specimen. (1) This apparatus is shown in Figures 1A and 1B of this part IV. The specimen must be positioned so that the edge being tested is centered The gas flow to the burner must be increased to the higher preset flow and allowed to burn for 2.0 minutes, and the thermopile voltage must be measured. The test burner must be a modified gun-type such as the Park Model DPL 3400. 2 (0.71 MPa) delivers a proper spray pattern. Such panels must be subjected to the 45 degree angle test. (4) Turn on the burner and ensure that the thermocouples are reading 1900 ±100 °F (1038 ±38 °C) to ensure steady state conditions have been achieved. The flame must be applied for 30 seconds with one-third contacting the material at the center of the specimen and then removed. Turn off burner, rotate out of position, and allow to cool. The flame must be applied to the center line of the lower edge of the specimen. Information Security Program B. For each compartment occupied by the crew or passengers, the following apply: (a) Materials (including finishes or decorative surfaces applied to the materials) must meet the applicable test criteria prescribed in part I of appendix F of this part, or other approved equivalent methods, regardless of the passenger capacity of the airplane. Drippings from the test specimen may not continue to flame for more than an average of 3 seconds after falling. The propane flow must be adjusted via gas pressure through an in-line regulator to produce a blue inner cone length of 2 (0.71 MPa) for a nominally rated 6.0 gal/hr 80° spray angle nozzle (such as a PL type) delivers 6.0 ±0.2 gal/hr (0.378 ±0.0126 L/min). (ii) Floor covering, textiles (including draperies and upholstery), seat cushions, padding, decorative and non-decorative coated fabrics, leather, trays and galley furnishings, electrical conduit, air ducting, joint and edge covering, liners of Class B and E cargo or baggage compartments, floor panels of Class B, C, E, or F cargo or baggage compartments, cargo covers and transparencies, molded and thermoformed parts, air ducting joints, and trim strips (decorative and chafing), that are constructed of materials not covered in paragraph (a)(1)(iv) below, must be self-extinguishing when tested vertically in accordance with the applicable portions of part I of this appendix or other approved equivalent means. The mounting bracket must be attached to the injection rod by three screws that pass through a wide-area washer welded onto a The fuel flow rate must be 6.0 ±0.2 gallons per hour (0.378 ±0.0126 L/min). (d) For the purposes of this section, the following definitions apply: An optional airbox permanently mounted to the burner intake area can effectively house the air velocity meter and provide a mounting port for the flexible intake duct. See figure 7. 2 sec (18.2 ±0.9 W/cm The exposed surface when installed in the aircraft must be face down for the test. CFR ; prev | next ... must meet the test requirements of part II of appendix F of this part, or other equivalent methods, regardless of the passenger capacity of the airplane. See figures 3a and 3b. If smoking is allowed in any area occupied by the crew or passengers, an adequate number of self-contained, removable ashtrays must be provided in designated smoking sections for all seated occupants. Optional Fourteen-Hole Upper Pilot Burner. (ii) A cargo or baggage compartment defined in § 25.857 as Class B or E must have a liner constructed of materials that meet the requirements of paragraph (a)(1)(ii) of part I of this appendix and separated from the airplane structure (except for attachments). These items need to comply with 14 CFR 25.853 (a) Appendix F Part I (a)(I)(ii) per the installed configuration, i.e., composite panels. (2) Ensure that the vertical plane of the burner cone is at a distance of 4 ±0.125 inch (102 ±3 mm) from the outer surface of the horizontal stringers of the test specimen frame, and that the burner and test frame are both situated at a 30° angle with respect to vertical. Condition the specimens at 70° ±5 °F (21° ±2 °C) and 55% ±10% relative humidity for a minimum of 24 hours prior to testing. Turn on the blower portion of the burner without turning the fuel or igniters on. 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