1、MIL -I -81454(AS)AMENDMENT 316 April 2001SUPERSEDINGAMENDMENT 215 June 1970MILITARY SPECIFICATIONINDICATOR, GYROSCOPE, VERTICAL REFERENCEID -1481 (*)/AThis amendment forms a part of MIL -I -81454(AS), dated 15 January 1967, and is app rovedfor use by the Naval Air Systems Command, Department of the
2、Navy and is available for use byall Departments and Agencies of the Department of Defense.PAGE 22.1, Under Specifications, Military: Add:“MIL -PRF -6085 - Lubrication Oil, Aircraft I nstrument, Loss Volatility.MIL -M -7793 - Meter, Time Totalizing. (Inactive for New Design)MIL-C-14806 - Coating, Ref
3、lection Reducing, for Instrument Cover Glassesand Lighting Wedges. (Inactive for New Design)MIL -C -26482 - Connectors, Electric, Circ ular, Miniature, Quick Disconnect,Environment Resisting. (Inactive for New Design)MIL -I -81219 - Indicator, Elapsed Time, Electro -Chemical. (Inactive forNew Design
4、)MIL -PRF -81322 - Grease, Aircraft, General Purpose, Wide Temperature RangeMIL -G -8155 9 - Gyroscope Assemblies, Attitude and Directional ReferenceInstruments for Aircraft Preservation and Packaging,Procedures for. (Inactive for New Design)MIL -B -81744 - Barrier Coating Solution and Solvent“2.1,
5、Under Standard, Military : Delete “MIL - STD -794“ and Title, Add “MIL -STD -1334Barrier Coating Process for Anti -Friction Bearings“ and “MIL -STD -838 Lubrication of MilitaryEquipment“and“MIL -STD -471 Maintainability Demonstration.“AMSC N/A 1 of 11 FSC 6610DISTRIBUTION STATEMENT A . Approved for
6、public release; distribution is unlimited.INACTIVE FOR NEW DESIGN AFTER 09 OCTOBER 1996INCH-POUNDProvided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 32PAGE 3* 3.1: Delete and substitute:“3.1 First article . When specified (see 6.
7、2), a sample shall be subjected to first articleinspection in accordance with 4.3.“PAGE 43.3.2.3: Delete “3500” and subs titute “2000.”Add as new paragraphs:“3.3.2.4 Time totalizing meter . The indicator shall contain a time totalizing meter(4,000 hours) conforming to MIL -M -7793. The reading of th
8、e meter shall not require unsealingof the indicator case. The time totalizer shall be installed within the present envelope of theinstrument.3.3.2.5 Indicator -elapsed time, electro -chemical . This indicator may be used as an alternateand shall conform to MIL -I -81219 within present envelope of th
9、e instrument. The scal e shall befor 5,000 hours.“PAGE 53.3.9.1: Delete and substitute:“3.3.9.1 Vibration. The indicator shall operate satisfactorily when subjected to the vibrationtests of 4.8.18 and 4.8.19.PAGE 8Add as new paragraphs:“3.5.1.2.5 Drum mask . The drum mask is affixed to rotate with t
10、he roll gimbal. Referringto figure 2, the portion of the drum mask above the drum shall be gray color No. 36440 ofFED -STD -595.“Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 33PAGE 103.5.1.7, Last two sentences: Delete and
11、 substitute:“The warning fl ag shall be fluorescent red, color No.38905 of FED -STD -595 and thelettering “off“ shall be black color No. 37038 of FED -STD -595. The fluorescent red flag shall beilluminated under night lighting conditions and the lighting shall not be entirely dependent uponone light
12、 source.“PAGE 113.5.1.10: Add as last sentence:“This device shall not restrict the pitch and roll freedom in the absence of power.“3.5.1.11.3, Last sentence: Delete and substitute:“The erection rate in pitch and roll shall b e not greater than 0.9 degree per minute when thespin axis displacement is
13、greater than 10 degrees in pitch and roll.“3.5.1.12: Delete and substitute:“3.5.1.12 Rotor coast time . The indicator shall display pitch and roll information within 6degrees of vertical for a minimum of 9 minutes after power is removed.“PAGE 12Add as new paragraphs:“3.6.1 Lubrication.3.6.1.1 Rotor
14、bearing lubrication . The gyro spin bearings shall be lubricated with greaseMIL -PRF -81322 or MINIPURE grease or eq uivalent with particle size not greater than 50microns. The requirements of MIL -STD -838 shall be met.3.6.1.2 Bearing lubrication . The lubricating oil used in gimbal bearings shall
15、meet theperformance requirements of MIL-L-6085 except that it shall conform with Naval ResearchLaboratory polyolester lubricant NRL MB -20 -B. Teflon separators shall be used in gimbalbearings.Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-814
16、54(AS)AMENDMENT 343.6.1.3 Barrier film bearing coating . All bearings lubricated in accordance with requirementsof 3.6.1.1 and 3.6.1.2 shall be processed in accordance with MIL -STD -1334. The coatingmaterial shall be in accordance with MIL -B -81744. All bearings shall have chamfered races andshall
17、 be barrier film processed either by a ball bearing manufacturer or a designated Governmentfacility.3.7 Operations . Precessions in pitch and roll with rated power shall be in accordance with3.7.1, 3.7.2, and 3.7.3.3.7.1 Longitudinal acceleration . When subjected to an 8G acceleration for 4 seconds
