tm 9-657 m8 director trainer

8/13/2019 Tm 9-657 m8 Director Trainer

1/90

ICALMANUAL

VEMBER1943

Publ

icDomain,Google-digitized

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athitrust.org/access_

use#pd-google


2/90

NICALMANUAL

persedesTM9-657,dated20January I943.

PublicDomain,Google-digitized

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use#pd-google


3/90

vember1943

M8,ispublishedfor theinformation

ned.

TARYOFWAR:

(2);I Bn44(2).

ls;seeFM21-6.)


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4/90

upersedesTM9-657,dated20January194}.

.............1-24

.....................354-6

-116-22

ements........12-1422-57

.15-1757-64

.....................18-2064-70

ptomsof

1-79

........................2479-87

25-2788


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for theinformationandguidanceof

.

ionoftheDirectorTrainerM8,this

linformationrequiredfortheidentification,

el.

y,andsuchrepairsasmaybehandledby

beundertakenonlyunderthe supervisionof

mechanic.

atureoftherepair,modification,or

copeorfacilitiesof theunit,theresponsible

einformedsothattrainedpersonnelwith

entmaybeprovided,orproper instructions

N.

consistsof threemainparts:thesound

ndthetarget.

s equippedwitheightremovableair-

maybeused inconjunctionwiththe

ghavailable,isnotfurnishedasa partof

onsistsofa cabinetfortherecordchanger,


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ismwhichproducesthesimulated40-mmgun

rium-typeloudspeakers.

imensiontotheDirectorsMS, M5A1,

eitheroftwohandwheelsonoppositeends.

r"dry"runs,andthe otherisformoread-

eadjustmentchartsfurnishedrepresent

markedoneachchart.

representationofmovingclouds,asetof

anairplane.

s usedtotrainrangesetters forthe

the 40-mmantiaircraftgun.Theapparatus

heselectionandtraining ofnewrangesetters.

experiencedrangesetterrefreshedonthe

ndwheelso thathisrangeadjustmentswill

dsubconsciously,thusinsuringeffectiveanti-

procuredforuse inconjunctionwiththe

dto traintherangesetterto estimateranges

dditiontothe above.Therangesettersees

ervedsizeandapparentchangeofobserved

hingleg,midpoint,andrecedingleg.

tion10

rts11

will bedeliveredinfivecrates.Each

ollowing:director,directortarget,director

rchartsandsound.

undunits areremovedfromthecrate,it

etwoboltsholding thesoundunittothe


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our boltsholdingthesoundunitsupports to

andthesoundunit. Thesoundunitsupports

the frontfaceofthecontrolunit bymeans

Twoboltsare looselymountedintheupper

pportssothatthehookson thesoundunitmay

ngendsof thescrews.Nutsarethen

o clampthesoundunitsupportsfirmlyin

esoundunit isthenpluggedintothe right-

e rightsideofthe mainswitch.Packing

oducingarm,andtheendof thepowerinput

rage compartment,shouldthenberemoved.

d therecordchangermechanismduring

smustberemovedsothat thechangerfloats

g.If theturntablehasbeenpackedsepa-

ytoplaceitoverthecenterspindleand gently

hatthe motoridlerwheelisnot damaged,

rntableproperlyengagesthedrivepin.

et,whenremovedfromtheir crates,are

eir respectivesupportingmembers.The

fthreelegs,whichareattachedto theunder

ansofninecapscrewswithshakeprooflock

tetheattachmentoftheselegs, itisde-

naninvertedposition.Usecarenot toinjure

thedirector.Thelegsarereinforcedby

hichareheldinpositionby threecapscrews,

shersandhexagonalnuts.Whenthelegsare

torupright.Use carenottothrowundue

sof theunitwhenturningit over.Attach

arofdirector.A screwandwashersare

e.Screwthepinionreleaseleverhandlein

vicedooron therightsideof thedirector

gthumbscrews(fig.15).Insert a7-watt

cketsinsidetherangedial,andin thesocketin

ecabinet.Removetheblockseparatingthe

-shot"electromagnets,(fig.20).

