1、s -S-S-/$ MIL-C-27556A (USAF) $2 February 1970 Superseding MIL- C- 27 556 (USAF) 3 April 1962 MILITARY SPECIFIC AT ION CApTRIDGE .a KIT, PARACHUTE EJECTION MLU-l4/B AND CmmIDGE KIT, PARACHUTE EJECTION MLU-15/B 1. SCOPE 1.1 Scope. This specification covers the requirements for two similar cart- ridge
2、 kits, designated as the MLU-l4/B (0.00 second delay) and MLU-lS/B (0.75 second delay) respectively, hereafter referred to as the Kit. These cartridge kits are intended to be mea in ejecting the parachute for retardation of the BDU-lZ/B Practice Bomb. -=- 2. APPLICABLE DOCXTbEWS 2.1 The following do
3、cuments of the issue in effect on date of invitation for bids or requests for proposal, form a part of this specification to the extent specified herein. SPECIFIMTIONS Military MIL-C-25918 MIL- P- 116 STANDARDS Fed er al FED-SID-102 Military MIL-STD-105 MIL-STD-129 MIL- STD- 130 MIL-STD-143 MIL- STD
4、- 11 6 7 mL-STD-1168 Cartridge Actuated Devices, Aircraft Crew Emergency Escape, General S E ecification for Preservation, Met ods of Preservation, Packaging and Packing Levels Sampling Procedures and Tables for Inspection by Attributes Marking for Shipment and Storage Identification Marking of U.S.
5、 Military Property Specifications and Standards, Order of Precedence for the Selection of Ammunition Data Card Lot Numbering of Ammunition Licensed by Information Handling ServicesMIL-C-27556A (USAF) MILITARY STANDARD DRAWINGS IS28741 Hose Assembly, Detachable End Fitting, Medium Pressure DRAWINGS A
6、ir Force 6 1114986 Cartridge Kit, Parachute Ejection ML,-l4/B (0.00 second delay). 61D14987 Cartridge Kit, Parachute Ejection ML-l5/B (0.75 second delay). Army Munitions Command 10 5 2 2490 10522498 10522503 Gas Generator XM17 Initiator, Cartridge Actuated, XM64 Assembly Initiator, Cartridge Actuate
7、d, Delay, XM86 (with XM169 Cartridge). (Copies of specification, standards, drawings and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 Preproduction.
8、This specification makes provisions for preproduction testing . 3.2 Selection of specifications and standards. Specifications and standards for necessary commodities and services not specified herein shall be selected in accordance with MIL-STD-143. 3.3 Materials. Material shall be selected and proc
9、essed for the various parts in accordance with applicable specifications and standards as indicated on the drawings. 2 Licensed by Information Handling ServicesMIL-C-2755bA 13 = 9777906 0305101 2 = 3.3.1 Commercial parts. Commercial parts having suitable properties may be used where, on the date of
10、invitation for bids, a suitable standard part (MS or AN) is not available from any of the suppliers who stock MS and AN parts. this case, the comercial part must be replaceable by the standard part (MS or AN) without alteration, and the corresporlding standard part number must be referenced in the p
11、arts list. In 3.3.2 Use of parts. Except for the use authorized in 3.3.1, AN and MS standard parts shall be used where they suit the purpose. the drawings by their part numbers. They shall be identified on 3 . 4 Components 3.4.1 MLU-14/B (0.00 second delay). The Cartridge Kit, Parachute Ejection ML,
12、U-l4/B shall consist of the following major components or equal: N omencl at ur e Drawinp No. Quant it y a. Initiator, Cartridge Actuated, Army Ordnance 1 b. Gas Generator XM17 Army Ordnance 1 Delay, XM86 (with XMl69 Corp 10522503 Cartridge) (with M37 Cartridge) Corp 10522490 3.4.2 MLU-l5/B (0.75 se
13、cond delay). The Cartridge Kit, Parachute Ejection, MLU-lS/B shall consist of the following major components or equal: Nomenclature Drawing No. Quant it y a. Initiator, Cartridge Actuated, Army Ordnance 1 b. Gas Generator XMl7 Army Ordnance 1 XM64, Assembly (M48 Cartridge) Corp 10522498 (with M37 Ca
14、rtridge) Corp 10522490 3.5 Design and construction 3.5.1 tILU-l4/B. The Cartridge Kit, Parachute Ejection MLU-14IB shall be designed and constructed in conformance with drawing number 61D14986 and subsidiary drawings. 3.5.2 MLU-l5/B. The Cartridge Kit, Parachute Ejection MLU-l5/B shall be designed a
15、nd constructed in accordance with drawing number 61D14987 and subsidiary drawings. 3.5.3 Torque requirements. The principal components of the kit shall be so constructed that when assembled with set screws installed, the cap-initiator and head-generator body joints will withstand a torque of- 400 in
16、ch-pounds wit hou t separat ion. 3 I- . _. Licensed by Information Handling Services3.5.4 Residual magnetism, The initiator and generator shall be satisfactorily demagnetized so as to remove any residual magnetism as a result of manufacturing or inspection processes. standby compass, type AN-5766 or
