1、MIL-W-4281C 66 W 999770b 0128499 4 W 1 - .- -. - . . .- . -. - .- - MIL-w-E .- -. - - . . . _.- -.I-_. ._ . .- . - _- . , . _. -. I.- . .- _- ,.- _. - ,_- - . : . _.- . - . , . - .- - . ._ . .- I.- - I _- . ._- _._ . -. - . - - _- 9 December 1957 1. SCOPE 1.1 . Tinia specificat?.cn covers the follow
2、ing units ,a.p3,as6eqoly,.Qf oiie. mettorolgical equipment enignsted as Wind Measuring set AN/MMQ-( ) (see !iransmitt.er, Wicd Speed -620( )/M- Indfcator, Wind Speed ID-624( )/GM :bot, Trailer Mounted m-328( )/M Cese, )/MQ- The rlnd measuriag set measures down-wind and crom wlnd camponento of vlnd a
3、l;eed and relative direction. . I: :. - , . . . . - . - . - .- -. . .- _- . -. . - C. .- - . _ ._-. I-_-.- . - _.- . . .- . . . . _ . _- . _- . .-. -.* - -.- . - . - _I_ ,. - ._ .-. .- _- - . _- . .- _. . _- -. - 1.1.1 *_._-_* - . .- C-*.-.- .- - . . . . . .- *_- , . .a. I- Flux Cored Ribbon and Wir
4、e, and Solid Form. Strapping, Flet; Steel. Paper, Wrappin Bleached, Dyed or Gray, Peper, Water Resistent. Water Veperproof , Flexible. Varnish, Moioture and Wgus Eesistant for the “reabent of CosnmiaiCatim8, EkCtraniC fnd AS6OCi8ted Electrical Equfpmut . -._ .- . t;:;I:I:;: I . .- L . - _- f, THIS D
5、0CaiUkN.S CbNTAlNt BA6ES. . .i i I e-. . _I_.-._.-. .“F. . “. i :.-:-.lz!fizi;:=:=: teminal lugs 6hoI.l be tinned, ailver-plated, or lead-slloy coated Electrical connections shall not be made by clamping between metallc end non-metallic teril.-. Fraying of textile ends of ares shall be prevented mee
6、bepicelly or by application KG-.=.; of varnish conforminq to Specification MI,-v-TS. .NO vernsh, acquer, inspection L:XZZZZZ -paint, or other coating shall be applled to completed electrical connections. 3.4.7 Groundin and composition 4562 OF srS63, type AR or S, for special purpases. OF S, sbel be
7、used for general When t-ne s solder ig USlrF-l42!j5, Pw- K- i ?. . - ./ Y, . 5 ._ _._- - -A.- t. j parameters i wind rjpeeda from O to 50 miles per hour. Electzical cherecterstice ehell be as iollom 3.Yt3.1 Linearity.- With the indicator controls eet a6 8pecfisb in 4.10, the crom wind and range wind
8、 meter shall be linearly calbrate euch tbat the metar Indicationa sbll not vary by more tben I1 mile-per-hm frora the following valuer: Table I - Ein (dcl Meter Indica tion (mphl k0.596 I, 192 1.788 “*k 2. 80 10 20 30 40 SO With the indicator c0nt;role set es epeclfied la 4.10, except that the #Cele
9、 relector ewiteheri sh3.1 be in the inner scale position, the metar indications sbiU no*, vary by mor .than 0.5 milea per hour from the followin6 values: Table II .cIiII EM Meter Indication (mph) 0,298 5 0,596 10 0.8% 15 Ll92 20 1.490 25 3.7.3.2 Tim constant.- The time constant of each circuit ebll
10、correspond to the velues Indicated bythe time constant dial to within Il when test smooth and even. thet will affect rapid extension or contrac%ion. the maGt fully shall not exceed 4 minutec. minuteo. (Sec 4.8.1). 3.7.4.5 Oil Provide pressure aEdBPvolume to meet the requirement of 3.7.4.2. One shall
11、 be driven by a 1./3 hp, 24 volt dc motor operating from a vehiculer dc supply* other chill be driven by a l/2 bp, li5+i0$ volt, 60 cycle, single phase BC otm operating from a cornmerclal ac 60WCe or gaeolinerengine-generator rise of the motors shall not exceed rated values during operation. Shall p
12、rovide the above-stated power throughout erection of the mast and shall be mpable of meeting the tests of 4.8.1. There ehall be no pOhtt3 Of friction The time requized to exbend Retraction time shall not exceed 3 s.- The oil pumps (me each Por ac and dc systems) shall Th The temperature Both motors
