1、MIL-H-5484C 23 MARCH 1964 SUPERSEDING (SEE SECTION 6) MILITARY SPECIFICATION HEATER; AIRCRAFT, COMBUSTION TYPE This specification has been approved by the Department of Defense and is ma Shapes and Forging s-C or r o - sion Resisting QQ-2325 -Zinc Coating; Electro- deposited, Require- ments for MIL-
2、G-5572 -Preservation; Methods of -Detector Kit, Carbon Monoxide, Colormet- rie -Tube, NBS Colormet- rie Indicating, Car- bon Monoxide -Connectors ; Electrical -Jet Fuel, Referee -Environmental Test - ing; Aeronautical and Associated Equipment, General Specification for -Enamel ; Heat-Resist- ing, Gl
3、yceryl-Phthal- ate, Black Av i at i on , Grades 80187,91196, I I -Gasoline ; A.- . 100/130, 1151145 MIGJ-5624 -Jet Fuel, Grades JP-3, JP-4 and JP-5 MIL-T-5842 -Transparent A r e a s , Anti-icing, Defrost- ing and Defogging Systems, General Specifications for MIGC-6021 -Castings ; Classifica- tion an
4、d Inspection of, for Aeronautical Application MIL-1-6181 -Interference Con t 10 1 Requirements; Air- craft Equipment 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-5484C Lb 4994706 0384709 5 W MIGH-5484C MIM-6721 -Steel, Corrosion and Heat R
5、esistant (chemically stab i - lized) Plate, Sheet and Strip MIL-W-6858 -Welding ; Resistance : Aluminum, Steel or Alloys, Magnesium, Non-Hardening Nickel Alloys, Heat- Resisting Alloys and Titanium Alloys ; Spot and Seam MIL-P-6906 -P 1 at e s ; Information and Identification MILS-8879 -Screw Thread
6、s ; Con- trolled Radius Root with Increased Minor Diameter, Gen er a 1 Specifica- tion for MILP-7936 -Parts and Equipment ; Aeronautical, Prepa- ration for Delivery MIL-P-8585 -Primer Coating; Zinc Chromate, Low Moisture Sensitivity MIL-W-8611 -Welding, Metal Arc and Gas, Steels and Corrosion and He
7、at Resistant MIL-A-8625 -Anodic Coatings for Aluminum and Alu- minum Alloys MILT-9107 -Test Reports ; Prepa- ration of MILA-9482 -Anti-icing Equipment for Aircraft Heated Surface Type, Gen- e 11 a 1 Specifications for MIL-H-18325 -Heating and Ventilat- ing Systems, Air- craft, General Spec- ificatio
8、n for MIL-T-18607 -Thermal Anti-I cing Equipment, Wing and Empennage MIL-D-70327 -Drawings ; Engineer- ing and Associated Lists STANDARDS MILITARY MIGSTD-129 -Marking for Shipment and Storage MIL-STD-143 -Specifications and Standards ; Order of Precedence for the Selection of MIGSTD-704 -Character i
9、st i cs and Utilization of Air- craft Electric Power MS33586 -Metals ; Definition of Dissimilar (Copies of applicable documents required by sup- pliers in connection with specific procurement func- tions should be obtained from the procuring activity or as directed by the contracting officer.) 2.2 O
10、ther publications. The following docu- ments form a pai$ of this specification to the extent specified herein. Unless otherwise in- dicated, the issue in effect on date of invita- tion for bids OF request for proposal shall apply. DEFENSE DOCUMENTATION CENTER FOR SCIENTIFIC AND TECHNICAL INFORMA- TI
11、ON U. S. Standard Atmosphere, 1962 (Application for copies of this publication should be addressed to the Defense Documentation Center for Scientific and Technical Information (DDC), Building 5, Cameron Station, Alexandria, Va. 22314.) THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS Power Test Code-Par
12、t 2, Pressure Measurement PTC 19.2.1.6 -1941 Chapters I and 6 PTC 19.2.2.3 -1949 Chapters 2 and 3 PTC 19.2.5 -1952 Chapter 5 Power Test Code-Part 5, Measurement of Quantity of Ma- terials PTC 19.5.4 -1959 Chapter 4 (Application for copies should be addressed to the American Society of Mechanical Eng
13、ineers Publica- tions, 29 West 89th Street, New York 18, New York.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ME-H-5484C TABLE I. Heatel. yatings,
14、 sizes uzd weights Rsting BU Per IIoui. 15,000 25,000 50,000 100,000 . Further increases in in- crements of 109,000. BTU per hour. I Voluniefric Size Cubic liiciies (Max.) 700 1,000 1,000 2,000 Increases 1,000 cubic inches per each 100,000 RTU per hour additional rat.ing Envelopo Sise hiux.) To be s
15、upplied by ariframe manufacturer. 20 26 32 38 Increases 15 lb. per each 100,000 BTU per hour additional rating. Q Excludes combustion air protrusions. *“ Includes the ignition system. 3.3.1.1 Standiwd parts. Standard parts shall be used wherever they are suitable for the purpose, and shall be identi
16、fied on the drawing by their part numbers. Commercial utility parts such as screws, bolts, nuts, cot- ter pins, etc., may be used provided they possess suitable properties and are replace- able by the Standard parts without altera- tion, and provided the corresponding Stand- ard part numbers are ref
17、erenced in the parts list and if practicable on the contrac- tors drawings. In the event there is no suitable corresponding Standard part in ef- fect on date of invitation for bids, com- mercial parts may be used provided they conform to all requirements of this spec- ification, 3.3.2 Metals. All me