o theleft-handoutletonthelower

it(figs.1and 10).Thedirectorissetso that

dial,firingswitch,andrange settinghand-

ontrolunitcabinet,andcenteredon it.The

rrangedsothatthesoundunit tendstoover-

ancebetweenthefrontofthe controlunit

r shouldbesuchthatal inedroppedfrom

verheadsoundunit isapproximately18

edirectorcabinet.This willcausethestu-


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RARMSWITCHCONTROLKNOB

09M

er TopView

directlyundertheexplosionsoundunitwhen

ionforoperatingtherangesettingdirector

eoftwochannel-ironendframestied

barson eachside.Thesebarsareplacedin

ower tiebarswithcrossbraces.Theunit

rewsequippedwith shakeproofwashersand

tbaseshouldbeplacedabout15 to25feet

dinlinewiththe directorandcontrolunit

dsothat thelongdimensionisin linewith

t

he viewingareashowingtheairplane

hedirectorand centeredonthedirector.The

eatoppositecornerswithtwocap screws.

sshippedseparatelymustbe mountedin

eoverheaddrivepulley(fig.34). Loosen

yshaftcoupling,sliptheairplanesupportwire

irplanewingsshould besetroughlyat70

targetcabinet.Connecttheleadwiretothe

thepulleysupport,at therightofthe pulley.

s thenpluggedintotheoutlet ontheunder


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erM8 LeftSideView


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E.

embledasdirectedin paragraph6,the

nin figure1,showingaschematicoutlineof

eequipmentshouldbe inspectedtobe

ehas beendonetoitin shipping,suchas

akingofparts,etc.Thehandwheelofthe

besurethatit turnsfreely.Thetargetshould

atinadditiontohavingno looseparts,the

eesetsof rotatinglightsfor"shorts,""hits,"

tefreelywithoutstrikinganyofthe support-

eterminedbyreachingthroughthe view-

achlightindividuallybyhand.Torotate,

gnetarmatureintheenergizedposition.If

workatany pointintheirpaths,adjust the

otoccur.

will befoundpackedinthestoragecab-

houldbeplacedin positionreadyfor

er.

hetrialofthe equipment,thebattle

Itisdesirableto becomefamiliarwiththe

ratingthereproducingequipmentforprovid-

hangerplaysup tofourteen10-inchorten

ding.Figure2showsthe settingfora10-inch

ngarmsareboth turnedtowardthecenter

msare setforthesamesize records.Place

sizeindicatedonthearmsoverthe centerpin

eselectingarms.Thereproducershouldthen

singlerecordistobe used,asisintended

the battlesound,thesinglerecordis placed

dbethe caseforloadingseveralrecordsin

enreadyforoperation.To producethe

erinputlead intoaconvenient110-v,60-

the mainswitchlocatedonthecontrol

rdchangerswitchknobtothe "REJECT"or

Themotorwillstart.Therecordchanger

ation.Ifat anytime,itis desiredtostop

nt,movetheswitchknobonthechangertothe

OFF"position.Thiscanbe doneatany

esincontactwiththe record.Therepro-

operateifthe mainswitchontheoutsideof

inthe"ON"position.

eturntablecontrolknobinthemanual

mis movedmanually.Failuretodothiswill

nism.


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kelitesheet,with metalmountings,are

ainer-typecrate.SelectchartNo.1,for

Placethechartinthedirectorthroughthe

abinet(fig.3 ).Todothis, releasethepinion

gthe handlevertotheleft, andholdingitin

hechart carriageoutward,bymeansofthe

hatextendsthroughthe slotSlidethechart

facetowardthe left,andwiththemetal

,on thebottom.Slidethechartin untilit

er endofthecarriage;thenlift thebolton

dethechartslightly outwardtopermiten-

ediatelybelowit;releasethebolt, allowing

on.

htsideofthe directortotheopen

vablelobesonthe timingdiskasshownon

elobeson thelefthalfofthe disk,as

ter'spositionbehindthe director,shouldbe

sition.Ifanyaremoved,eithertoward

ripheryof thedisk,theyshouldbemoved

slotsbyhand.Itis notimportantthat

ofthedisk, asviewedfromtherangeset-

ecentrallylocated.Thelobesonthe right

n.

