1、- _- - _- - - - -I - .- -_ _ - - .- r-. I- r.- - . -i f MIL-C-38972 13 W 977970b 0305807 9 E .Y I I I MIL-C-38972 (USAF) . 1 June 1970 ,* 2 MILITARY SPECIFICATIOH CARTRIDGE, BONB EJECTION CCU-9 /B _. This specification is mandatory for use by USAF 1. SCOPE 1.1 cartridge designated as the Cartridge,
2、Bomb Ejection CCU-9/B here- after referred to as the cartridge. provide a source of gas pressure for forced ejection of weapons from the Aircraft Bomb Ejector Racks MAU-12A/AY MAU-l2B/A, MAU-12/CY BRU-4/AY AERO-/A, AERO-27/A and similar type racks. This specification covers the requirements for one
3、type of The cartridge is designed to 2. APPLICABLE DOCUMENTS 2.1 invitation for bids, form a part of this specification to the extent specified herein: The following documents of the issue in effect on the date of SPECIFICATIONS Military MIL-D-1000 Drawings, Engineering and Associated Lists MIL-A-2
4、5 50 Ammunition and Special Weapons, General Specification For MIL-T-7743 Testing, Store Suspension Equipment, General Specification For MIL-D - 8 13 O 3 Design and Evaluation of Cartridges for Stores Suspension Equipment -_ STANDARDS Military MIL-STD-105 Sampling Procedures and Tables for Inspectio
5、n by Attributes MIL-STD-129 Marking for Shipment and Storage MIL4 TD-130 Identification Marking of U.S. Military Property MIL-STD-202 Test Methods for Electronics and Electrical Parts MIL-STD-810 Environmental Test Methods for Aerospace and Ground Equipinent Provided by IHSNot for ResaleNo reproduct
6、ion or networking permitted without license from IHS-,-,-MIL-C-38972 13 9999906 0305808 O = 15L-C-3 89 72 (USAF) MIL-STD-831 Test Reports, Preparation of XIL-STD-116 7 MIL-STD-1168 Ammunition Data Card Lot Numbering of Aimunition Air Force 69314035 Cartridge Bomb Ejection CCU-9/B OTHER PUBLICATIONS
7、Code of Federal Regulations 49CFR Parts 71-79 Interstate Commerce Commission Regulations for the Transportation of Explosives and other Dangerous Material (The Interstate Commerce Commission Regulations are now a part of the Code of Federal Regulations (1949 Editions Revised 1965) available from the
8、 Superiatendent of Documents, Government Printing Office, Washington, D.C. cation should cite 49 CFR Parts 71-79 (Revised 1965).) Orders for the above publi- 3. REQUIREMENTS 3.1 Preproduction. This specification makes provision for prepro- duction testing. 3.2 Design and Construction. The cartridge
9、shall be constructed in conformance to Air Force drawing 69314035 and subsidiary drawings. 3.3 Function. The function of the cartridge is to provide a source . of gas pressure for forced ejection of weapons from a Bomb Ejector Rack MAU-lLB/A or similar types of ejector racks. 3.3.1 Ballistics. Two c
10、artridges, installed in a MAU-12 Bomb Ejector Rack and actuated by the “all fire“ current shall produce performance as noted below. The test store shall be as described in 3.3.2. Velo city Reaction Force -65 stabilization shall be as defined in MIL-STD-810. Temperature 4.4.3 Test Measurements. 4.4.3
11、.1 Instruments. All measurements shall be made with instruments whose accuracy has been verified. Calibration records shall be _ ._ -=- maintained, 4.4.3.2 Tolerances. The maximum allowable tolerance on test condition measurements shall be as follows: a. Temperature - plus or minus 2.8OC (5OF) e b.