18、alongthe roll axis, the indicator shall not precess in pitch and roll beyond 2 degrees (see 4.8.9.2.3).3.7.2 Coordinated turns . When subjected to coordinated turns with a turn rate between90 to 1500 degrees per minute and bank angles of 20 to 60 degrees, the indicator shall not precessin pitch and
19、roll beyond 2 degrees maximum (see 4.8.9.2.1 and 4.8.9.2.2).3.7.3 Uncoordinated turns . When subjected to uncoordinated turns (skid turns) of less than5 degrees per minute at air speeds not greater than 400 knots for a 10 minute duration, theindicator shall not process in pitch and roll beyond 2 deg
20、rees maximum.“4.1.1 and 4.2: Delete and substitute:* “4.2 Classification of inspection . The inspection requirements specified herein are classifiedas follows:a. First article inspection (see 4.3)b. Conformance inspection (see 4.4)PAGE 134.2.1, 4.2.2, and 4.2.3: Delete and substitute:* “4.3 First ar
21、ticle inspection . The first article inspection shall consist of the Life test in 4.5and all the tests in 4.8.* 4.3.1 First article samples . First article inspection samples shall consist of 3 samples. Thesamples shall have been previously subjected only to individual inspections.Provided by IHSNot
22、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 35* 4.3.1.1 First article sample identification The first article inspection samples shall be plainlyidentified by durable tags, securely attached, and marked with the following information:Sampl
23、es for First Article Inspection(Name of Equipment)Submitted by (Manufacturers name, date andpart number) for First Article Inspection inaccordance with MIL -I -81454(AS)under authorization (reference letter authorizing tests).”PAGE 144.3, 4.3.1, 4.3.2, 4.3.3, and 4.4: Delete and substitute:“4.4 Conf
24、ormance inspection . The contractor shall furnish all samples and shall beresponsible for performing all tests except sampling plan B tests which will be conducted at agovernment laboratory designated by the procuring activity. Conformance inspection shall consistof the following:(a) Individual test
25、s(b) Sampling plan A tests(c) Sampling plan B tests(d) Reliability assurance tests(e) Special tests”PAGE 154.4.2: Delete and substitute:“4.4.2 Sampling plans . The sampling plans shall consist of sampling plan A and samplingplan B tests. The test samples selected shall first have passed the Individu
26、al test.Quantity Offered Quantity to be Selected forfor Acceptance Sampling Plan A TestsFirst 15 1 (zero when Sampling Plan B is invoked)Next 50 1Each 100of remainder 1”Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 36PAGE 1
27、64.4.2.1: In the title a nd first sentence change “sampling tests“ to read “sampling planA tests.“Add as new paragraphs:“4.4.2.2 Sampling plan B instructions . One sample shall be selected at random from the first15 produced on contract and submitted within ten days after manufacture. These samples
28、shall beforwarded at the contractors expense to a Government laboratory designated by the procuringactivity. Each sample shall be identified by a securely attached durable tag marked with thefollowing information:Indicator Gyro ID -_/ASubmitted by (Manufacturers name, date) forProduction Acceptance
29、Sampling Plan B Inspectionof MIL -I -81454 with Contract No. _Manufacturers Part No. _4.4.2.2.1 Sampling plan B approval . Approval of sampling plan B instruments shall be bythe procuring activity upon satisfactory completion of the designated tests. Any design, materialor performance defect made ev
30、ident during this test shall be corrected by the contractor to thesatisfaction of the procuring activity. Failure of the sample units to pass any of the tests shallcause cessation of deliveries until corrective action is performed.4.4.2.2.2 Sampling plan B inspection . Each sample selected for sampl
31、ing plan B testing shallbe subjected to the following:(a) Sampling Plan A Tests(b) Vibration Failure(c) Radio Noise Interference(d) High Temperature Exposure(e) High Altitude - Low Temperature(f) Temperature Shock(g) Humidity(h) Salt Spray( i) Fungus Resistance(j) Impact Shock(k) Acceleration(1) San
32、d and Dust“Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 37PAGE 174.4.3.1: Delete.4.4.3.2 and 4.4.3.2.1: Delete and substitute:* “4.4.3.2 Reliability production acceptance phase . Reliability production acceptance testingsh
33、all be conducted through a production burn -in. Each equipment produced but not submitted forthe Reliability First Article Test shall be operated for 150 operating hours burn -in, and the testdata (operating hours and failures) shall be compared to the reject criteria of test plan V ofMIL -STD -78 1
