1、 MIL-c-(MU) 25 February 1969 MILITARY SPECIFICATION CATAPULT, AIRCRAFT EJECTION SEAT: XM37 ASSEMBLY 1. SCOPE 1.1 This specification oovers Catapult, Aircraft Ejection Seat: XM37 Assembly for use in conjunction with other propellant actuated devices in aircrew emergency escape systems. 2. APPLICABIE
2、DOCUMFNTS 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein: SPECIFICATIONS Military MIL-A- 25 50 STANDARDS Military MI L-STD - 105 MIL-STD-109 MS-28741 DRAWINGS Munitions Command
3、 F10551840 8826679 8826680 IEL- 10551840 - Ammunition and Special Weapons, General Speci- fication for - Sampling Procedures and Tables for Inspection - Quality Assurance Terms and Definitions - Hose Assembly-Detachable End Fitting, Medium by Attributes Pressure - Catapult, Aircraft Ejection Seat, X
4、M37, Assembly - Container , Ammunition, Fiber , M424 for Catapult , - Box, Packing, Ammunition, for Catapult, M9 in - Inspection Equipment List for Catapult , AircEaft M9 Fiber Container , 424 . Ejection Seat , XM37 Assembly (Copies of specifications , standards and drawings required by suppliers in
5、 connection with specific procurement functions should be obtained from the pro- curing activity or as directed by the contracting officer.) Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-244 23 9999906 O432b4 4 = i 3.1 General.- Materials, pa
6、rts and assemblies shall comply with the requirements specified on the applicable drawings, referenced specifications and the following: 3.2 Torque.- Torque shall be as specified in Table I. No loosening or deformation shall occur upon application of the breakaway torque. Table I Components Breakawa
7、y Seating or Bottoming (Inch-Pounds ) (Inch-Pounds ) (Minimum) Breech, Launcher and Tube, Launcher 500 + 50 400 Trunnion and Tube, Launcher 400 f 50 200 (Applied between trunnion and motor tube head) 3.3 Residual magnetism.- The assembled catapult shall not deflect the indicator of the compass more
8、than 3 degrees in either direction when passed in front of the compass at a distance of 6 inches. 3.4 Functional. 3.4.1 Ballistics. - The catapult , loaded with acceptable explosive com- ponents, shall function without mechanical failure (see 6.2). 3.4.1.1 Booster section.- The booster se,ction shal
9、l propel a 350 pound mass and shall comply with the requirements of Table II. 3.4.1.2 Rocket section.- The rocket section shall comply with the re- quirements of Table III. 3.4.1.3 Initiation.- The catapult shall be fired by a source delivering an output equal %o that of an M3A1 Initiator at the end
10、 of 10 feet of air- craft hose, size no. 4, MS 2874.1, at YO0 - + 5OF. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-o a, rn d El rl O In o a, rn .ri rl rl .rl l o a, rn rl .rl l A s CU o a, v1 ho O O m o a, v1 .rl =I *El O rn rl o a, rn ho O In
11、m o a, rn o a, v1 ho O s H H H 3 s B hohoho O00 CUCUCU 999 O InInIn ggIn goo 3.9m Ln Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-L4884 13 9799906 0433866 8 I T r MI I;-C- i4884 ( MU) 3.5 Workmanship.- The requirements for workmanship are as
12、 specified on the applicable drawings, referenced specifications and the following: 3.5.1 Metal defects.- All components shall be free from cracks, splits, cold shuts, inclusions, porosity or any similar defect. 3.5.2 Burr.- No part shall have a burr which might interfere with the assembly or functi
13、on of the item or which might be injurious to personnel handling the item. 3.5.3 Foreign matter.- No part or assembly shall contain chips, dirt, grease, rust, corrosion or other foreign matter. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inmection. - Unless otherwise specified in the cont
14、ract or purchase order, the supplier is responsible for the performance of all inspection requirements as specified herein. Except as 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 speci-
15、fied herein, unless disapproved by the Government. The Government reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Quality assurance terms and defi
16、nitions.- Reference shall be made to MILSTD-109 to define quality assurance terms used. 4.1.2 Inspection .- Inspection shall be in accordance with MILA-2550 except as specified herein. 4.2 inspection provisions. 4.2.1 Lot. - 4.2.1.1 Submittal of product.- The product shall be submitted in accordance
17、 with MIL-STD-105. 4.2.1.2 Size of lot.- A lot shall consist of an idedifiable group of assembled units containing metal parts assemblies produced by a homogeneous process and loaded with accepted cartridges. 4.2.2 Examination. - One hundred percent examination shall be performed Examination for maj