ent,theslidesin whichthemovable

bricatedwithOIL,engine,SAE30,for all

F,andOIL,engine,SAE10,fortemperatures

ubricatethebearingsofthegearreducer,

.

hes(fig.4)to besurethatall arein

lincludethemainswitch,thegun and

onthecontrolcabinet,also thefiring

directorlight switchesonthedirector

heassemblyof thevariousunitshas

ttheinputleadtoasourceof 110-v,60-cycle

switchonthe controlunittothe"ON"

tand directorlightswitcheslocatedon

rcabinet.Thetargetlightswitchshould

ercornerofthetargetcabinetto lightThe

usetheilluminationof therangesetter's

ectorcabinet,andthechartonthe frontof

ughtheinstructor'swindow(figs.7 and9).


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ymeansofthe rangesettinghandwheelto

ring switchtothe"ON"position(fig.5).

nthe"ON"position,theimpulseofthe

eable,butwithoutthemuzzle blastThe

e directorcabinetbythegearmechanism

swill appearinthetarget,passingeither

nd theairplane.Initially,severalclicks

lbenoticeablebeforeanytracer indica-

automatictimedelayarrangementincor-

nitialtime delayhasbeenarbitrarily

rts.Withtheinitial rangesetatapproxi-

chartNo.1,severalshort-shotswill bein-

ngin frontoftheairplanebeforehit-shots

pearanceofoneortwo hit-shots,theair-

enoughsothat thesucceedingindications

airplane passesthemidpointandmakes

eg,at whichtimetherewillbeindications

ots,asthetargetpasses outofthefieldof

ndicatedbythecentraltracer,which

thelightin thetracerwillbeextinguished

ne,anda lightintheairplanewill be

icateahit.In thecaseofashort-shot,and

dicatorlampwillremainlightedthroughout

oftheslant rangeofanairplanefly-

donastraightcourseat aconstantaltitude

heinitial range,thatweareconcerned

dpointslantr angeis602yards.The

efieldoffire atapproximately1,650yards.

operatingtheDirectorM5 movesso

e targetairplaneimmediatelyinfrontof

rectorTrainerM8hasbeensetup witha

ne ofvisionoftherangesetter. The

otate.Inorder togivetherangesetterthe

ent,thetargetairplaneinthe traineris

pport.Initiallyonthe incomingleg,the

pproximately70degreestotherangeset-

midpointorslantrange of602yards,the

erpendicularwiththe rangesetter'slineof

ressesonthe recedingleg,itturnsso that

esetter.Theairplaneis setataslight

setoproducetheillusion ofaltitude.

omplishmentofapreliminaryrun

,snapthefiringswitchtothe "OFF"posi-


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erControl


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arepeatrun.Toreset thechart,move

tendingoutof thedirectorcabinetonthe

thecabinet,andpullthechartout until

nsofthechainattachedtotheslide (fig.13).

sbefore,atapproximately1,000yards,

to the"ON"positiononthecontrolcabinet,

witchonthedirectortothe "ON"position.

chshotshouldbeaccompaniedbythesound

,above,utilizingthebattlesoundto be

correctly.Toproducethebattlesound,

ntable.With themainswitchonthecon-

"ON"position,movetheturntablecontrol

hensnapthe battlesoundswitchtothe

oundswitchcontrolsashunt,whichin

tthetonearmpick upcartridgesothat

diblyreproduced.Itisthereforepossible

erturntablerunningwiththe recordinplace.

be cutinandout ofthesystemasdesired,

eredinstartingtheturntable.Withthe

hd,above,andthebattlesoundcut intothe

ipmentshouldbeinoperation,producinga

muzzleblastindicativeof60 shotsper

imentofappropriatebattlesounds.Allof

entratedontherangesetter,hencewill not

onestandingalongsidethe equipment

erecordchangercontrolknobinthe

tonearmis movedmanually.Failureto

armmechanism.

maybemodifiedbythevolumeknob

binetpanel(fig.4).

