1、MIL -W -5 49 2 A(AS GI 12 FEBRUARY 1957 QuDersedine: MILITARY SPECIFICATION WATCH, POCKET, NAVIGATION MASTER This specification has been approved by the Department of the Air Force and by the Navy Bureau of Aeronautics. 1. SCOPE 1.1 This specification covers one type of master navigational watch. 2.
2、 APPLCCABLE DOCUMENTS 2.1 The fo and vertical with the 3.7 Lubrication.- The watch shall be furnished with sufficient lubricant to provide for a least 1 year of operation. that satisfactory lubrication will be provided when the watch is run at temperatures ranging from +35O to -20. 3.8 Performance.-
3、 The watch shall satisfy the performance requirements specified in section 4. The lubricant shall be of such quality 3 Licensed by Information Handling Services.OSO *.O03 1 t.003 WIDTH OF LIWES: 5 MINUTE GRADUATIONS .O20 f.001. HOUR NUMERALS .O15 f.001. muR AND MINUTE GRADUATIONS, MINUTE NIRERALS AN
4、D GCT ,010 f.001. L .200 t.003 DlNR4SIONS IN INCHES. Figure 1. Dial and hands .,. :. . ., I . Licensed by Information Handling ServicesMIL-W-5V92A bb W 999970b 0325079 O MIL-W-s492A(ASG) 3.9 Identification of product.- The back of the case shall be etched or engraved fmydance with Standard KL-STD-l3
5、0. applied to a product, except for Qualification test samples, nor referred to in correspondence, until notice of appruval has been reoeived from the activity responsible for qualification. best practice for high-quality aircraft watches. 3.9.1 Use .of AN or MIL designations.- AN or MIL designation
6、s shall not be 3.10 Worhanship.- Workmanship and finish shall be in accordance with the 4. QUfiITP ASSURANCE PROVISIONS I 4.1 Classification of tests.- The inspection and testing of watches shall be classified as follows: (a) Qualification tests: Qualification tests are those tests performed on samp
7、les submitted for approval as qualified products . (b) Acceptance tests: Acceptance tests are those tests performed on individual lots which have been submitted for acceptance, 4.2 Test conditions.- Except as otherwise specified herein, all tests shall be conducted at room temperature (approximately
8、 23C) and at atmospheric pressure Of appraximately 29.98 inches of mercury. 4.3 Qualification tests.- 4.3.1 Sampling instructions.- The Qualification test samples shall consist of two watches of each manufacturers part number upon which qualification is desired. Samples shall be identified as requir
9、ed and forwarded to the activity responsible for qualification, designated in the letter of authorization from that activity, tests of this specification as described under Acceptance tests, (See 6.4.) 4.3.2 Tests.- The Qualification tests of watches shall consist of all the 4.4 Acceptance tests.- T
10、he Acceptance tests shall consist of Individual tests. 4.b.l Individual tests. - Each watch submitted for acceptance under contract shall be subjected to the following tests. 4.4.1.1 determine conformance with this specification with respect to material, workmanship, and construction. Tests shall be
11、 conducted in the order listed. Examination of product.- Each watch shall be carefully examined to 4.4.1.2 Daily rate, room temperature, horizontal position.- The watch shall be run for 1 day to allow it to settle darn. be determined for a period of 5 days with the watch in a horizontal position, di
12、al up, and with daily winding. shall not exceed 5 seconds. not exceed 2 seconds. The daily rate of the watch shall then The average of the daily rate during the test period The average variation from the average daily rate shall . Licensed by Information Handling ServicesMIL-W-5q72A bb 799770b 02250
13、80 7 MILW-! and the fact that the Govern- ment may have formulated, furnished, or in any way supplied the said drawings, specifications, or other data is not to be regarded by implication or otherwise as in any manner licensing the holder or any other person or corporation, or conveying any rights or permission to manufacture, use, or sell any patented invention that may in any way be related thereto. Custodians: Navy - Bureau of Aeronautics Air Force 8. B h Licensed by Information Handling Services
