1、. - MIL-C-LOb4 13 99797Ob 0358397 T W MIL-C-8106.4 (Wep) 21 May i964 MILITARY SPECIFICATION COURSE GYROSCOPE (For Torpedo Mk 46 Mod O) This specification has been approved by the Bureau of Naval Weapons, Department of the Navy. 1. SCOPE 1.1 This specification covers one type of Course Gyroscope (LD
2、541118) for use in a torpedo. The mechanically started, electrically sustained Course Gyroscope is of one type and class, and is referred to herein as the Gyro. 2. APPLICABLE DOCUMENTS 2.1 Government documents. The following documents of the issue in - effect on date of invitation for bids, form a p
3、art of this specification t the extent specified herein: SPECIFICATIONS Military MIL- P-116 MIL-E-5272 Preservation, Methods of Environmental Testing , Aeronautical and Associated Equip ment , General Specific a- tion for STANDARDS Military MIL-STD-129 MIL- STD-130 Marking for Shipment and Storage I
4、dentification Marking of U. S. Military Property c. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-STD-143 Specifications and Standards, Order of Precedence for the Selection of MIL- STD-44 O MS33586 DRAWINGS Bureau of Naval Weapons LD 541118 So
5、ldering Techniques for Standard Type Solder Terminals Metals, Definition of Dissimilar Gyroscope, Course and all Documents Listed Thereon LD 269686 Gyroscope y Course y Shipping (Packing) Condition and all Documents Listed Thereon 2047211 Gyroscope, Course PUBLICATIONS Bureau of Naval Weapons QAP 60
6、215 Quality Assurance Provisions for Gyroscope, Course (Copies of documents required by contractors in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer, ) 2-2 Other publications. The following documents form a par
7、t of this specification to the extent specified herein, Unless otherwise indicated, the issue in effect on date of invitation for bids shall apply. NATIONAL BUREAU OF STANDARDS Handbook H28 Screw-Thread Standard for Federal Service (Application for copies should be address to the Superintendent of D
8、ocuments, Government Printing Office, Washington 25, D. C, ) 2 C d Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3. REQUIREMENTS 3,1 Preproduction sample, Unless otherwise specified in the contract or order, a preproduction sample shall: (a) Be man
9、ufactured using the procedures proposed for the production lot. (b) Consist of three Gyros, (c) Be tested as specified in section 4 herein and is for the purpose of determining that, prior to starting production, the suppliers production methods are capable of yielding items that comply with the tec
10、hnical requirements of the contract, 3,2 Basic requirements. 3.2,1 Materials and treatments of materials and parts. Unless other- wise specified in the contract or order, all materials and treatments of materials and parts used in the manufacture of the Gyro shall be in accordance with the requireme
11、nts specified herein and with the applicable documents listed on BuWeps LD 541118, 3.2,l. 1 Selection of materials. Specifications and standards for all materials, parts, and Government certification and approval of processes and equipment, which are not specifically designated herein, and which are
12、 necessary for the execution of this specification, shall be selected in ac- cordance with Standard MIL-STD-143, except as provided herein. AN, JAN, or MS Standard parts shall be identified on the drawing by their part numbers. Commercial utility parts such as screws, bolts, nuts, and cotter pins, m
13、ay be used, provided they possess suitable properties and are replaceable by the AN, JAN, or MS Standards parts without alteration, and provided the cor- responding AN, JAN, or MS Standard part numbers are referenced on the parts list and, if practicable, on the contractors drawings. In the event th
14、ere is no suitable corresponding standard part in effect on date of invitation for bids, commercial parts may be used provided they conform to the require- ments specified herein, 3-2.2 Gages. The supplier shall provide whatever gages are necessary and adequate to assure that the material and parts
15、of the Gyro will meet dimensions and requirements shown on the applicable documents ., When requested by the supplier, the procuring activity will furnish existing pertinent drawings of Naval final inspection gages for use only in the designing of the suppliers gages. This action does not relieve th
16、e supplier of the responsi- bility for designing and manufacturing the gages needed for the satisfactory fulfillment of the contract requirements. 3“ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or netw
17、orking permitted without license from IHS-,-,-3.3.1.3.1 Yaw potentiometer surge voltage. The yaw potentiometer shall be capable of withstanding a surge voltage of 55 vrms for 5 seconds each time the unit is energized in the case of (b). 3.3.1 o 4 Uncaging current. Uncaging shall be accomplished by a
