1、flIL-L-81745B (2) PA 9999906 0427605 4 R I INCH-POUND I MIL- L-81745B(AS) AMENDMENT 2 . AMENDMENT 1 9 January 1986 MILITARY SPECIFICATION LAUNCHER CONTAINER, “A“ SIZE SONOBUOY LAU - 126/A This amendment forms a part of MIL-L-81745B, dated 26 September 1985, and is approved for use by the Naval Air S
2、ystems Command, Department of the Navy, and is available for use by all Departments and Agencies of the Department of Defense. PAGE 1 Top right, document identifier: Delete “MIL-L-81745B“ and substitute “MIL-L-81745B(AS)“ and add “(AS)“ to document identifier top center of all remai ni ng pages. * T
3、op right, above document identifier: in a rectangular box. Add the words “INCH-POUND“ and place PAGE 2 * 2.1.2, under DOCUMENTS, Naval Weapons Support Center, Crane, IN: Delete Size Store Packaging Test Procedures“ .e v distribution is unlimited. I 1 of 5 Licensed by Information Handling ServicesflI
4、L-L-l795B (2) PA W 777770b 0427606 b MIL-L-81745B(AS) AMENDMENT 2 PAGE 6 * 3.4.1.3, line 3: Delete “t160F“ and substitute “+160F“ PAGE 7 * Add as new paragraph 3.4.2.4: “3.4.2.4 Corner droD, accelerated hand1 inq. (Note: This paragraph applies only when the store weighs 30 pounds (13,6 Kg) or less.)
5、 equivalent dummy store installed and stabilized at a temperature of 75 F 10F (23.9OC 5,5OC), the SLC shall be drotped from a height of 22 inches (55.9 cm) with the muzzle end down and at a 15 - 5 angle to the vertical onto a flat concrete surface. The SLC shall be accelerated by gravity and shall c
6、ontact the concrete surface on its end at the angle indicated. During the test the SLC shall be allowed to bounce to a halt, but tipover onto the breech end is not required. After the drop the SLC shall remain completely intact including the muzzle cap and its parts. The retention mechanism may be d
7、eformed by the drop, but longitudinal displacement of the muzzle cap from the muzzle end shall be less than 0.13 inch (0.33 cm). The SLC and its component parts shall not break or crack, but stress whitening of the muzzle and muzzle cap is allowed. Note: This is an SLC test only, and store function
8、or test thereof is not required following the test.“ With sonobuog or 34.3.4: Delete all 4 lines. Redundant to 3.4.3.4 on page 8. PAGE 8 * 3.4.3.4, line 4: Delete “JAU-l/B“ and substitute ItJAU-22/B“ * 3.5.1, line 5: Delete “JAU-l/B initiator, a“ * 3.5.1, line 7: Delete “STF-TP-101“ and substitute “
9、NAC TP 622“ PAGE 9 First paragraph (unnumbered), line 1: Delete “seconds duration are permitted“ and substitute “3.5.1.2 Launchinq. shall yield during launch to the force transmitted through the store. reactive load on the aircraft launch tube structure shall be not greater than 2,000 pounds (8,896
10、N) . (15,568 N) and 4 milliseconds duration are permitted.“ * 3.6.1, line 7 and line 12: The muzzle cap release mechanism The Transient loads not greater than 3,500 pounds Delete “TE21077“ and substitute “3065AS100“ * 3.6.1, line 8: Delete “1458AS120“ and substitute 13065AS100“ PAGE 12 * 3.6.4, 1 in
11、e 4: Delete “1458AS120“ and substitute “3065AS100“ * 3.6.5, line 2: Delete “JAU-l/B or“ * 3.6.5, 3.6.5.1, 3.6.5.2, 3.6.5.4, 3.6.5.5, and 3.6.6: Delete “TE21077“ and substi tute “3065AS100“ 2 Licensed by Information Handling ServicesMIL-L-81745B (2) PA 7977706 0427b07 M MIL-L-81745B(AS) AMENDMENT 2 P
12、AGE 13 * 3.6.7, line 12: Delete “1458AS120 and substitute “3065AS100“ * 3.6.8: Delete and substitute: “3.6.8 Muzzle caD release mechanism. A mechanism shall be provided for retention of the store in the bore of the SLC prior to launching and release of the store at launching. The design of the mecha
13、nism shall prevent Foreign Object Damage (F0D)-producing debris by jettison of the mechanism with the muzzle cap at launch or retention of the mechanism within the muzzle. If the mechanism is retained with the SLC, no part of the mechanism shall extend beyond the muzzle after launch. The mechanism s
14、hall be readily removable and replaceable, without the use of special tools for the purpose of removing or replacing the store. The SLC and release mechanism shall withstand the application of a force not less than 600 pounds (2,569 N), applied outwardly from the direction of the store through the m
15、uzzle cap, prior to the full release of the muzzle cap (see 4.5.2.1.8). During launch the portion of the mechanism which retains the muzzle cap may deform permanently, but no material failure (shearing or cracking) of any portion of the mechanism or the SLC shall occur. Also, during accelerated hand
