1、MIL-DTL-32188 (OS) 16 September 2005 DETAIL SPECIFICATION INITIATOR, MECHANICAL ACTUATED JAU-25/A This specification is approved for use by the Naval Sea Systems Command, Department of the Navy, and is available for use by all Department and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope.
2、 The Initiator, Mechanical Actuated, JAU-25/A was designed to initiate a Shielded Mild Detonating Cord (SMDC) for initiating canopy jettison used in the F-18/TF-18 aircraft aircrew escape system. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4
3、, or 5 of this specification. This section does not include documents cited in other sections of this specification 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 must meet all
4、 specified requirements of documents cited in sections 3, 4, or 5 of this specification, 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 to the extent specifi
5、ed herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation. DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-D-21625 Design and Evaluation of Cartridges for Cartridge Actuated Devices MIL-I-8500 Interchangeability and Replaceability of Component Parts for Aerosp
6、ace Vehicles MIL-L-757 Lead Styphnate, Normal MIL-L-3055 Lead Azide MIL-P-20444 Primer, Percussion, M42 parts for and Loading, Assembling and Packing AMSC N/A FSC 1377 DISTRIBUTION STATEMENT A: Approved for public release; distribution is unlimited. INCH POUNDComments, suggestions, or questions on t
7、his document should be addressed to Commander, Indian Head Division, Naval Surface Warfare Center, Technical Information Branch (Code 4230), 101 Strauss Avenue, Indian Head, Maryland 20640-5035, or emailed to amanda.pennnavy.mil. Since contact information can change, you may want to verify the curre
8、ncy of this address information using the ASSIST Online database at http:/assist.daps.dla.mil/ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32188 2 DEPARTMENT OF DEFENSE STANDARDS MIL-STD-464 Electromagnetic Environmental Effects Requireme
9、nts For Systems (Copies of these documents are available online at http:/assist.daps.dla.mil/ or from the Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue, Philadelphia PA 19111- 5094.) 2.2.2 Other Government documents, drawings, and publications. (This section is not applicable
10、 to this document.) 2.3 Non-Government publications and drawings. The following documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of the documents are those cited in the solicitation or contract. AMERICAN SOCIETY FOR TESTING AND MATERIALS (
11、ASTM) ASTM E1742 Standard Practice for Radiographic Examination (Copies of this document are available online at http:/www.astm.org/ or from the American Society for Testing and Materials Customer Service, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959.) SOCIETY OF AUTOMOTIVE ENGINEERS (SAE
12、) SAE AS5604 Compass: Magnetic, Pilots Standby (Copies of this document are available online at http:/www.sae.org/, or from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, Pennsylvania, United States, 15096-001.) 2.4 Order of precedence. In the event of a conflict between th
13、e text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, superseded applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article sample. When more than 12 months have el
14、apsed since production of the latest accepted lot, a first article sample of 60 initiators that have met the requirements of 3.2 through 3.5 shall be required. The sample shall be tested as specified in paragraph 4.3. 3.2 Design and construction. The JAU-25/A initiator design and construction shall
15、be identical to that subjected to qualification testing and approved for service use. 3.3 Envelope and installation. The dimensions and configuration of the JAU-25/A initiator shall be as shown on NAVAIR drawing 850AS130. All parts having the same vendors item number shall be functionally and dimens
16、ionally interchangeable in accordance with MIL-I-8500. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32188 3 3.4 Explosive train assembly. The explosive train assembly shall consist of the following: OEA P/N 2912103-1: M42C1-979 (PA101) per
17、cussion primer, lead styphnate per MIL-L-757, lead azide per MIL-L-3055 and hexanitrostilbene (HNS) type II, grade “A” per NAVAIR drawing 850AS130. SCOT P/N 6028110-01: M42C1-979 (PA101) percussion primer, lead azide per MIL-I-3055 and HNS type II grade “A” per NAVAIR drawing 850AS130. Only one lot
18、of explosive shall be used for each explosive train assembly lot manufactured. Only one lot of explosive train assemblies shall be used for each lot of initiators. 3.4.1 Percussion primer. The M42C1-979 (PA101) percussion primer used in the explosive train assembly shall be manufactured and tested i