18、or and minor, defects shall be for all critical defects. performed on a defect basis in accordance with the classification of defects contained herein, using the sampling plan and associated criteria in Table IV. The total number of allowable defects per class for either the major or minor classific
19、ation shall not exceed the acceptance number of Table IV. conforming material shall be rejected, used in performing visual examination for such defects as burr and foreign matter. All non- Four power (4X) magnification may be 4 o Provided by IHSNot for ResaleNo reproduction or networking permitted w
20、ithout license from IHS-,-,-7 MIL-C-14884 13 = 7777706 0431867 T MIL-c-l4884() Table IV Major Mino r Lot Size Sample Size Accept Reject Accept Reject i - 300 100% Examination 301 - 800 50 O 1 801 - i800 90 1 2 1801 - ioooo 200 2 3 1 2 2 3 3 4 4.2 2.1 Igniter, Primary Assembly, Dwg . F10524201, cover
21、ing Dwg . F10551840. a detail of Def ec% CRITICAL Method of Inspection 1. Metal defective 2. Primer missing 3. Mixed lots of igniters 4. Marking missing, incorrect or illegible MAJOR 101. Primer pocket not sealed 102. Burr 103. Foreign matter MINOR None defined Visual Visual Visual Visual Visual Vis
22、ual Visual 4.2.2.2 Dwg . 10551840. Igniter, Auxiliary,Assembly, Dwg. D8596874, covering a detail of CRITICAL 1. Igniter composition missing or loose 2. Mixed lots of auxiliary igniters 3. Marking missing, incorrect or illegible 4. Metal defective Manual & Visual Visual Visual Visual MAJOR 101. Burr
23、102. Foreign mtter 5 Visual Visual Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-1488Y 13 W 7797706 0431868 L M I 1: L-C- i4884 MIT ) 4.2.2.2 (Contd) Defect Method of Inspect ion MINOR 201. Varnish missing or inadequate Visual 4.2.2.3 Holder,
24、 Strip, Loaded, Assembly, Dwg ., 8596873, covering a detail of Dwg. F10551840. CRITI CAL 1. Propellant missing or loose 2. Cable, ball missing or improperly assembled MAJOR 101. Burr - 102. Foreign matter MINOR None defined Manual & Visual Visual Visual Visual 4.2.2.4 Dwg. F10551840. Grain, Propella
25、nt Inhibited, Dwg. F8597595, covering a detail of CRITICAL 1. 2. Inhibited grain damaged 3. Wrapping loose 4. Voids in wrapping End inhibitors missing or loose MAJOR 101. Foreign matter MINOR None defined Visual Visual Visual Visual Visual 6 Provided by IHSNot for ResaleNo reproduction or networking
26、 permitted without license from IHS-,-,-MIL-C- 14884 (MU) 4.2.2.5 Assembly, Dwg. F10551840, less all Dwgs. except F8596873, e F8596902 and Standards MS-16997-30, MS-29513-19, and MS-35337-42, Defect CRITI CAL Method of 1 nspection 1. improper assembly 2. Any part missing Visual Visual MAJOR 101. Vis
27、ual 102. Burr Visual 103. Foreign matter Visual Piston slider valve not attached to holder strip on sase side as propellant MSNOR Visual 201, Sealing compound missing fromthread CRITICAL 1. Improper assembly 2. Any part missing Visual Visual MAJOR 101. Length from face of cylinder to face of grain c
28、ollar Measure 102, Burr Visual 103. Foreign matter Visual MINOR None defined 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.2.2.7 Assembly, Dwg. F10551840, less all Dwgs. except F10551837 and Standards m-29513-228, and MS-29513-230. Defect Metho
29、d of Inspection CRITICAL 1. Improper assembly 2. “O“ ring missing 3. Nozzle cups missing or loose MAJOR 101. Burr 102. Foreign matter MINOR None defined Visual Visual Manual & Visual Visual Visual CRITICAL 1. Improper assembly 2. Any part missing MJOR 101. “O“ ring damaged 102. 103. Burr 104. Foreig
30、n matter Locking wire damaged, twisted or kinked MINOR None defined 8 Visual Visual Visual Visual Visual Visual Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Defect CRITICAL Method of Inspection 1. Cable ball not secured in holder on can 2. Imprope
31、r assembly 3$ Any part missing Visual Visual Visual MAJOR None defined MINOR None defined 4.2.2.10 Assembly, Dwg . Fi0551840 , less all Dwgs . except A8593299 F8596904, D8596909, 8596910 , 8596915, F8597936 and Standards MS-29513-12 , and s-2951?-18 CRITICAL 1. Improper assembly 2. Any part missing
32、3. Gas port obstructed MAJOR 101. Burr 102. Foreign matter MINOR 201. Shtpping plug missing 4.2.2.11 Assembly, Dwg. F10551840. CRI TICAL 1, Improper assembly 2. Labels missing, incorrect or illegible Visual Visual Vi sua1 Visual Visual Visual Visual Visual 9 Provided by IHSNot for ResaleNo reproduct
33、ion or networking permitted without license from IHS-,-,-MIL-C-1q 13 = 7797706 0431872 3 MI L-C- i4884( MU) 4.2.2.11 (Cont d) Defect Method of Inspection MAJOR 101. 102. 103. Centerline of lugs not aligned with mounting hole in head Gage Length from centerline of mounting hole to centerline of lugs