12、Relative Humidity - plus or minus 5 percent. C. Vibration and Shock Amplitude - plus -or minus 5 percent. d. e. Vibration Frequency - plus or minus 2 percent. Current - plus or minus 2 percent. f. g. Resistance - plus or minus 2 percent. Time Interval - plus or minus 2 percent. h, Pressure - plus or
13、 minus 5 percent. i. Reaction Force - plus Qr minus 5 percent. j. Velocity - plus or minus 5 percent. k. Sound level - plus or minus 2 percent. 4.4.4 Required Measurements a, Resistance of unit prior to firing. 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license fr
14、om IHS-,-,-MIL-C-38772 13 W 7779706 0305816 T EL-C-3S972 (USAF) b. C. d. e. f. g* h. Firing current. Firing time. Pressure vs time. Reaction force vs time. Pitch Rate vs time. Velocity For preproduction testing, the cartridge number shall be recorded. i. Other measurements shall be taken as specifie
15、d in preproduc- . tion schedule and test plan. 4.5 Test Methods . 4.5.1 Classification of Tests. Inspection and testing of the cartridge shall be as shown in Table I. 4.5.2 Examination of Product. 4.5.2.1 Examination of Components. One hundred percent examination shall be performed for all draiting
16、characteris tics when the component lot size is not in excess of 1000 cartridges. For lot sizes in excess of 1000 cartridges, sampling inspection will be performed utilizing a plan acceptable to the procuring agency, in accordance with MIL-STD-105. Failure to comply with all drawing and specificatio
17、n requirements shall be cause for rejection. 4.5.2.2 Examination of Assemblies. One hundred percent examination shall be performed to determine drawing compliance with all require- ments of the assembly drawing and this specification when the assembly lot size is not in excess of 1000 cartridges. Fo
18、r lot sizes in excess of 1000, sampling inspection will be performed to determine drawing compliance utilizing a plan acceptable to the procuring agency in accordance with MIL-STD-105. 4.5.3 Conformance to Drawings. Each cartridge shall be inspected for strict conformance to the engineering drzwings
19、, and to specifications and standards referenced therein. Failure to meet these criteria shall be cause for rejection. 10 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38972 13 m 997970b 0305817 1 MIL-C-38972 (USAF) 4.5.4 X-Ray Examination. E
20、ach Cartridge of the preproduction test sample shall be subjected to X-ray examination. shall be identified by date, cartridge part numbers, lot number and serialnumbers. compliance with the requirements of this specification. 4.5.5 Ail Fire Sensitivity. Cartridge shall be tested according to - Tabl
21、e II. ballistic requirements of this specification, shall be cause for re j e ct ion. X-ray photographs These X-ray photographs shall be examined to determine Failure of any cartridge to fire, or failure to meet the 4.5.6 No Fire Sensitivity. Cartridges shall be tested according to Table II. The car
22、tridges shall be held in a test jig. The direct. . current shall be lwatt for a duration of five minutes. the cartridge shall be cause for rejection, Firing of 4.5.7 Sympathetic Ignition. one cartridge and the other shall be sympathetically ignited. minimum velocity for the test store stated in the
23、ballistic requirements of this specification do not apply to this test. Failure of the cartridge to achieve ignition shall be cause for rejection. 4.5.8 Electrical Resistance. The resistance of the bridge wire shall be measured within an accuracy of 1 percent using a test circuit which subjects the
24、bridge wire to a current of 0.9 f. 0.05 amperes. The cartridge shall be subjected to this test current for a period not to exceed 60 seconds. This test shall be conducted in accordance with MIL-STD-POS, Method 303 e A 5 ampere current shall be applied to The 4.6 Environmental Tests. During or after
25、subjection to the environ- mental tests, as specSfied in the test, the cartridge shall be subjected to the functional tests. Failure to satisfy the requirements of the functional tests shall be considered as failure to pass the environ- mental tests and cause for rejection. 4.6.1 Static Discharge. T
26、welve (12) cartridges shall be tested to the static discharge test and shall not fire when subjected to an electrostatic discharge of 150,000 ergs from a 500 picofarad capacitor. 4.6.2 Stray Voltage. Each of forty-two (42) cartridges shall be subjected to 2000 pulses of direct current. Each pulse sh
27、all be 100 milliamperes. Duration of pulse shall be 300 milliseconds and pulse recurrent rate shall be 2.0 pulses per second. 4.6.3 Vibration. Forty-two (42) cartridges shall be subjected to vibration tests prescribed in MIL-STD-810, Method 514, Procedure 1, except that Figure 1 and Table III of thi
28、s docunent apply in lieu of Figure 1 and Table I in MIL-STD-810. Equal quantities shall be 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38972 33 m 9979706 0305838 3 m MtL-C-38972 (USAF) RANGE CURVE FOR VIBRATION TEST. ! r 10 100 1000 FREQ
29、UENCY -CPS FIGURE I i2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-38972 13 = 999970b 0305839 5 = . MIL-C-38972 (USAF) vibrated at -65F, room temperature ana +325“F after one hour soak time. Times shown in Table III refer to one axis of vib
30、ration. TABLE III VIBRATION TEST o NUkBER OF RESONANCES TOTAL TIME AT FSSONANCE TOTAL CYCLE TIME -60 minutes O 1 10 minutes 50 minutes 20 minutes 30 minutes 40 minutes 40 minutes 30 minutes 20 minutes After the vibration test the 42 cartridges shall be x-rayed and checked for electrical resistance a