34、. (Extend the lines as necessary to accommodate the data omitting the truncationlines). Delivery of equipment shall not be held up to await a decision under the test plan. At anytime that the current total of test hours and test failures plotted on test plan V curves show areject situation, the proc
35、uring activity shall be notified. In the event the total of test hours and testfailures plotted on test plan V lines extended shows an accept situation, the test duration on eachsubsequently produced indicator shall be reduced to 100 operating hours. For the productionacceptance phase, test level F
36、shall be used, except that the temperature extremes shall be +55 Cand -44 C, and vibration shall be 0.5G.“PAGE 194.5, Third sentence: Delete “ Preproduction” and substitute “First Article.“PAGE 214.6, First sentence: Delete “ Preproduction” and substitute “First Article.“PAGE 234.8.7: Add as last se
37、ntence: “The test shall be repeated with power removed.”PAGE 244.8.9.2.1, Second sente nce: Delete and substitute:“The roll and pitch axis shall not change greater than 3.5 degrees in a 4 minute period.“4.8.9.2.2, Last sentence: Delete and substitute:“The roll and pitch indication shall not change g
38、reater than 3.5 degrees in a 4 minute period.“Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 38Add as new paragraph:“4.8.9.2.3 Vertical angle erection . With the roll axis of the indicator oriented along thevertical and the
39、spin axis oriented towards the geographical north, the gyro shall be aligned toindicate 0 degrees in pitch and roll. The roll and pitch indication shall not change greater than 2degrees in a 32 second period.“PAGE 254.8.12: Delete and substitute:“4.8.12 Rotor coast time . The pitch and roll indicati
40、on shall not change greater than 6degrees in a 9 minute period.“4.8.14, First sentence: Delete and substitute:“The indicator shall be connected and subjected to the transient variations specified inMIL -STD -704. No damage shall occur to the indicator. The indicator shall then be tested withthe inpu
41、t voltage and frequency being varied within the following limits and combinations.“PAGE 264.8.18, After second sentence: Add: “Linear motion may be used instead of circularmotion.“PAGE 274.8.19: Delete and substitute:“4.8.19 Vibration failure . The indicator shall be tested in accordance with Part I
42、I, VibrationTest of MIL -T -5422 except the following vibration curve shall be substituted in lieu of Curve IIof figure 2: between 5 Hz and 20 Hz a constant double amplitude of 0.10 inch shall be applied,between 20Hz and 350 Hz a constant 2G vibration shall be applied, between 350 Hz and 2,000Hz a c
43、onstant 5G vibration shall be applied. Power, including power to the lighting circuit, shallbe applied to the unit during the vibration test. Following exposure to vibration the unit shallmeet the individual test requirements.”Provided by IHSNot for ResaleNo reproduction or networking permitted with
44、out license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 39PAGE 28Add as new paragraphs:“4.8.28.1 Operations . Rated power shall be applied to the equipment and precessions inpitch and roll resulting from accelerations shall be limited as stated in 3.7.4.8.28.1.1 Longitudinal accelerations . The equipment
45、shall meet the requirements of 3.7.1.4.8.28.1.2 Coordinated turns . The equipment shall meet the requirements of 3.7.2.4.8.28.1.3 Uncoordinated turns . The equipment shall meet the requirements of 3.7.3.“PAGE 294.8.30, Third sentence: Delete and substitute:“The error in either pitch or roll shall be
46、 not greater than three degrees. The error induced byroll maneuvers at a rate of 300 10 per second shall be not greater than one degree.Furthermore, rotating the indicator in either direction at the above rates shall not cause damage tothe indicator.“Add as new paragraph:“4.8.31 Sand and dust . The
47、indicator shall be subjected to Sand and Dust Tests, Procedure Iof MIL -E -5272. At the end of sand exposure, the indicator shall not be damaged and shall meetthe requirements of the Individual tests.“PAGES 29 and 305.1, 5.2, 5.3, 5.4, and 5.4.1: Delete and substitute:“5.1 Packaging, Packing, Preser
48、vation and Marking . Shall be in accordance withMIL -G -1559.”PAGE 326.2: Delete “6.8 Ordering data ” and substitute “6.2 Ordering data .“Add as 6.2 (f):Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-I-81454(AS)AMENDMENT 310* “(f) When first art
49、icle is required (see 3.1).”* 6.6: Delete.Add as new paragraph:“6.7 Maintainability demonstration . Maintainability demonstration shall be in accordanceMIL -STD -471 except as modified herein. If the demonstration has been performed on a previouscontract or order, it need not be repeated.“Add as new paragraph, but delete “6.8” and substitute “6.2” (see 6.2 above)