17、 equivalent, more than three (3) degrees when placed six (6) inches from the face of the compass. Each assembled device shall not deflect a pilots 3.5.5 Safety provision, pins for use during shipping, storage, handling and maintenance. With the ground safety pin installed, the firing pin shall not w
18、ithdraw past the safety pin when subjected to a force of 220 pounds applied along its longitudinal axis. Each initiator shall be provided with ground safety 3.6 Functional requirements 3.6.1 Cocking force. The minimum force required to cock the firing mechanism of either initiator shall be 15 pounds
19、. be required to cock the initiators. Not more than 30 pounds of force shall 3.6.2 Ejection method. transmitted through the connecting tube to the firing mechanism of the generator. The cartridge in the generator shall provide sufficient energy to meet the ballistic requirements of this specificatio
20、n. 3.6.3 Ballistic requirements. The M37 Cartridge shall generate sufficient pressure in the XMl7 generator to shear a 7,200 pound shear joint within 0.15 seconds after initiation of the cartridge and to meet the requirements of 4.7.8.2.1.b. Gas pressure generated by the initiator shall be 3.7 Envir
21、onmental requirements. The Kit shall be capable of meeting all functional requirements when stabilized at any temperature between minus 65F and plus 160F. 3.8 Identification of product. The Cartridge Kit, major components, parts and assemblies shall be marked for identification in accordance with MI
22、L-STD-130. 3.8.1 Lot numbering, shall be assigned an ammunition lot number.in accordance with MIL-STD-1168. This lot number shall be marked on each item in addition to identification specified in MIL-STD-130. Each separate production lot of each explosive component 3.9 Ammunition data card. uted and
23、 maintained in accordance with MIL-STD-1167. Ammunition data cards shall be initiated, distrib- 3.10 Government furnished property. When specified in the contract, the Government will furnish the following to the contractor, upon his request, for use in making the IILU-l4/B and MLU-lS/B Cartridge Ki
24、t: 4 Licensed by Information Handling ServicesMIL-C-2755bA 23 77777Ob 0305103 b MIL-C- 27 556A (USAF) ITEM NO STOCK NO PART NO ITEM DESCRIPTION 1 1377-540-4813 8593745 Cartridge, M 37 QUANTITY 3 2 1377-050-5973 10522709 Cartridge, Delay, XM148 $ 3 1377-050-5974 10522707 Cartridge, Impulse, Mi.69 2:
25、*Quantities supplied shall be sufficient to meet the production and test requirements. 3.11 Workmanship. The KLt, including all parts and accessories, shall be fabricated in a manner that will insure that the criteria of appearance, fit and adherence to specified tolerances are observed. Particular
26、attention shall be given to neatness and accuracy of markings of parts and assemblies. All components shall be free from cracks, splits, cold-shuts, and inclusions. There shall be no burrs, or sharp edges which might mar adjacent equipment or injure personnel. 4. QUALITY ASSURANCE PROVISIONS 4.1 Res
27、ponsibility for inspection. Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. the supplier may utilize his own facilities or any commercial laboratory accept- able to the Government. the i
28、nspections set forth in the specification where such inspections are deemed necessary to assure supplies conform to prescribed requirements. Except as otherwise specified, The Goverment reserves the right to perform any of 4.2 Classification of tests. as follows: The inspection and testing of the Ki
29、t shall be a. Preproduction Tests (see 6.4a) b. Acceptance Tests (see 6.4b) 4.3 Preproduction testing 4.3.1 Preproduction test samples. The preproduction test articles shall be representative of production Kits. the procuring agency in the contract. Location of testing shall be designated by 4.3.1.1
30、 aeproduction sample size. preproduction testing shall be designated in the contract - see 6.2.1. The quantity of items to be used for 4.3.2 Preproduction tests. Preproduction tests shall consist of all tests described herein under 4.7 “TEST METHODS .“ 4.4 Acceptance tests. Acceptance tests shall co
31、nsist of: a. Individual Tests b. Sampling Tests 5 Licensed by Information Handling ServicesNIL-C-275CbA 13 4799906 0305304 - - _ MIL-C-27556A (USAF) 4.4.1 Individual tests, Each Kit shall be subjected to the following individual tests: a. Examination of Product (4.7.1) b. Conformance to Drawings (4.