34、Gage Lead seal and wire assembly missing or improperly as sembled Visual MINOR 201. Zocation of labels, incorrect 202. Varnish missing or inadequate Visual Visual 4.2.2.12 Container, Ammunition, Fiber, M424 for ,Catapult, Mg, Dwg, 8826679. CRITICAL None defined Mp, JOR None defined MINOR 201. 202. C
35、ontents loose 203. 204. 205. 206. 207, 208. Color of tape incorrect Gap between body and cover, max. Metal ends loose or distorted Cut or damaged through all impregnated layers Marking missing, incorrect or illegible Tape incomplete or badly wrinkled Length of tear tab, min. Manual Manual Manual Vis
36、ual Visual Visual Visual Visual 4.2.2.13 Box, Packing, Ammunition, for Catapult, M9 in Fiber Container, M424, Dwg. C882b680. CRITICAL None defined 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-C-14884 13 U 7777906 0433873 5 W MI L-C- 14884(
37、 MU) 4.2.2.13 (Cont a) Defect MAJOR None defined MINOR Method of Inspection 201. 202. 203. 204. 205. 207. 206. 208. Contents loose Manual Hardware missing, loose, broken or? improperly engaged Visual &. Manual Strapping missing, loose, broken or improperly as sembled Visual & Manual Contents of box
38、exposed Visual Box damaged Visual Marking missing,incorrect or illegible Visual Number of units incorrect Visual Car seal missing,unsealed or improperly positioned Visual 4.2.3 Inspection testing.- The following tests shall be performed in accordance with 4.3. 4.2.3.1 Breakaway torque.- A breakaway
39、torque shall be applied to each Failure of any catapult to comply with the catapult threaded joint in 3.2. requirement of 3.2, Table I shall be cause for rejection of the catapult. Each sub-assembly consisting of valve shear pins (859690i, slider valve piston (8596902), slider valve cylinder and boo
40、ster tube assembly f8596893), loaded strip holder assembly (8596873), “0“ rings (MS-29513-19), cap screws (MS-16997-30) and washers (MS-35337-42) shall be subjected to the nitrogen gas test to determine that the “O“ rings are properly installed and undamaged. Any sub-assembly showing evidence of lea
41、k- age shall be cause for rejection of the sub-assembly. 4.2,3.2 11 O 11 ring security.- 4.2.3.3 Residual magnetism,- Each catapult shall be tested for excessive residual magnetism. Failure of any catapult to comply with the requirements of 3.3 shall be cause for rejection of the catapult. 4.2.3.4 G
42、overnment : Functional.- The following tests shall be performed by the 4.2.3.4.1 Ballistics. - Twenty-one units shall be tested to determine Failure of any unit to compliance with the requirements of 3.4. conditioned as provided in Table V and 4.3.4.1.1. comply with 3.4 and Tables II and III shall b
43、e cause for rejection of the lot. The units shall be temperature 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-34884 33 7797706 0433874 7 . MI L-C- 14884( MU) Table V Temperature Sample Size -65 to -7O0F 65 to 75OF i60 to 165OF 7 7 7 4.2.4
44、 Inspection equipment. - The exadnation and tests shall be made using equipment listed on TEL-10551840. 4.3 Test methods and procedures. 4.3.1 Breakaway torque.- A torque wrench set at the torque requirements The assembly shall be secured in the fixture prior to application of specified in 32, Table
45、 I shall be used to determine the adequacy of the joints. the torque. 4.3.2 “0“ ring security.- The sub-assembly shall be mounted in the device, using the fixbure for properly sealing all openings. injected to a pressure of 200 psi., minimum, and held for 15 seconds., minimum, to determine security
46、of the “O“ ring seals. Nitrogen gas shall be 4.3.3 Residual magnetism.- The catapult shall be tested for excessive the compass in anorth- residual magnetism in an area free of local magnetic effects by placing the catapult 6 inches from, and at the same height as south horizontal position with the c
47、ompass set in an east-west heading. catapult shall be moved slowly past the compass in a longitudinal direction for its entire length, rotated i80 degrees in the horizontal position and moved slowly back past the compass. The . 4.3.4 Functional 4.3.4.1 Ballistics.- The test sample shall be rigidly s
48、upported in the fixture. the temperature conditioning chamber, sample units shall be reconditioned at the original temperatures. test specified in 4.3.4.1, the Catapult sauples shall be subjected to the temperature condition specified in Table V, A simulated Catapult loaded with a dummy cartridge co
49、ntaining a temperature sensitive element shall be placed in the temperature conditioning chamber at the same time as the Catapult sam- ples. The conditioning time shall be a minimum of one hour longer than the time necessary to bring the element contained in the dummy cartridge to the required temperature. The sample