RUCTION.

aceonthesidewhichis seenthrough

videdintothreesections.Thecurved

the chartconstitutesthegraphofthe

whichis thetargetthatis beingstudied

nairplanegoing60 yardspersecondat

antaltitude.Theinitialslantrangeis 1,710

rangeis602 yardsandtherecedingslant

ards.Thecurvedpathtakenbythe graph

ntrange.It doesnotindicateadivingpath

hechart,isachannel-likesection,which


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wingWindow FrontView


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LINE

SION

fthetime requiredforthebulletto pass

ntothetarget.Thetime varieswiththe

tedonthe reverseside,passesacrossthe

n thecaseofchartNo.1 isapproxi-

ginningpoint,and IVzsecondsatthe

ane.Thechannelonthe backofthe

atingmechanisminthetargetto indicate

atsomeperiod between1Viand3seconds

ustment.Othercharts,withotherairplane

withatime channelcorrespondinglydif-

handwheel,aslidingelectriccontact

everticalscrew,whichisjustinside the

ixedcontactislocatedatthe topandat

esecontactsmakeelectricalcontactwith

sof themetalplateonthe chart.Asthe

andlowered,itmakesaconnectionthrough

the uppercontactforindicatingover-shots,

catingshort-shotsatthe target.When

hehitting area,whichconstitutesthe

betweentheupperand lowermetalplates,

etarget

typecanbe viewedbymovingthe

ositionandholdingthepinion releasehandle

t,forward,ortotheleft,so thatthepinion


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whichcarriesthe chartintothedirector.

sitionandsetthemovablecontactsothat

owerportionof themetalchart.Snapthe

sition.Aslong asthepinionis not

k,thechartwill remainstationary,permit-

ppearinthe target.Whensufficientshort-

demonstratetheirappearance,themovable

tothe hittingareaandthesameprocedure

blecontactmayberaisedtotheupper

atethe appearanceoftheover-shots.It

be setinthedirectorsufficientlytoengage

ybeseenthroughthelowerleft-handpor-

.Themicro-switchinthatposition,is

time-delay.InthecaseofchartNo.1,

3secondsif thechartispermittedto

ackand pinionequipment.Ifthechartis

the directorcabinetandmakecontact

e noindicationofanykindoftracer

wayto besurethata tracerstreamwill

tonlypartwayouttowardthe stop.

allydesiredfor gunsutilizingremote

8. Throughtheviewingwindowinthe

ningthrougha course,attentioncanbe

e movablecontactwithreferencetothe

sitionsasthe chartprogressesintothe

chartintheextendedpositionbyreleas-

thechartoutbymeansof thechartcar-

dryrunhandwheelsothatthe movable

eloweredgeof thehittingarea.Snapthe

sition.Asthe chartprogresses,themov-

hittingarea.Immediatelythisoccurs,

tbyturningthehandwheelcounterclock-

tely1inchbelowthehittingareain the

hart.Allowitto remainthereuntilthe

ghagaintomakea contactinthehitting

ionsuntilthemidpointis reached.The

elowestpoint inthecurveofthe hitting

emainstationaryuntilthechart pro-

hecontactfallsintotheshort-shotarea.At

sethecontactuntilit isabout1inch above

reacurve.Allowthechartto progress

thehittingarea,atwhichtimer aiseit

habovethetopofthe hittingarea.Repeat

nehas passedoutofthefield offire.


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REW(6I

gInitialRange

atadjustmentsofthehandwheelon

sameoneitherend,andthey,in turn,are

edforthesameadjustmentin slantrange

DINSTRUCTION.

ionshouldbecarriedonbyoperating

lrangesetter'sposition atthebackofthe

eon therangedialat 1,500yards.On

hit-shot,immediatecorrectionshouldbe

ncetheoperatorisnot watchingtheposi-

sometime-delaybetweentheactualfiring

tionatthetarget.Thereforewhenacor-

cationofahitin thetarget,theremayhave

d,whichwilllaterbeindicatedasover-shots

airplaneareparallelwiththerange

airplaneisinthe vicinityoftheminimum

orseveralhitsatthis pointiftheadjustment

newillthen proceedtopassoutofthe

gslantrange,itis necessaryforfurther

heeltobemadeclockwise,ratherthancoun-


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L

E

CLE

oundUnit


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LANECHARTS.