19、n accordance with MIL-P-20444 (primer, percussion - parts for and loading - assembling and packing). The primers shall be loaded into the explosive train assembly within 24 months of new primer acceptance testing or 12 months of primer recertification testing. 3.5 Inspection 3.5.1 Explosive train as
20、sembly inspection 3.5.1.1 Visual inspection. All explosive train assemblies manufactured under contract shall be visually inspected and screened for defects as outlined in 4.4. 3.5.1.2 Leakage. Explosive train assemblies shall not exhibit a leak rate in excess of 1 105cubic centimeters per second of
21、 air when tested in accordance with 4.5. 3.5.1.3 Radiographic inspection. Explosive train assemblies shall be free of imperfections when examined radiographically in accordance with 4.7. 3.5.1.4 Gap test. Prior to assembly of initiators, each lot of explosive train assemblies shall be subjected to a
22、mbient temperature testing at a distance four times the maximum production gap in accordance with 4.6 3.5.2 Initiator inspection 3.5.2.1 Visual inspection. All initiators manufactured under contract shall be visually inspected and screened for defects as outlined in 4.4. 3.5.2.2 Radiographic Inspect
23、ion. Initiators shall be free of imperfections in assembly when examined radiographically in accordance with 4.7. 3.5.2.3 Demagnetization. Initiators shall not deflect an approved pilots standby compass more than three degrees in either direction when passed in front of the compass. The initiators s
24、hall be tested in accordance with 4.8. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32188 4 3.5.2.4 Electrical bonding resistance. Initiators shall not exhibit an electrical bonding resistance in excess of 0.0025 ohm when tested in accorda
25、nce with 4.9. 3.6 Ballistic requirements. Initiators from each first article and production lot shall meet the requirements listed below when subjected to the test prescribed in 4.11. 3.6.1 Actuation force. The upper (u) and lower (l) limits for actuation force shall be u = 35 pounds and l = 15 poun
26、ds, respectively. See 4.11.1.1. 3.6.2 High order detonation. The minimum plate dent for high order detonation of the output SMDC test tip on the witness plate shall be 0.001 inch. See 4.11.1.2. 3.6.3 Misfire. There shall be no misfires. See 4.11.1.3. 4. VERIFICATION 4.1 Classification of inspections
27、. a. First article inspection (see 4.3) b. Lot acceptance inspection (see 4.4 through 4.11) 4.1.1 Responsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of the inspection requirements as specified herein. Except as
28、 otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the government. The government reserves the right to perform any of the inspections set forth in thi
29、s document where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 Sampling. Samples for ballistic test shall be selected from the production lot in accordance with Table I. Reduced sample size is recommended after 10 consecutive acceptable
30、 lots. Sample plan to be used will be normal unless otherwise specified in the contract. Three additional initiators shall be provided with each test sample for investigative purposes. Sample initiators and initiators made available for investigative purposes shall not be applied as part of the quan
31、tity specified for delivery by the contract or order. The production lot size shall be 500 maximum initiators. Table I. Sample sizes for ballistic test. Lot Size Normal Sample Size Reduced Sample Size 2-8 2 2 9-15 3 2 16-25 5 3 26-50 8 5 51-90 13 5 91-150 20 8 151-280 32 13 281-500 50 20 Provided by
32、 IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32188 5 4.3 First article sample. Before entering into quantity production, an acceptable first article sample of 60 initiators shall be prepared using the same procedure and methods proposed for the produ
33、ction lot. Fifty-four of these initiators shall be expended in the tests listed herein and six shall be retained for investigative purposes. A first article sample acceptable for functional and environmental testing shall be defined as a sample which has met the requirements of paragraphs 3.2 throug
34、h 3.5 of this specification. The contractor shall deliver the initiators to the activity designated by the contracting agency for tests. First article sample inspection shall consist of the following tests: temperature and humidity cycling (18), vibration (6), shock (6), 65 F 5 F(12), and 200 F 5 F
35、(12). The numbers in parentheses denote the number of initiators allotted for each test. All tests are done as prescribed in MIL-D-21625 except vibration which is prescribed in 4.9 herein. The initiators shall be fired as described in 4.9 and shall meet the functional requirements referenced in 3.6.
