1、 Comments, suggestions, or questions on this document should be addressed to U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or emailed to DAMI_STANDARDIZATIONconus.army.mil. Since contact i
2、nformation can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil. AMSC N/A FSC 2920 INCH-POUND MIL-DTL-62548C(AT) 22 September 2010 SUPERSEDING MIL-DTL-62548B(AT) 24 August 1998 DETAIL SPECIFICATION LEAD, IGNITION T
3、his specification is approved for use by the U.S. Army Tank Automotive Research, Development and Engineering Center (TARDEC), Research, Development and Engineering Command (RDECOM), Department of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOP
4、E 1.1 Scope. This specification covers an ignition lead that transmits high energy and high tension voltage from an ignition exciter to an igniter plug with energy to ignite and start a gas turbine engine (see 6.1). 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specif
5、ied in sections 3, 4, or 5 of this standard. This section does not include documents cited in other sections of this standard or recommended for additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they mus
6、t meet all specified requirements of documents cited in sections 3, 4, or 5 of this standard, whether or not they are listed. 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document cited to the ext
7、ent specified herein. Unless Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 2 otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). FEDERAL SPECIFICATIONS A-A-52557 - Fuel Oi
8、l, Diesel DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-DTL-5624 - Turbine Fuel, Aviation, Grades JP-4 and JP-5 MIL-PRF-6083 - Hydraulic Fluid, Petroleum Base, for Preservation and Operation MIL-PRF-7808 - Lubricating Oil, Aircraft Turbine Engine, Synthetic Base MIL-DTL-16884 - Fuel Oil, Naval Distillate
9、 MIL-PRF-23699 - Lubricating Oil, Aircraft Turbine Engine, Synthetic Base, NATO Code Number 0-156 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-130 - U.S. Military Property, Identification Marking of MIL-STD-461 - Control of Electromagnetic Interference Emissions and Susceptibility, Requirements for (see
10、4.2.1) MIL-STD-810 - Environmental Test Methods and Engineering Guidelines (see 4.2.1) (Unless otherwise indicated, copies of the above specifications, standards, and handbooks are available from Document Automation and Production Service, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-509
11、4 or website: https:/assist.daps.dla.mil/quicksearch/.) 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cit
12、ed in the solicitation or contract (see 6.2). DRAWINGS 12286829 - Lead, Ignition (Copies of these documents are available from DAMI_STANDARDIZATIONconus.army.mil or U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center, ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road,
13、 Warren, MI 48397-5000.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 3 2.3 Non-Government publications . The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issue
14、s of these documents are those cited in the solicitation or contract. (see 6.2). ASTM INTERNATIONAL ASTM D4814 - Standard Specification for Automotive Spark- Ignition Engine Fuel (Copies of these documents are available from American Society for Testing and Materials, P.O. Box C700, West Conshohocke
15、n, PA 19428-2959 or website: http:/www.astm.org/.) GENERAL DYNAMICS LAND SYSTEMS (GDLS) LS199000006173 - Nuclear Hardening Criteria (Copies of this document are available from or General Dynamics Land Systems, 38500 Mound Road, Sterling Heights, MI 48310-3200.) 2.4 Order of precedence. Unless other
16、wise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained.