ryingtypesofflightsand airplane

ewith thedirectortrainer(fig.28).While

nitialworkdoneonthe slowercourses,

dbegivenwithvariedcoursestodevelop

eedofanytarget. Duetothetime-delay

ofthe directortrainerequipment,itis

nlessoperatinginaccordancewiththe

tream.Anattempttomemorizewhatis

etweenthe turningofthehandwheeland

undsforaparticularchartwill notproduce

chamemorizedoperationwillonlybe

ngpointisidenticalwiththe originalstart-

curregularly.

ouldbeable tomakeareasonable

rtslippedintopositionwithouthisprevious

fhitsbeinglimitedby thespeedofthe

gesetter's abilitytoestimatethe

rectorTrainer M8maybeusedin con-

ner.Thiswill combinethestudent's

ange,as wellasrangeadjustment.

ELEMENTS

ent12

DEQUIPMENT.

quipment(fig.10),consistsof two

binetandthesound unitcabinet.The

ntedona woodenbaseconsistingoftwo

meansoffour carriagebolts.Thesebase

barstohold thesoundcabinetandcontrol

ipment.Whenthesoundcabinetisre-

hetwo boltsthroughtheextendedendsof

membersare pivotedonthecentralbolt

ntrolcabinetandtheendsimmediately

dtogetherbeneaththe centerofthecab-


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ELEMENTS

ithPanelsRemoved RightSideView


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netWithTopRemoved

trainingequipmentisassembled.Thisis

gwilloperateunlessit isturnedtothe

owever,switchesfortheindividualcontrol

equipment.Tothe leftofthemainswitch

olthesoundusedtosimulatethe gunblast.

itchisa toggleswitchusedtocontrolthe

ainswitchandtothe leftisafuse which

eeventof ashortcircuitinthe system.

sapilot lighttoindicatewhetherornot the

position.Belowthemainswitchandto

olthevolumeofthe battlesound.Atthe

etwopolarizedoutlets.Theoneon the

the plugfromthesoundcabinet.Theleft

etheplugfromthe director..Atthebottom

doorwhichopensintoastoragecompart-

cordattachedtothemaina-cterminals

handsectionofthecabinet.Anyrequired

tmaybewithdrawnin ordertoconnectit

ower.Atther ightisasmall storagecom-

eneaththeshelfon whichthecordis

rovidedforthestorageof thesparespeaker

aker.


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ELEMENTS

erM8 RightSide


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videdinto fourmajorsectionsas

dicateshowthe cabinetwouldappearif

ontrolpanelismounted,wasremoved.The

desaspaceforanautomaticrecordchanger.

olmechanismisalsolocatedthere.Imme-

playingcompartmentistheequipmentfor

t.Inthe compartmentbelowthatisthe

choperatesinconjunctionwiththerecord

plifyingequipmentisthestoragecompart-

d.

positionoftherecordplayer,turntable,

rencetothecontrol.Recordsareplaced

playingarm israisedandto therightof

armsare setforthecorrectrecordsize.

chonthe right-handsideofthecabinet

on,theplayermaybe putinoperationby

thedirectionindicatedfor start,thatis,

net,oras viewedfromthesideofthe cab-

witchesaremounted,bymovingthe lever

erwilloperatecontinuouslyuntilstopped

chtothe "OFF"position,orbystoppingit

ontrolratherthanwiththe mainswitch.To

switchknobtowardtheposition marked

g.6).Themechanismwillautomat-

wayfrom therecordandcarryitto the

tableinthe controlunitoperatesat75

dcanbeusedfor playingstandardrecords

thespecialbattlesoundrecords.

edinproducingtheexplosionsoundis

ulatedexplosionsoundis producedby

calcurrentthrougha12-microfaradcon-

upledwithamusicwirespring, operatesin

enserdischargetoproduceamorelifelike

tedinthe compartmentimmediately

softhe usual6-tubetype.Thetypeof

ninfigure13.Theonly volumecontrol

s thevolumecontrolmountedonthecon-

fthecabinet.Themainswitchonthe

tionsasa meansofstartingandstopping

er.Theamplifierunit isintendedonly

clea-ccircuit.