18、tals used in construc- tion of heaters shall be of a corrosion-re- sistant type or shall be suitably protected to resist corrosion and shall not be subject to deleterious changes on exposure to operating temperatures during the normal service life of the heater, The use of dissimilar metals, as defi
19、ned in MS33586, shall be avoided wherever practicable. Where such contacts are unavoidable they shall be properly insu- lated in the best practicable manner. 3.3.2.1 Casthgs. Castings shall be of high quality, clean, sound, and free from blow holes, porosity, cracks, and other defects. Castings shal
20、l meet the requirements spec- ified for Class 2B of Specification MIL-C- 6021. 3.3.3 Fungus-proof mntet%b. Materials which are not nutrients for fungi shall be used to the greatest extent practicable. In cases where materials that are nutrients for fungi must be used, such materials shall be treated
21、 with a fungicidal agent, as approved by the Government. 3.4 Design, The design of the heaters shall be such that combustion can be started by a spark plug or glow plug igniter with the control at a station remote from the heater. Common air inlets for combustion and ven- tilating air shall not be u
22、sed. The combus- tion chamber shall form a closed duct having no openings into the ventilating airstream. The combusion chamber and the inlet and exhaust tubes or ducts shall be so designed that they will not rupture under the most severe explosion conditions that may result from any possible fuel-a
23、ir mixture. The heater exhaust shall be provided with a leak- proof connection to permit attachment of necessary ducting to conduct exhaust gases to the exterior of the aircraft. 3.4.1 Heat exchanger. The heater shall be designed so that for any condition of opera- tion, except when positive pressur
24、e is im- posed at combustion air outlet, with OF with- out a blower, the static pressures existing in any part of the combustion chamber will be less than the static pressure in the venti- lating air chamber surrounding the combus- tion chamber. The heat and corrosion-re- sistant material used in th
25、e construction of I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-the heat exchanger and exhaust tubes shall conform to or exceed the requirements of Specification QQ-S-763, Class 321 and MIGS-6721, and shall be a type which at anytime during the n
26、ormal service life of the heater can be repaired by Overhaul and Repais Activity procedures. 3.4.2 FueE drcins. Fuel drains shall be pro- vided in the combustion chamber to eliminate the possibility of any accumulation of fuel. 3.4.3 Supply fuel pressu7-e. The heater shall operate satisfactorily wit
27、hin the fuel-pres- sure supply limits of 1 to 28 pounds per- square inch for gasoline or more for JP type fuels as specified in the procurement docu- ment (see 6.3). 3.4.4 Vibrution. The heater shall be so de- signed as to be capable of meeting the vibra- tion requirements of Procedure XII of Spec-
28、ification MIL-E-5272 without damage or improper operation. 3.4.5 EzpEosion. The heater shall be capable of withstanding the explosion resistance test outlined in paragraph 4.8.5 without rupture. 3.5 Construction. The heater shall be so constructed as to withstand the normal strains, shocks, vibratio
29、ns, and such other conditions as are incident to shipping, stoi- age, installation and service use without failure. 3.5.1 Interchmageability. All paits having the same manufacturers part number shall be directly and completely interchangeable with each other with respect to installation and performa
30、nce. Changes in manufac- turers part numbers shall be governed by , the drawing number requirements of Speci- fication MIL-D-70327. 3.5.2 Replaceability. It shall be practicable to replace any component assembly of the heater without requiring replacement of other components. 3.6 Electrical requirem
31、ents and properties. 3.6.1 Operuting voltage. The heates shall maintain the specified performance using d-c I power (category B) with characteristics l MIL-H-54844 I which are listed in Military Standard 3.6.2 Pozue Consumption. The electrical power consumption of the heater when op- erating under a
32、ny condition, except during starting, shall not exceed 75 watts. The elec- trical power required for stai.ting the heater shall not exceed 350 watts. 3.6.3 Shielding. The ignition system of the heaters shall utilize high tension shielded type wire and shall meet the radio inter- ference requirements
33、 of Specification MIL 3.6.4 Electrical connectors. Electrical con- nectors shall be in accordance with Spec- ification MIL-C-5015. 3.6.5 Electrical accessories. The part of the ignition system external to the heater or combustion or ventilation ducts must be in- capable of acting as a source of igni