13、3.8 Service conditions.- The equipment shall meet the following service cOn2itionn: 3.8.1 Operetion.- conditions specified in 6 hours off and xith no Continuous use for a perio of 3 years under worldwide 3.8.2 through 3.8.5 with a duty cycle of 6 hours on a more %han normel maintenance and replaceme
14、nt of parto. Where the contractor has to maire a selection of ports, materiala, processes, construction methods, etc., he shall be guided by this requirement Approval of the preproduction somple (see 3.l), shell be considered LIS compliance with this requirement. 3.8.2 Temperature (see 4.13).- (a) O
15、perating.- Ambient temperature in the range of +15OoF to -65OF. (The 150F temperature includes effect of sun-losd.) temperoture extreme not to exceed 4 hours, and, et the low temperature extreme, not to exceed 72 hours at acy one the. at the high temperature extreme not to exceed 4 hours, end at the
16、bw temperature extrem not to exceed 24 houre, et any one timed Exposuse at the high (b) 14onoperatinG.- Exposure ir. the range of 1600F to -80F. Exposure 3.8.3 Relative humidity (see 4.14),- up to 97 percent relatfve humidit;. for 20 hours; and exposure at 10 percenb relative humidity, with condensa
17、tion, for 4 hours. 3.8.4 Elevation (see b.il).- (a) Operatin.- The contractor rthall submit for 6pprOVa1, t0 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-W-3281C bb 77777Ob
18、 0328509 3 W - . ,. MIL-W-UC ( sig ) . . C*-. 3.11 Finich.- The equipment shall be finished in accordence with , . - . “1. I -._- Specification .IIL-F-lLICYiS and the equipment drawings. (See 4.4) 3.12 Marking.- 3 . 12.1 General. - Msrking shell conform to Specification MIL-M-13231. . _- - _-.- . -
19、-I_- E:.- b- Front L panel roarking shall be group I. - 1:- ._ - . . -.- .- -.- . 3.12.2 Visibility.- Wherever pFacticeble, .parts and assemblies shall be so mounted that the4r identification markings will be readily visible-with min* . - -.-_- .- disessembly o? Lhe equipment. _- 3.L2.3 Serial nuoUe
20、r6.- The folloving units shall be serial numbered: Wind Meaeuring set m/m*Q-l indicator, Wind Speed fD-624( )/GM *anmitter, .Wind Speed -6io( )/-1 E- Mest kB-329( )/C . _._ _ . . . - .-. _L_-_- _ . . - . . - _, *.- I I - ._- I - 15;- I E.: - . . 3.13 Suppression of radio interference.- The equipment
21、 shall meet the emanstion 8nd susceptibility limits of Specification 1-i.1748 for Class 111. 1: .-. . - .-.-.-.: . Application of suppression components end techniques shell conform to that specification. proper In order to facilitate conformance with the specified emanation and succeptlbiity limits
22、, he shll obtain approval from the contracting officer before proceeding with the modification. f the contractor considers it desirable to modify the equipment 3.14 PreconditioninR.- The indicator and Kind speed transmitter shell be cepable of meeting the inspection of section 4, without subsequent
23、processing, after subjec%ion to the bounce preconditioning of 4.6. 3.15 Technical literature, tools and running spare parts.- Technical literature tools, end running spare perts shall be furnished as specified in the contract. Ruoqing spare perts shall be identical to corresponding parts in the item
24、s furnished on the arder. (See 64 an8 h.) 3.16 WorkmanshiE.- The item shell be manufactured and assembled in 3.4 Wiring end Cabling. 3.5. 3 Process for SIderhR. eccordnnce with the applicable portions of the following paragrspha herein: 3.11.1 Clearance in wiring and cabling. 3.4.5 Splicing of uires