18、pplica- tion of 1 ampere dc minimum for 15 milliseconds minimum. Uncaging circuitry before firing, shall present a 2 * 0,7 ohm load. 3,3,1.5 Insulation resistance. The Gyro insulation resistance shall be 50 megohms minimum at 500 vdc applied for 15 seconds between isolated Gyro circuits and between
19、these circuits and the case, This test shall not be per- formed more than three times on any one Gyro. 3.3.1,6 Wound and caged condition indication. The Gyro shall have a positive means of indicating wound and caged condition. 3.3,l 7 Gimbal orientation. The Gyro shall be caged with the gimbals orie
20、nted orthogonally with respect to each other within *l degree, 3.3.2 Performance characteristics. 3.3.2.1 Normal-plane drift rate. With the Gyro positioned in normal plane (BuWeps dwg. 2047211), the drift rate shall be limited to a maximum de- fined by one or the other of the following: (a) The Gyro
21、 static drift rate shall not exceed two degrees per min- ute with the sustainer motor energized. (b) A 7.5 degree Scorsby drift rate shall not exceed 2, O degrees per minute for 9 minutes, with Gyro sustainer motor energized at 30 seconds after uncaging., and with the Gyro mounted in any direc- tion
22、 on the Scorsby table, (c) The yaw output excursion, during the above 9 minute Scorsby operation, shall be between 8 and 14 degrees, 3,3,2,2 Scorsby-action drift rate, The Gyro drift rate with 7-5 degree Scorsby action, when only the spring motor is operating, shall not exceed 1.5 degrees in 30 seco
23、nds after unceing, 3.3.2.3 Yaw potentiometer wiper position, When the Gyro is caged, the yaw potentiometer wiper shall be centered on the potentiometer within one degree. . 3.3.2.4 Yaw pickoff potentiometer wiper arm displacement. The yaw pickoff potentiometer wiper arm shall not be displaced more t
24、han one degree at 0.5 second after uncaging the Gyro, Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-3.3-3 Service life, The Gyro shall meet the requir
25、ement of 3,3.2,1 throughout its mission time of nine minutes. 3.3,4 Life, total operating. The unit shall be capable of satisfactory operation for a total of 25 operating cycles after receipt by the procuring activity. 3.4 Environmental requirements. Unless otherwise specified, the Gyro shall be cap
26、able of conforming to the performance and product characteristics requirements of this specification after .being exposed, at any temperature in the applicable range, to the environments and under all unit conditions (see 6,3.1) specified in this section. 3.4.1 Vibration (see 6.3.2). The Gyro shall
27、be capable of withstanding the vjbration shown in table I. Table I Vibration Schedule Unit Double Amplitude Acceleration Frequency Condition (in) minimum (g) minimum (CPS) Non- O, 75 - 5-6 - 1.3 6-16 o. 1 - 16-24 3.0 24-40 operating - I O. 036 I - I 40-74 I - I 10, o I 74-500 Operating O. 050 ;to. 0
28、05 - 5-20 - 1.0 *0,1 20-32 - r o. 020 002 I I 32-56 1 I - I 3. O *O. 3 I 56-500 I 3,4.2 Shock (see 6.3.3). The Gyro shall be capable of withstanding shock specified in table II. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Table II Shock Schedul
29、e Unit Condition Peak Magnitude (gs) Nonoperating Ready non- operating 60 Ready 45 85 300 I perating 85 Minimum Durnation (ms) 8. O 20. o 0,5 op 5 O, 5 Acceleration Direction Fwd Aft - ance of the preproduction sample shall be based on no defects in the sample. Further production of the Gyro by the
30、supplier, prior to approval of the prepro- duction sample, shall be at the suppliers risk. 4.3.2 Periodic production sampling. Periodic production tests detailed in 4.6 shall be performed at an activity designated by the procuring activity. Samples shall consist of units that have satisfactorily pas
31、sed the acceptance tests and examinations detailed in 4.7; selected as follows: (a) Step 1, Upon initiation of production, randomly select 5 units from each group f 10 units. pon satisfactory compliance of samples selected from 3 consecutive groups, proceed to step 2. (b) Step 2. Randomly select 5 u
32、nits from each group of 25 units. Upon satisfactory compliance of samples selected from three consecutive groups, proceed to step 3. (c) Step 3. Randomly select 5 units from each group of 50 unitso Continue with step 3 for the balance of the contract or until a defective unit is found. 4.3.2,l Defec
33、tive units. When a defective unit is found in any group the supplier shall: Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-(a) Determine the cause of the defects. (b) Determine if the defect is an isolated case. (c) Take necessary action to eliminat