36、 Any quantity production prior to notification by the contracting agency of first article sample acceptability shall be at the contractors risk. The first article initiators will not be applied as part of the quantity specified for delivery by the contract. 4.4 Initiator and explosive train assembly
37、 visual inspection. Visually examine all explosive train assemblies prior to initiator assembly and assembled initiators. Reject those with inadequate or illegible descriptive marking or serial numbers, dents, deep scratches, or other defects which may prevent proper assembly installation or functio
38、n. 4.5 Explosive train assembly leak test. Each explosive train assembly produced under contract shall be leak tested in a dry gas leak tester to determine conformance to 3.5.1.2. Units which exhibit a leak rate in excess of 1 x 10-5std cc/sec of air at a pressure differential of 1.0 0.1 atmosphere
39、shall be rejected. 4.6 Gap test. Each lot of explosive train assemblies shall be sampled for gap testing as follows. For lots up to 50 test 2 each, for lot sizes of 51 to 90 test 4 each and for lot sizes larger than 91 test 6 each. 4.7 Radiographic inspection. The explosive train assemblies and init
40、iators shall be arranged on trays or boards in consecutive numerical order, and each radiograph shall carry a permanent identification of the explosive train assemblies and initiators displayed thereon. The explosive train assemblies and initiators shall be positioned to give the most revealing cros
41、s-section of the explosive train assembly and initiator. All explosive train assemblies and initiators shall be identified with serial numbers prior to radiographic inspection. The radiographic identification shall include the complete lot number for the explosive train assembly and initiator and th
42、e span of serial numbers displayed. Discontinuities in serial numbers shall be identified on the radiographic plate. Defective explosive train assemblies and initiators found by the vendor shall be clearly identified on the radiographic plate and shall be removed from the production lot. Radiographs
43、 or copies of the entire production lot shall accompany the ballistic sample to the activity conducting the production lot acceptance test. (see 5.1.) 4.7.1 N-ray inspection. Each explosive train assembly shall be n-rayed prior to initiator assembly to confirm the presence of the propellant non-meta
44、l parts, no foreign hydrogenous materials and the proper assembly of pyrotechnic/non-metallic materials. Any observable imperfections in assembly shall be cause for rejection. 4.7.2 X-ray inspection. Each explosive train assembly prior to initiator assembly and assembled initiator shall be x-rayed i
45、n accordance with ASTM E1742, to confirm the presence and proper assembly of all parts any observable imperfections in assembly shall be cause for rejection. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32188 6 4.8 Demagnetization. Each in
46、itiator (without the shipping bolt installed) shall be moved past a pilots standby compass face (per SAE AS5604) by placing the initiator six inches from the compass face, in a north-south horizontal position with the compass set in an east-west heading. The initiator and the compass shall be placed
47、 at the same height from the floor. The initiators shall be moved past the compass face in a longitudinal direction for its entire length, rotated 90 degrees in the horizontal position about its longitudinal axis, and moved back past the compass face, this procedure shall be repeated for each 90 deg
48、rees rotation of the initiator. The initiators shall be acceptable if the requirements of 3.5.2.3 are met. 4.9 Electrical bonding. Each initiator shall be tested using a four point probe milliohmmeter in accordance with MIL-STD-464. The electrical bonding resistance shall be between the .375-24 SMDC
49、 port threads and the .875-14 threads on the initiator body. The initiator shall be acceptable if the requirements of 3.5.2.4 are met. 4.10 Vibration test. The initiators shall be mounted in the vibration test fixture NAVAIR drawing 850AS844 and set up shown in figure 1 below. Six initiators shall be mounted on the test fixture at the same time and one shall be monitored for response during the test. Figure 1. Vibration test fi