25、. 3.4 . 6 . Connections. 3.4.7 Grounding. 3.4.8 Shielding on wire and cable. . 3.5.2 Acid and acid salts. 3.3 . Construction. 3 . 10 Wopica liza tian . Il E!-.Y . . . - . - t=- ._.-.- ._ _- - . -_. - i . . . -. . - _- . - I- . - . . - - - . - . _- .I - . . Copyright Communications - Electronics Comm
26、and Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-, MIL-W-LZBLBC 66 = 7777906 OL285LO T H 2 Acceptance inspection of Preparetion for delivery. (Set. 4.21) . I- LS, Preproduction Inspecttan.- Thie Inspection Will be pez!for?a
27、ed by tho Ssvermacnt-imlesa otherwise specified in the contrect. S*epr other preprouotfon inspection my pxedu, fo?.lair, dr be interspersed between the foregolng. It shall canslet of the respectively). The prcproductloa (LI vfbreth, (2) bounce, Table N. - Preproduction i.nspecti.oli I . 4.1 Contraet
28、or respgnsibi$-bg.- Unless okherwise specified herein, the latpplier fs responsible for the performance of al1 Inspection repuirenenttr prim spwifisd, the supplier mep utilize Lis own facilfties or eny canraercisl laboretotj acgeptable to .the Gotrernment. Inspection records of the emyinatione and i
29、onal rigidity 3.3.5.1 4.8.6 ) rb Gt A 1igtMIent 3.3.5.2 408.5 ) 3.3.5.3 4.8.7 ) 1.5dphu 6.5dphu 3.7.4.3 4.8.3 ) Mil Scale fkight Stability Torque 3.7.4.1 4.8.2 ) C. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permi
30、tted without license from IHS-,-,-;-128buen% lot8 o not conteln the enme defect r defects* Table VI - Group B inspection Inepection Req Inap A% - Per Par Troncmitter, Wln Speed, T-610( /M$Q-l Torque, starting 3.7.2.3 4.9.3 Torque, stopping 3.7.2.4 4.9*4 ) Vene, etatc balance 3.7.2.5 4.9.6 ) Televane
31、 shaft bearing friction 3.7.2.6 4*9*5 1 Xnterchangeability (overel11 3.2 4.19 . 6.596 4.503 Ormp C inspection.- This inspection shall be es leted In feblc VIT, end shall normally be performed on sample units that have been eubJected to end met map A and group B inepection. Table VI1 - Group C inspec
32、tion TnspecMon Req Imp Per Per Suppreesion 3.13 4.20 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-w-I.LLanco+vcicn, Eiew York, or equal. The paclroge tester, nbofts in phas
33、e, shall have 8 speed such timt It io duet poesibk to insert a 1/32-fnch-thick strip of moterial under one corner or edge of the unit to a distance of 3 Inches as the unit bounces, me unit shall be subjected to this preconditioning for 1 miaute. p+econditioning, the unit shall not be repaired, ellne
34、d, cleaned, or otherwise ebnged prior to subjection to procurement inspection. After bance - Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-4.7 Vieual end mechanical inspectlo+-
35、Tbe equipment shell be examined for the defects Zioted Xn Standerd MIL-STD-25% and Table VIII. Table VI11 - Classification of Visuel and MechanlcsX Defectb - Cla esif icotion kf ect Ma dor Ineff ective connections (electrical) Ineffective connections (physical strength) Use of riveting for mounting
36、capacitors, rcsetora, Loose or defective rivets or other securing parto. Missing, broken, Inoperative or defective parts of Damaged or inaccurote peep sighte, levels, or mil Demged or inoperative mast section. Damaged, missing parte, or out of belence of tranoformerc, inductors or minieture tube 80c
