1、. . , - . . .I I. a. _- 2%- .*A . . . . . ,-, . MIL-B-51373 (MU) 13 July 1973 Isee section 6) MILITARY SPECIFICATION BOMB CLUSTER, INCENDWY, TH3, 750 - POUND, M36E2 (W/O FUZE, FIN AND WIRE) 1. SCOPE 1.1 This specification covers one type of side opening cluster for use in grouping incendiary bombs f
2、or release from aircraft. 2. APPLICABLE DOCUMENTS 2.1 The following documents, of the issue in effect on date of invita- tion for bids or request for proposal, form a part of this specification to the extent specified herein : STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspe
3、ction MILSTD-1168 - Lot Numbering of Ammunition. by Attributes, DRAWINGS US ARMY MUNITIONS COMMAND EDGEWOOD ARSENAL E14-23-4081 - Bomb Cluster , Incendiary, TH3, 750-Lb. , 362 (w/o Fuze, Fin and Wire). E14-23-4083 - Bomb Cluster, Incendiary, TH3, 750 Lb. , M36E2. (Copies of specifications, standards
4、, drawings, and publications required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer ,) 3. REQUIRENEWS 3.1 Materials and components. All materials and components cited on Drawing Elk-23-4081 or
5、 on the subsidiary drawings shall conform to the Licensed by Information Handling ServicesMIL-B-SL373 13 m 7797706 0333780 9 W f specifications listed thereon or to the specific characteristics set forth .on. the drawings. 3.2 Assembl . on Drawing -+ El -23-4081, except that each bomb shall have its
6、 safety clamp, if any, removed. The cluster shall be assembled (see 6.2) as specified 3.3 Leakage. The cluster shall not leak air when subjected to a minimum internal air pressure of 10 inches of mercury gage when tested in accordance with 4.4.4.1. 3.4 Functioninq. The cluster shall function so that
7、 95 percent of the bombs shall function upon ground impact when tested and computed in accordance with 4.4 , 4.2. 3.5 Preproduction. - Prior to the start of regular production, a pre- production sample shall be produced in accordance with this specification for examination and test (see 4.3). 3.6 Wo
8、rkmanship. The cluster shall be free frm foreign matter (oil and grease) and damage which could affect its intended use. 4, QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for inspection. 4.1.1 Suppliers responsibility. Unless otherwise specified in the contract or purchase order, the supplier is re
9、sponsible for the perform- ance of all inspection requirements as specified herein, wise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection re- quirements specified herein, unless disapproved by the Government. The
10、Government reserves the right to perform any of the inspection set forht in the specificaiton where such inspections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.2 Governments res onsibility. The Government will perform test specified in 4.3.2.3 and f.
11、4.4.2. Samples shall be forwarded to the - Government test facility designated by the contracting officer, Except as other- 4.1.3 Objective evidence. The supplier shall provide objective evidence acceptable to the contracting officer that the requirements of 3.1 and section 5 for which specific insp
12、ection has not been provided in this specification have been satisfied, 2 Licensed by Information Handling ServicesMIL-B-53373 33 7777706 0333983 O 9 MIL-B-51373 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows: (a) Preproduction inspection (s
13、ee 4.3) (b) Quality conformance inspection (see 4.4) 4.3 Preproduction inspection. 4.3.1 Sample. A preproduction sample of 10 clusters shall be manufac- tured using the same methods, materials, equipment and processes as Will be used in regular production. 4.3.2 Inspection procedure. 4.3.2.1 For exa
14、mination and nondestructive test. Each cluster shall be examined in accordance with the classification of defects, the AQLs do not apply. Cluster leakage test shall be 100 percent inspection. 4.3.2.2 For destructive test (functioning), Each cluster shall be tested in accordance with 4.3.2.4. 4.3.2.3
15、 Functioning test (see 6.2)_. The cluster assembled in accordance with Drawing Ei4-23-4083 and with the tail fuzes set to function 16 second6 after release from the airplane, shall be dropped from an altitude of 7,000 + 500 feet traveling at 600 knots indicated airspeed m8xhum. The fuzes shall- func
16、tion, ignite the detonating cord, and burst the cluster emitting all of the bombs. fuzing or installation of the cluster, that cluster shall be disregarded and the results computed on the basis of the nine remaining clusters. of percent functioning shall be recorded in the following ranges: 4.4.4.2
17、for formula to be used in determining percent functioning,) Should one of the clusters fail to function due to improper .: .: ;i “ 2 Data (See (a) 98.1 to LOO (b) 97.1 to 98.0 (CI 95.0 to 97.0 4.3.3 Acceptance/rejection criteria. The preproduction sample (see 6.3) shall meet the examinations and tes
18、ts specified herein to be accept- able. The supplier shall obtain written approval from the contracting officer prior to proceeding-with regular production. . 4.4 Quality conformance inspection. J 4.4.1 Lotting. Each lot shall be identified and controlled in accordance with MIL-STD-1168, and shall c
19、onsist of the clusters produced during one week s production. c 3 i -:, Licensed by Information Handling ServicesNIL-B-51373 13 W 797770b 0333782 2 W 11 4.4.2 Sampling. 4.4.2.1 For examination and nondestructive, test. Sampling shall be con- sucted in accordance with MIL-STD-105. 4.4.2.2 For destruc
20、tive test, Sampling shall be based on the percent functioning of the preproduction sample and table I. Table I, Sampling for functioning test : Percent of bombs functioning : Sample size for next 5 : in preproduction lots 98.1 to 100 2 custers/ot 97.1 to 98.0 3 clusters/lot 95.0 to 97.0 4 custers/ot