31、nd ballistically tested. Evidence of any disintegration of the ignition element, igniter or propellant or derangement of any component or failure to meet the electrical resistance requirements or ballistics performance shall be cause for rejection of the lot. 4.6,4 Airtightness. One hundred and nine
32、ty-two cartridges shall be tested in accordance with Table I and shall not exhibit a leak rate of greater than 1 x pressure differential of 14 psi. Tests shall be conducted using a dry gas leak detection of sufficient sensitivity to ascertain if the cartridge meets the leak rate requirements. cc/sec
33、 when subjected to a dry leak test at a 4.6.5 High Temperature Operation. Sixty-two (62) cartridges shall be conditioned at a temperature of 163C (325F) for at least four hours. from the temperature chamber. Cartridges shall be fired within three minutes after removed 4.6,6 Low Temperature. Fifty (5
34、0) cartridges shall be conditioned to, and maintained at a temperature of -54OC (-65OF) for at least four hours. Cartridges shall be fired within three minutes after removed from the temperature chamber. 4.6.7 Temperature Shock. Forty-two (42) cartridges shall first be placed within a test chamber w
35、herein a tenperature of 163OC (325F) is maintained, The cartridges shall be exposed to this temperature for a period of four (4) hours, at the conclusion of which, and within 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-h . . -. - -_ -. MIL-C-3
36、8772 13 779770b 0305820 L m - MIL-C-38972 (USAF) five (5) minutes, the equipment shall be transferred to a chamber haviag an internal temperature of -40C (-40OF). be subjected to this temperature for a period of four (4) hours. Tnis constitutes one (1) cycle. be three (3). shall not be less than tha
37、t specifiedOand may be extended to over- night exposure to prevent interruption of the transfersequence. At the conclusion of the third cycle, the cartridges shall be removed from the test chamber, conditioned, and tested according to Table I. 4.6.8 Acceleration. Forty-two (42) cartridges shall be-
38、subjected to tests in accordance with Method 513, Procedure I of MIL-STD-810, except that the cartridge shall be capable of withstanding a sustained acceleration of 50g for at least one minute. The equipment shall The nuaber of complete cycles shall The duration of exposure at each extreme temperatu
39、re 4.6.9. Acoustic Noise, Forty-two (42) cartridges shall be subjected to tests in accordance with Method 515, Procedure I of MIL-STD-810, except for the using of an overall level of 160 db for the test level of Table II. 4.6.10 Impact Shock. Forty-two (42) cartridges shall be dropped from .a height
40、 of eight feet onto a steel plate supported by concrete. Four- teen (14) cartridges shall impact nose down, fourteen (14) nose up, and fourteen (14) horizontally. shall be cause for rejection. 4.6.11 Temperature Conditioning. Ballistic firings will be conducted in accordance with Table II. designate
41、d temperature for at least four hours. fired within three minutes after removed from the temperature chamber .- 4.6.12 Temperature and Humidity Cycling. Eighteen (18) cartridges shall be tested in accordance with paragraph 3.4.5, MIL-D-81303. the conclusion of the test the cartridges must meet the f
42、unctional requirements of.this specification and be free from visible damage. Firing of a cartridge during this test Cartridges shall be soaked at the Cartridges shall be At 4.7 4.7.1 Instrumentation, The instrumentation used to-measure the current flow is to have an accuracy of 5 1 percent. is used
43、 the root mean square ripple content shall not exceed 5 percent of the test current and the rise time of the pulse shall not exceed 50 microseconds with a maximum overshoot of 5 percent. 4.7.2 Electrical Resistance. The resistance of the bridge wire shall be measured within an accuracy of 1 percent
44、using a test circuit which subjects the bridge wire to a current of 0.9 2 0.05 amperes. Test Procedures shall be in accordance with MIL-T-7743. When a rectified current The 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- _-_ .- MIL-C-3772 13 7777
45、706 0305823 3 . cartridge shall be subjected to this test current for a period not to exceed 60 seconds, This test shall be conducte in accordance with MIL-STD-202, Method 303. . 5. PREPARATION FOR DELIVERY e 5.1 Data Cards, Data card information shall be as specified in MIL-STD-1167. 5.2 Packaging.
46、 For all levels of shipment, cartridges shall be packaged as specified by the procuring activity. 5.3 Marking. Exterior containers shall be marked in accordance with MIL-STD-129. The nomenclature shall be: Cartridge, Bomb Ejection CCU-9/B 5.3.1 Additional Marking (Explosive). In addition to marking
47、in accordance with MIL-STD-129, the exterior containers shall be marked in accordance with Code of Federal Regulations 49CFR71-79. following specific warning shall appear on the exterior container: “ELECTRIC EXPLOSIVE CARTRIDGES, Handle With Care. “ The 6. NOTES 6.1 Intended Use. The Cartridge, Bomb
48、 Ejection CCU-9/B is intended for use in the MAU-lPA/A, MAU-l2B/A, BRU-2/A, BRU-4/A, AERO 7/A Bomb Ejector-Racks or in similiar applications where a source of high pressure gas generation is required. 6.2 Ordering Data. Procurement documents should specify the following: a. Title, number and date of
49、 this specification. b. Conditions under which Government loaned property will be made available to the contractor, C. Whether preproduction tests will be conducted by the procure- ment activity. 6.2.1 Preproduction Samples. It is expected that the contract or purchase order will specify that 192 cartridges, representative of the production cartridges will be submitted to the contractor or designated lab