17、 3. REQUIREMENT 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.1.1. 3.2 Design, materials and manufacturing processes. Design, materials, and manufacturing process selection shall be specified herein and in applicable referen
18、ced specifications, standards, and drawings. The lead ignition shall be fabricated and assembled in accordance with Drawing 12286829. Materials shall be uniform and free from imperfections or defects which affect their performance and serviceability. External surfaces shall be corrosion resistant. T
19、he materials shall be capable of meeting all requirements specified herein (see 4.2.3). 3.2.1 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the material meets or e
20、xceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs (see 4.2.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 4 3.2.2 Wire. The ignition lead wire shall be number 16 Ameri
21、can Wire Gage (AWG) minimum (see 4.2.3). 3.3 Operating requirements. The ignition lead shall provide the following functional, operational, and performance capabilities. 3.3.1 Nuclear control. The ignition lead shall have optimum protection against electromagnetic impulse (EMP) and transient radiati
22、on effects. There shall be at least 2 layers of copperweld shielding or an equivalent shielding material (see 4.2.4.1). 3.3.2 Insulation resistance. The ignition lead insulation resistance between conductor and the cable shield shall be a minimum of 100 megohms at 500 10 volts (V) direct current (dc
23、) (see 4.2.4.2). 3.3.3 Maximum voltage. The ignition lead insulation shall show no evidence of breakdown when subjected to 20 kilovolts (kV) root mean square (rms) voltage between the conductor and the cable shield for a 5 to 10 second duration (see 4.2.4.3). 3.3.4 Accelerated aging. The ignition le
24、ad insulation shall withstand a temperature of 392 degrees Fahrenheit (F) (200 degrees Celsius (C) for a minimum of 168 hours and continue to meet the requirements of 3.3.2 and 3.3.3 without degradation in performance (see 4.2.4.4). 3.3.5 Nuclear hardening. The ignition lead shall withstand a nuclea
25、r threat environment as defined in “Nuclear Hardening Criteria,” document control number LS199000006173 (see 4.2.4.5). 3.4 Interface requirements. The lead ignition shall accommodate the following inputs and interfaces. 3.4.1 Electromagnetic interference (EMI). The ignition lead shall meet the requi
26、rements of MIL-STD-461, or an equivalent, on a component level as part of the engine electronic control system (see 4.2.5.1). 3.5 Support and ownership requirements. The ignition lead shall meet the following logistics requirements. 3.5.1 Identification marking. The ignition lead shall be permanentl
27、y marked and identified in accordance with Drawing 12286829 and MIL-STD-130, or equivalent (see 4.2.6.1). 3.5.2 Interchangeability. The ignition lead shall be interchangeable with other parts having identical part number (see 4.2.6.2). 3.5.3 Safety. The lead ignition shall pose no hazards, physicall
28、y or electrically, to operating personnel (see 4.2.6.3). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 5 3.6 Operating environment requirements. The ignition lead shall operate under the following environmental conditions without
29、 damage of materials or degradation of performance. 3.6.1 Temperature stability. The ignition lead shall meet the requirements of 3.3.2 and 3.3.3 after exposure to a temperature range of 65 F (54 C), 77 F (25 C), and 212 F (100 C) (see 4.2.7.1 through 4.2.7.3). 3.6.2 Operational altitude range. The
30、ignition lead shall meet the requirements of 3.3.2 and 3.3.3 within a range of altitude between 13005 percent (%) feet below sea level and 10 000 2% feet above sea level (see 4.2.7.4). 3.6.3 Humidity. The ignition lead shall meet the requirements of 3.3.2 and 3.3.3 during and after being subjected t
31、o a relative humidity of 0 to 100% for a 15 day period. Upon completion, there shall be no corrosion or degradation in the strength of the lead (see 4.2.7.5). 3.6.4 Salt spray. The ignition lead shall meet the requirements of 3.3.2 and 3.3.3 after being exposed to a salt fog (5% NaC1 and 95% distill
32、ed water by weight) at 90 to 95 F (32 to 35 C) for a minimum of 48 hours (see 4.2.7.6). 3.6.5 Sand and dust. The ignition lead insulation resistance and maximum voltage performance shall not be deteriorated by exposure to sand and dust (see 4.2.7.7). 3.6.6 Fungus. The ignition lead insulation resist
33、ance and maximum voltage performance shall not be deteriorated when exposed to a fungus environment (see 4.2.7.8). 3.6.7 Chemical resistance. The ignition lead shall meet the requirements of 3.3.2 and 3.3.3 when exposed to the following materials in operating, non-operating and transit conditions (s
34、ee 4.2.7.9): a. Fuel vapors per A-A-52557, ASTM D4814, MIL-DTL-5624, and MIL-DTL-16884, or equivalents. b. Hydraulic fluid per MIL-PRF-6083, or an equivalent. c. Lubricating oil per MIL-PRF-7808 and MIL-PRF-23699, or equivalents. 3.6.8 Vibration. The ignition lead shall meet the requirements of 3.3.