21、 After five production lots have been tested, the percent functioning of these five lots shall be calculated to determine the sample size for the next five production lots, etc. If any one lot falls below 95 percent functioning, that lot shall be rejected, and the next five lots shall have four clus
22、ters each dropped. No less than 90 percent of the bombs from satisfactorily dropped clusters shall be recovered. functioning shall be determined in accordance with formula in 4.4.4.2. Percent 4.4.3 inspection procedure. 4.4.3.1 For examination and nondestructive test. Sample clusters shall be examin
23、ed in accordance with the classification of defects and MILSTD-105 , except that cluster leakage test shall be 100 percent inspection. 4.4.3.2 For destructive test. Sample clusters shall be tested in accord- ance with 4.4.4.2. 4.4.3.3 Critical defects, Each cluster in the lot shall be exambed for it
24、s critical characteristic listed in the classification of defects, 4 Licensed by Information Handling ServicesNIL-6-51373 13 W 7777906 0333983 Y W 4.4.3.4 Classification of defects. (a) Cluster, incendiary bomb, 7501b., 362, W/O fuze fin, and wire, assembly (Drawing E14-23-4081) . CateRories Defects
25、 -pit ical : 1 Bab safety plunger exposed Major: AQL 0.65 percent defective 101 102 Spacer missing 103 Bmb orientation incorrect 104 105 Workmanship (3.6) Component missing or incorrectly assembled Detonating cord ends not sealed (b) Preparation for deli= (section 5). Categories Crit icsl : Defects
26、None defined . Major: AQL 1.0 percent defective 101 102 103 Strapping loose Identification marking incorrect or illegible Color marking incorrect or illegible 4.4.4 Tests. (See 6.2). 4.4.4.1 Leakage. The cluster shall be subjected to a minimum internal air pressure of 10 inches of mercury gage and o
27、bserved for pressure drop after 2 minutes. When the pressure drop is more than one thirty- second of an inch of mercury, the cluster is considered to be leaking. (See 6.4). prior to acceptance. A repaired cluster must pass the test of this paragraph 4.4.4.2 Functioning. The cluster assembled in acco
28、rdance with Drawing Elk-23-4083, and with the tail fuzes set to function in 16 sec- onds after release from the airplane shall be dropped from an altitude of 7,000 + $00 feet The fuze chal1 function, ignite the detonating cord, and burst the cluster emitting all of the bombs. satisfactorily dropped
29、clusters shall be recovered. travelong at 600 knots indicated air speed maxiraum. No less than 90 percent of the bombs from If 90 percent of the 5 Licensed by Information Handling ServicesI bombs are not recovered, additional clusters shall be dropped until 90 percent of the total number are recover
30、ed. Percent functioning shall be determfned in accordance with the following formula: x 100 Percent functioning = 1 - number of malfunctioning bombs number of bombs recovered All malfunctioning bombs shall be analyzed for cause of failure (see 6.3). 5. PREPARATION FOR DELIVERY 5.1 Preservation and p
31、ackaging. Not applicable. 5.2 Packing. 5.2.1 Level A, military pa ck. The cluster shall be packed for ship- ment in accordance with Drawing D14-23-4073 5.2.2 Level B, Limited military pack. The cluster shall be packed for shipment in accordance with 5.2.1. 5.2.3 Level C, minimum military pack-. Not
32、applicable. 5.3 Marking. In addition to any special marking in conjunction with information furnished in contract or order, packing marking shall be b accordance with Drawing D14-23-4073. 6. NOTES 6.1 Ordering data. Procurement documents should specify the following : (a) (b) Preproduction. Title, n
33、umber, and date of this specification. (1) (2) (3) Time allowed for supplier subission of samples for Name and address of test facility and shipping instruc- Time required for the Government to notify the supplier Government test and evaluation after award of contract. tions when testing is performe
34、d by the Government. . whether or not to proceed with production. . ._ . 6.2 Caution. Suppliers are advised to take necessary precautions to protect personnel from injury while assembling and tes.t;ing the M36E2 cluster, 6 el Licensed by Information Handling ServicesL MIL-B-51373 13 m 9979906 033398
35、5 8 H . MIL-B-51373 (MU) , .Y . .- . . _._ t c c 6.3 Classification of bombs, When bombs from clusters which have been air dropped are recovered, the following information should be obtained as an aid in determining the cause of failure of each bomb and corrective (if any) taken: (a) Number of bombs
36、 landing flat. (b) Number of bombs with broken bodies. (c) “Number of bombs with primers struck but not ignited, (d) “Number of bombs with primers not struck. (e) Number of bombs with first fire failure. (f) Number of bombs with first fire burned but filling not ignited. (g) Number of bombs with the
37、rmate blown out. (h) Number of bombs exploded (on ground or in air). (i) Number of bombs not ejected from cluster adapter. Vhe angle of impact should be determined for these bombs. When the cause of failure falls in more than one of the above categories only the primary cause shall be considered. 6.
38、4 Repair of leaky clusters. Any cluster found to be leaking may have its leaking point(s) located by immersing the cluster in water containing a suitable wetting agent , subjecteing the cluster to an internal air pressure of 12 5 2 pounds per square inch gage, and observing for bubbles. The leakage
39、may then be repaired. 6.5 Cmponent specifications Cmponent specifications for the 362 clusters are: Title Number Bmb, Incendiary, Lib, TH3, Ml26 MIL-B-23360 Cord, Detonating MIL-C-17124 Adapter, Bab Cluster, 75O-lb , M30E2 MIL-A-51372 6.6 Supersession data. This specification supersedes Edgewood Arsenal Purchase Description EA-C-1079, 10 July 1970. Custodian : Preparing activity : Frojcet No. 13254330 7 U. S GOVERNMENT PRINTING OFFICG l973 - 71% 14$/771 Licensed by Information Handling Services