34、e the defects from units on hand, and if so directed by the procuring activity, from those units previously shipped. (d) Submit to the procuring activity for approval, the proposed cor- rective action to prevent recurrence of the defect. (e) Return to step 1 (4,3.2(a) and proceed as indicated for in
35、spection of units subsequently produced. 4.3.3 Acceptance sampling. The tests and examinations specified in 4.7 shall be conducted on each Gyro to be delivered; therefore, there shall be no sampling plan for acceptance, Defective units shall be rejected, 4,4 Test conditions. Unless otherwise specifi
36、ed, the Gyro shall be sub- jected to tess under the following conditions: (a) Temperature Room ambient (60 to 95 degrees F) (b) Humidity (Relative) Room ambient, up to 95 percent (c) Altitude Normal ground atmospheric pressure 4.5 Preproduction tests. The Gyros within the preproduction sample (ident
37、ified as Gyros 1, 2 and 3) shall be subjected to the tests specified in table V. Certified inspection data covering the results of preproduction tests shall be forwarded to the Bureau of Naval Weapons. Certified inspection data shall consist of the following: (a) Date of tests and names of persons c
38、onducting the tests. (b) Run or test plan used. (c) Serial number of the Gyro. (d) Test results of preproduction tests (4.5.2 through 4.5.3), 4,5.1 Preproduction test equipment. The following items of test equip- ment are required to perform the preproduction tests specified herein: 4,5.1 1 A vibrat
39、ion table capable of vibrating a 9 pound load, plus fix- ture weight, at 10 gs maximum over a frequency range of 5 to 500 cycles per second with a maximum double amplitude of O. 75 inch. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81064 (We
40、p ) Table V Preproduction Test Schedule Sequence I Test Test Description 1 I Acceptance Tests and Examinations (4-7). 2 Vibration (4.5.2. i), 3 Shock (4,5.2.2), 4. Acceleration (4.5,2.3). 5 Temperature, storage (4,5.2,4,1), 6 Temperature, operating (4,5,2,4,2) o 7 Pressure test (4,5,2,5), 8 Humidity
41、 test (4,5.2,6). 9 Life test (4,5.2, 7), 10 Acceptance Tests and Examinations (4,7). Computer Number 4.5,1,2 A shock testing machine capable of applying shocks of up to 300 gfs maximum at durations from 0,5 to 21 milliseconds. 4,5.1.3 A centrifuge capable of exerting acceleration forces up to 35 gs
42、magnitude for periods of three minutes minimum, 4,5,1,4 A temperature chamber capable of programmed temperature variations over a range of -45 to +140 degrees F. 4,5, ,5 A humidity chamber capable of providing a constant humidiy condition of 95 percent at 100 degrees F for extended periods up to 8 h
43、ours, 4.5,1,6 4,5.2 Detailed preproduction tests, 4.5.2,i Vibration Items of test equipirient specified in QAP 60215, . 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.5,2,1.1 Nonoperating. The Gyro shall be vibrated for a total of 9 hours (3-4.
44、1, and tables I and VI) in accordance with the requirements of pro- cedure XII, Specification NIIL-E-5272 and the vibration deviations of 4.5,2,1.1.1, 4.5,2,1,1 o 1 Vibration deviations, The following deviations from pro- cedure XU, Specification MILE-5272. Individual resonance suxveys shall be cond
45、ucted with vibration applied along each of three mutually perpendicular axes , The resonant and cycling periods in each axis shall be in accordance with table VI, with one hour at the appropriate low temperature (-45 degrees F), one hour at room temperature, and one hour at 140 degrees F. Table VI R
46、esonant and Cycling Schedule (Nonoperating) No. of Time at Resonance at Cycling Time at Resonances Each Temperature (Minutes)“ Each Temperature (Minutes) O O 9 18 27 36 60 51 42 33 24 *Nine minutes at each resonance at each temperature, 4.5.2.1,2 Operating. The Gyro shall be conditioned at room temp
47、erature for a minimum of one hour and subject to the vibration frequencies and ampli- tudes specified for operating condition of table I, along each of three mutually perpendicular axes. The log frequency sweep between 5 and 500 cycles shall be conducted in 7.5 minutes. The log frequency sweep betwe
48、en 500 and 5 cycles shall be conducted in 7.5 minutes. The log frequency sweep between 500 and 5 cycles shall be conducted in 7,s minutes. The Gyro must be rearmed and fired prior to each sweep. The remainder of the Stminute gyro-run time in both cases at resonance points shall be as listed in table
49、 VU, 13 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-81064 (Wep) Table VII Resonant and Cycling Schedule (Operating1 Number of Time at Total Resonances Resonance Time O O 7.5 1 O, 5 8. O 2 1, o 8.5 3 1.5 9. o 4.5,2.2 Shock 4.5.2.2.1 that a minimum of 90 percent of the table input of the f
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