37、keto. oil. pup assemblies, pipe or valve eyeteme, scele. Transmitter, Wind Speed -610( )/EoIs;1-l including Impellers, teil vane, connector housing and connections. Imgioperly applied or poorly fitting gaskets for cover B . Improper or poorly mounted hardttare, including catches on cases. Trailer no
38、t undercoated. Dented gasoline c8ns Minor Sharp points, rough surfaceo on soldered Jointe. Exceso of flux end corrosive material, or lack of Poor screwtheads, washera not properly seated. $of% or brittle materiale subject to corrosion Poor, inadequate, or improperly applied fnishes, Poor undercoatin
39、g on trailer. 4.8 met -328( u.- Mast *328( )/M which coneiets of Mest AE-329( )/o cleaning and renoval of loose particles. through lack of protective coatinge. end j.tG occeaaoriej mounted In a trailer shall be tested 85 indicated bclow. laot AB-329( )/G can be teated 88 a separate item ueinq the 80
40、mc teat procedure except for tht concerned wlth the trailer and power unit it suihble mounting fecilities and a source of power ore provided, 16 Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license
41、 from IHS-,-,-MIL-U-LEBLC 66 9999906 0328535 7 , - . - ,.- . . 1,- il - - /- CI i b.8-3 Mil scale.- The mil scale shall be checked for lunCtiQninl3 of the locking device. (See 3.7.4.3). 4.9 Wind Speed Transmitter T-6101 -)/w -1.- - = :-% I Copyright Communications - Electronics Command Provided by I
42、HS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-h09.1 Generator output.- Connect e potentiometer across the gcnerotor output c%h t0 provide o WjO oisni load. c%Ctj.On et the speed3 indicetcd in 3.7.2.1. S;?ldiiOnOU8 motor or similar device
43、 coupled to the impeller shaft moy be used to outuin the required speeds. with the output requireiacnts of 3.7.2.1. l+.30S Sine-cosine output. I easurements to determine compliance with 3.70202 Shl le made at a conctant Ecnerator shaft speed of lO3l rpm (50 qh) or by ag.plSnS Q tic potential of 5.95
44、 f I. volts to the slip ringe (top-positive, bottom-negative) after properly zeroing and phasing of the oine-cosine potentiometer. The ecperetc voltace6 of the sine (B-C!). and cosine (A-B) sections shall be meamred st each 15 dcsrce increment through 360 degrees rotation of the trensmitter. ThiB te
45、st Shall be conducted with the transmitter (less impeller) mounted In en appreved test f IXtUrC with “zero“ pofsition as defined in 3.7.2.2. cale-phte graduotcd at 15 degree intervals. (see Figure I) to the impeller shoft in a counter-clockwise direction (viemd ficm the impeller end or front). the a
46、pplied torque. to th? impeller shaft in a counter-clockwise direction as in 4.9.3, shaft in the counter-clockwise direction by a momentary additional torque. etarted, the shoft shall continue to rotate so long as the 0.45 inch-ounces torque 10 opplied. Rotate the inpeller shsft in a counter-clockvlB
47、 A georcd heed, multi-spindle t.?easurcmcnts shall be made to determine Coropliencc The test fixture ehall have an crzimuth h.9.3 Tor,que test, fitortinge- Apply a constant torque of 0.70 lnch-ounce8 The sboft shall start and continue rotating duc to 4,g.b Torque test, stopping.- Apply a constant to
48、rque of 0.45 inch-ounces Start the When 4.905 Vane sheft bearing friction.- Attach a piece of twine to the trenmitter rain ohleld kith a Diece of messure-sensitive tape. Wind the twine onto the rain shield omoothly, hihout ovbpplng, by rotatlagthe vaner tho twine over tj frictionless pulley (see Figure 2). end OP the twne to apply 3.60 inch-ounces of torque to the vaner rotate o long as the torque is applied. Rotate L