16、ling of the SLC, the mechanism may deform but shall not fail in any manner which would allow the store to be released (see 3.4.2.4). PAGE 14 p * 3.6.11, line 6: Delete “1458AS120“ and substitute “3065AS100“ L PAGE 16 Add as new paragraph 4.1.1: “4.1.1 ResDonsibilitv for comDliance. All items must me
17、et all requirements of sections 3 and 5. become a part of the contractors overall inspection system or quality program. The absence of any inspection requirements in the specification shall not relieve the contractor of the responsibility of assuring that all products or supplies submitted to the Go
18、vernment for acceptance comply with all requirements of the contract. Sampling in quality conformance does not authorize submission of known defective material, either indicated or actual, nor does it commit the Government to acceptance of defective material.“ The inspections set forth in this speci
19、fication shall PAGE 17 * 4.4.1, line 3: I 3 O 6 5AS 1 O O I Delete “TE21077 and Drawing 1458AS120“ and substitute PAGE 18 * 4.5.2, line 4: end of the second sentence. Add “,except for the indicated destructive tests“ at the 4.5.2.1 .l: Delete title “Obturator diameter.“ and substitute “Obturator sea
20、l inq diameters.“. the obturator diameter and the internal breech diameter are in accordance with the approved PCI.“ Delete first sentence, and substitute “Verify that both 3 Licensed by Information Handling ServicesMIL-L-81745B(AS) AMENDMENT 2 * 4.5.2.1.1, second sentence: Delete “Average“ and subs
21、ti tute “Acceptabl et! PAGE 19 * 4.5.2.1.5, line 1: Delete “that“ “assembling“ 4.5.2.1.7, first sentence: Delete “accomplishing“ and substitute * 4.5.2.1.7: the end of the paragraph. * 4.5.2.1.8: Delete and substitute: Add “The parts under test shall not be used in production.“ at “4.5,2.1.8 Muzzle
22、cap release mechanism strenqth test. Verify the strength of the muzzle cap release mechanism by either (1) assembling the mechanism to a fixture that simulates an SLC muzzle and muzzle cap and then applying the required force, or (2) applying the force directly using a production SLC and muzzle cap.
23、 The peak force required to release and fully separate the actual or simulated muzzle cap from the muzzle shall be not less than 600 pounds (2,669 N) as specified in 3.6.8. The force shall be applied at a fixed rate of .1 to 1 inch (2.5 to 25 mm) per minute. MIL-STD-105 Single Sampling Plan, inspect
24、ion level S-1 and AQL of 2.5 shall apply. The parts under test shall not be used in product i on I * 4.5.2.1.9: Delete and substitute: 5 “4.5.2.1.9 Obturator strenqth test. Verify the strength of the obturator by assembling the obturator to a fixture that simulates the minimum surface .L.- area case
25、 of sonobuoy to obturator interftce on the sonobuoy side of the obturator and that will permit a 5 pound - 1 ounce (2.27 (approximately 3.25 inth (82.6 mm) diameter) to be dropped from a height of 36 .6 cm), through a tube, onto the center of the CAD side of the obturator. circle whose center coinci
26、des with the center of the obturator. shall not crack, and stress patterns shall not be present beyond a 1.5 inch (38.1 mm) diameter circle whose center coincides with the center of the obturator. 105 Single Sampling Plan, inspection level S-1, and AQL of 2.5 shall apply.“ .O3 kg) steel ball The-bal
27、l shall strike within a 0.28 inch (7.1 mm) diameter .25 inches (91.4 The obturator The obturator under test shall not be used in production. MIL-STD- PAGE 21 6.2.2, line 5: Delete “DAR“ 6.2.2, line 6: Delete “7-104.9 (n) (2)“ and substitute “DOD FAR Supplement, Part 27, Sub-Part 27.410-6 4 Licensed
28、by Information Handling ServicesMI L - L - 81 745B (AS) AMENDMENT 2 NOTE: where changes (additions, modifications, corrections, deletions) from the previous amendment were made. Government assumes no liability whatsoever for any inaccuracies in these notations. requirements of this document based on
29、 the entire contentirrespective of the marginal notations and relationship to the last previous amendment. The margins of this amendment are marked with asterisks to indicate This was done as a convenience only and the Bidders and contractors are cautioned to evaluate the Preparing Activity: (Project PACK-N055) Navy AS , 5 Licensed by Information Handling Services