34、tion for fuel, oil, or fuel and oil fumes. MIL-STD-704. 1-6181. I 3.7 Threads. 3.7.1 Stq-aight threads. All straight screm- threads shall conform to Specification MIL- S-8 87 9. 3.7.2 Pipe-threads. Pipe threads may be employed only for permanently plugging drilled or cored openings. 3.8 Finish. Prot
35、ective coatings and finishes that will crack, chip, or scale during normal service life OF due to extremes of atmos- pheric conditions shall not be used. 3.8.1 Alumiwum-ulloy parts. Aluminum- alloy parts, where practicable, shall be covered with an a.nodic-film conforming to Specification MIL-A-8625
36、, except tha.t elec- trical receptacles need not be anodized. 3.8.2 Steel parts. Steel parts except for corrosion-resisting steel shall be cadmium- or zinc-plated where practicable in accord- ance with Specification QQ-P-416 or QQ-Z- 325, respectively. 3.8.3 Exposed parts. Exposed corrosion- resista
37、nt material need not be painted. All other exposed metal surfaces shall be coated I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-H-5484C with one coat of zinc chromate primer in accordance with Specification MIGP-8585, and finished with one co
38、at of black enamel in accordance with Specification MIGE- 5557. 3.9 Operational perf ormance and product characteristics. The ignition system of the heater shall be capable of igniting the fuel- air mixture in the combustion chamber at any inlet air and fuel temperature ranging from -54“ to 38“ C (-
39、65“ to + 100“ F), except when grade JP-5 fuel is specified, and at any combination of altitude differential pressures as determined applicable for the type of aircraft in which the heaters are to be used, The minimum fuel temperature when grade JP-5 fuel is specified shall be that temperature corres
40、ponding to a fuel viscosity of not less than 12 centistokes. The time required for ignition shall not exceed 15 seconds for gasoline or 60 seconds for JP type fuels. Ignition time is defined as the time required after actuation of the ignition switch until the heater exhaust temperature rises 150“ F
41、 providing that the heater then continues to operate in a normal manner; Le., no smoking, no backfiring, etc. Heaters shall be capable of operating con- tinuously with fuel conforming to Specifica- tion MIL-G-5572, Grade 115/145, or MIL- J-5624, as applicable, for a period of not less than 200 hours
42、 without the necessity of re- moving lead compound, gum, soot, or other deposits which might interfere with the satisfactoiy operation of the heater. PPO- visions shall be made for ready removal of deposits accumulated at the end of this period unless the design of the heater is such that deposits d
43、o not seriously interfere with its operation during the complete endurance test as outlined in paragraph 4.8.6. 3.10 Product performance. The heater shall comply with the performance requirements specified in section 4 when subjected to the applicable tests therein. 3.11 Special tools. The design sh
44、all be such as to accommodate to the greatest possible extent, disassembly, reassembly, or service maintenance by those tools and items of 6 I : .-7 1 maintenance equipment which are normally available as commercial standards, 3.12 Identification of product. 3.12.1 Nameplate. The nameplate shall con
45、- form to Specification MIGP-6906, and shall be securely attached to the heater and legibly marked with the following minimum infor- mation : HEATER ; AIRCRAFT, COMBUSTION Specification MIGH-5484C Voltage Heater Rating BTU per hour Manu fact urers Part No. Manufacturers Serial No, Contract or Order
46、No. Manufacturers name OF trademark U. S. Property I TYPE 3.13 Workmanship, It is required that all details of workmanship be of the highest quality in order to insure proper functioning of the heater. Particular attention shall be given to thoroughness of assembly, align- ment of parts and tightnes
47、s of assembly screws and bolts, marking of parts, surface finishes, and removal of burrs and sharp edges. 3.13.1 Welding. Joining of component parts by fusion welding shall be accomplished in accordance with Specification MIL-W-8611. When resistance welding is used, the require- ments of Specificati
48、on MIL-W-6858 shall be adhered to. 3.13.2 Cleaning. All parts of the heater assembly shall be clean and free from dirt, metal chips and other foreign matter during and after assembly, 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless otherwise specified in the contract or pur
49、- chase order, the supplier is responsible for the performance of all inspection require- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ments as specified herein. Except as other- wise specified, the supplier may utilize his own facilities or any commercial laboratory acceptable to the Government. The Govern- ment reserves the right to perform any of the inspections set forth in the speci