35、2 and 3.3.3 after being exposed to vibration levels up to 5 gravity units (g) from 5 to 2000 to 5 hertz (Hz) for a period of 20 minutes (see 4.2.7.10). 3.6.9 Shock. 3.6.9.1 Gun firing shock. The ignition lead shall be capable of sustaining shock impulses of 10010 g intensity for a 1.50.2 millisecond
36、s (ms) duration in any direction without malfunction (see 4.2.7.11.1). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 6 3.6.9.2 Ballistic shock. The ignition lead shall be capable of sustaining impact shock waves generated by the
37、application of 20020 g half-sine wave shock pulses in any direction without malfunction (see 4.2.7.11.2). 3.6.9.3 Basic shock. The ignition lead shall be capable of sustaining half-sine wave shock pulses of 40 g intensity for a 18 ms duration in any direction without malfunction (see 4.2.7.11.3). 3.
38、6.10 Submergence. The ignition lead shall be fully operational after submergence in 6 feet (ft) of water for a period of 30 minutes (see 4.2.7.12). 4. VERIFICATION 4.1 Classification of inspection. The inspection requirements specified herein are classified as follows: a. First article inspection (s
39、ee 4.1.1). b. Conformance inspections (CI) (see 4.1.2). 4.1.1 First article inspection. First article inspection shall be performed on 3 samples of the initial production ready production-representative units of an order or when required by the contract. When first article inspection is required (se
40、e 3.1, 6.2 and 6.3), it includes all verifications listed in table I. 4.1.2 Conformance inspection. Conformance inspection shall include the examinations and tests specified in table I. 4.1.2.1 Sampling plan. The sampling plan shall be as specified in the contract or order (see 6.2). 4.1.2.2 Examina
41、tion. The samples selected in accordance with 4.1.2.1 shall be examined as specified in table I. The acceptance number in all cases is zero. 4.1.2.3 Tests (100% inspection). Each ignition lead shall be subjected to and pass the acceptance tests specified in table I. 4.2 Verification methods. Accepta
42、ble verification methods included in this section are visual inspection, measurements, sample tests, full-scale demonstration tests, simulation, modeling, engineering evaluation, component properties analysis, and similarity to previously-approved or previously-qualified designs. 4.2.1 Verification
43、alternatives. The manufacturer may propose alternative test methods, techniques, or equipment, including the application of statistical process control, tool control, or Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 7 cost effect
44、ive sampling procedures to verify performance. See the contract for alternatives that replace verification methods required by this specification (see 6.2). Table I. Verification methods. First CI Title Requirement Verification article Examination Test Design, materials and manufacturing 3.2 and 3.2
45、.2 4.2.3 X X Operating requirements 3.3 4.2.4 Nuclear control 3.3.1 4.2.4.1 X Insulation resistance 3.3.2 4.2.4.2 X X Maximum voltage 3.3.3 4.2.4.3 X X Accelerated aging 3.3.4 4.2.4.4 X Nuclear hardening 3.3.5 4.2.4.5 X Interface requirements 3.4 4.2.5 Electromagnetic interference 3.4.1 4.2.5.1 X Su
46、pport and ownership requirements 3.5 4.2.6 Identification and marking 3.5.1 4.2.6.1 X X Interchangeability 3.5.2 4.2.6.2 X X Safety 3.5.3 4.2.6.3 X X Operating environment requirements 3.6 4.2.7 High temperature 3.6.1 4.2.7.1.1 X Room temperature 3.6.1 4.2.7.1.2 X Low temperature 3.6.1 4.2.7.1.3 X O
47、perational altitude range 3.6.2 4.2.7.4 X Humidity 3.6.3 4.2.7.5 X Salt spray 3.6.4 4.2.7.6 X Sand and dust 3.6.5 4.2.7.7 X Fungus 3.6.6 4.2.7.8 X Chemical resistance 3.6.7 4.2.7.9 X Vibration 3.6.8 4.2.7.10 X Shock 3.6.9 4.2.7.11 X Gun firing shock 3.6.9.1 4.2.7.11.1 X Ballistic shock 3.6.9.2 4.2.7
48、.11.2 X Basic shock 3.6.9.3 4.2.7.11.3 X Submergence 3.6.10 4.2.7.12 X 4.2.2 Inspection conditions. Unless otherwise specified herein, all inspections shall be conducted at an atmospheric pressure of approximately 30 inches of mercury and at a temperature of 70 F to 80 F (21 C to 27 C) and a relativ
49、e humidity of 90% or less. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-62548C(AT) 8 4.2.2.1 Inspection tolerances. Unless otherwise specified herein, all inspection conditions, as indicated by instrumentation, shall not deviate from the conditions specified herein by more