32、7.2) C. Residual Magnetism Test (4.7.3) 4.4.2 Sampling tests. following: Sampling tests of the Kit shall consist of the a. Safety Pin Resistance Test (4,7.5) b. Ballistic Tests (4.7.8) 4.4.2,l Sample size. be made in conformance to MIL-STD-105, Inspection level II. is zero, rejection number is one (
33、1). Lot sample size for the Safety Pin Resistance Test shall Acceptance number 4.4.2.2 Ballistic test sample. Test sample sizes for the Ballistic Test shall be in accordance with following table, with the next two lots after a rejected lot being handled as first production lots: FIRST PRODUCTION LOT
34、 Production Lot Size Sample Size 4.4.2.3 Rejection and retest. specified tests, no items still-on hand or later produced shall be accepted until the extent and cause of failure are determined. When the sample item fails to meet the 4.4.3 Individual tests may continue. For operational reasons, indivi
35、dual tests may be continued pending the investigation of a sampling test failure, but final acceptance of items on hand or produced later shall not be made until it is determined that items meet all the requirements of this specification. 4.4.4 Defects in items already accepted. The investigation of
36、 a test failure could indicate that defects may exist in accepted items. shall fully advise the procuring activity of all defects likely to be found and methods of correcting them. If so, the contractor 4.5 initiators, or cartridges shall be performed behind suitable barricades or in proper inclosur
37、es. Safety, Tests involving firing or possible inadvertent firing of kits, 4.6 Packing, packaging and markis. packing and packaging of the cartridge kits and their markings conform to The inspection shall ascertain that the Section 5 of this specification. 6 Licensed by Information Handling Services
38、NIL-C-2755bA 13 a 977790b 0305105 T m i MIL- C- 275568 (USAF) 4.7 Test methods 4.7.1 examination and inspection to determine compliance with the requirements of this specification, including workmanship. of this Specification shall be cause for rejection. Examination of product. Each component shall
39、 be given a complete visual Failure to satisfy the requirements 4.7.2 Conformance to drawings. conformance to the engineering drawings, and to all specifications and Each component shall be inspected for strict standards referenced therein.- Failure to meet the above criteria shall be cause for reje
40、ction. 4.7.3 Residual magnetism test. for residual magnetism in accordance with MIL-C-25918. demagnetization requirements of MIL-(2-25918 shall be cause for rejection. The Kit, completely assembled, shall be tested Failure to meet the 4.7.4 Break-away torque test. The Kit, completely assembled, incl
41、uding all set screws, but without explosive components, shall be secured in a fixture so as to preclude damage or deformation of parts or false torque. A torque wrench set at 400 inch-pounds shall be applied to the head-body and cap- body joints. Any movement within the joint or breaking of joint me
42、mbers shall be cause or rejection. 4.7.5 Safety pin resistance test. mechanism less explosive components, with the safety pin inserted, apply a load of 220 pounds once in each direction along the longitudinal axis of the firing pin. pin from the “safe“ position shall be cause for rejection. This tes
43、t shall be performed on the firing Failure of the safety pin to prevent movement of the firing 4.7.6 Cocking force test. the firing mechanism, less explosive components, the force required to manually move the firing pin into the “cocked“ positioq shall be measured. A measured force of less than 15
44、pounds or more than 30 pounds, or failure of the mechanism to remain in the “cocked“ position shall be cause for rejection. with a suitable scale attached to the IOOP of 4.7.7 initiator energy test. one conditioned at -65OF, and one conditioned at 160F, shall be tested separately in the following ma
45、nner: Two XM86 or XM64 initiators, as applicable, a. b. c. Connect the initiator to a 15 foot length of aircraft hose conforming to MS28741, size 4. Connect a suitable gauge to opposite end of hose. Fire the initiator and measure the generated pressure at the gauge. A measured pressure of less than
46、500 psi shall be cause for rejection of the lot of initiators. 4.7.8 Ballistic test 7 Licensed by Information Handling Services4.7.8.1 Test Set-up. in an approved test fixture. joint and an 80 pound weight, positioned 50 permit unrestricted horizontal movement. For Ballistic Testing, the system shal
47、l be mounted This fixtur.? shall include a 7,200 pound shear Instrumentation shall be provided to measure shear time and velocity. 4.7.8.2 Test procedure. stabilized to temperatures shown below and fired: The sample lot shall be divided into three groups, Group 1 Group 2 Group 3 -65OF to -70F 65F to
48、 75F 160F to 165*F 4.7.8.2.1 Test criteria a. Allowable time from initiation of cartridge in initiator to breaking of 7,200 pound shear joint: (i) MLU-14IB Kit, 0.25 second maximum. (2) mu-lS/B Kit, 0.85 second maximum. 0.65 second minimum. b. Velocity of 80 pound weight. The ejector shall accelerat
49、e the 80 pound weight to a minimum velocity of 120 feet per second within a distance of not more than 42 inches, Failure to meet these time requirements, or travel of more than 42 inches before the 80 pound weight achieves the specified velocity shall be cause for rejection, 5. PREPARATION FOR DELIVERY 5.1 Presewation & packaging shall be level A or C as specified (see 6.2). 5.1.1 Level A. MIL-P-116 and special instructions raceived from the procuring activity. Items will be preserved and packaged in accordance with 5.1.2 Level C. Items will be packaged in accordan