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LEMENTS


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ingcompartmentisobtainedthrough

ntrolcabinet(fig.4).

ousestwo auditorium-typespeakers

yingthespeakerfieldcoils(fig.14).

ingequipmentisconnectedwiththe

rizontalsectionofthe soundcabinet.Itis

rews,whichconnectittosupportsattached

nt ofthecabinet.Aspeakerismounted

e cabinetforuseinconjunctionwiththe

peakersarenotinterchangeableanddo

internalmechanisms.

on threelegssimulatingtheappear-

the40-mmgun(fig.15).A handwheel

heuseoftherange setterarelocatedon

ddition,there isaswitch,whichcontrols

ormechanismandwhichisdesignatedas

5).Theswitchisso designated,since

nstructsthegun crewwhentocommence

of givinganoralcommand,hesnapsthe

abinetarelocatedtwoswitches:onefor

sdialand theinteriorofthefront endof

ntrollingtheilluminationin thetarget(fig.

edintheleftcabinetwall,in frontofthe

vementoftherangeadjustmentchart.In

rtextendsout ofthecabinetseveralinches,

wardon thecourseoftheplane,it passes

et.Betweentheswitchesandtheopening

rizontalslotinwhicha leverhandleis

hartpiniongearfromthe rackthatcarries

Whenthis handleverismovedtoward

e pinionisdisengagedfromtherackand

rtismountedmaybereadilypulledto its

p,by meansofachainattachedtothe

risequippedwithawindowwhich

hepositionofthemovablecontact,which

etracerstreamin thetarget(fig.7).By

emovablecontactwithreferencetothe

theslant rangeoftheplanebeingcon-

etermineimmediatelywhattypeofindica-

getatsomefuturetime, duetothetime-


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LEMENTS


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DriverMechanism

oratedinthedirector.Thismakesitpossible

e newstudent,bylookingthroughthe

sshouldbemade,andalsopermitsthein-

dentwhenhe isoperatingthedirector

tthe back.Ahandwheelhasbeenpro-

rectorsothatadjustmentofthe movable

eitherendof thebox.Thetwohandles

hatanychangeinthe positionofeitherone

ngeadjustment,whichin turnisidentical

mentproducedinthe DirectorMSbythe

ofthehandwheeL

fthedirectordo nothaveanyop-

hem(fig.15).The purposeofthisdevice

.Itis assumedthehorizontalandvertical

y othermeans;therefore,neitherthehand-

he horizontalandverticaltrackersarein-

quite simple(figs.16and1?).It

otor-drivenunit,whichtimestheelectrical

muzzleblastor thefiringofoneshot per

adjuststhetimeofactuationoftheswitch


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LEMENTS

AIN

5

H

witchActuatingMember

sthetracerindicationsin thetarget.There

ra tracerbulletwithreferencetoa target,

s;theyareshort-,hit-, orover-shots,depend-

slantrangesetting.Provisionhasbeen

justanelectricalcontact,bymeansof the

sothatitwill cooperatewitha"course-

echanism,causingeitherahit-shot,short-

icatedin thetargetdependinguponthe

planewithreferenceto thesimulatedslant

alon thebackofthedirector carries

eon theDirectorM5(fig.9). Thenota-

ngsurroundingamovablediskonwhich

ked.Theindicatordiskismountedonthe

rivenbymeansofa 0.005-inchdiameter

dto thehandwheelshaft.Inordertobe

diskiscorrect,chart No.1shouldbein-

roperationonthedirector.Be surethe

rikesthe stopwhiletherackpinion is

ehandlever.Using thehandwheelonthe

theslidingcontactuntilit isinthe middle

hart.Withthisadjustment,thedial should


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LEMENTS


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chanicalsoundareavoided.Theimpulse

.

sbroughtinto thelowersectionofthe

foradjustingthemechanismtoindicateshort-

gized.Theshort-shotelectromagnetis

iatelybelowtheover-shotelectromagnet

etsareidentical.Theyareratedtode-

110-v,60-cycle,a-ccircuit.Eachelectro-

ursprings,whichare connectedbetweenfour

netbaseandasheetmetal frame(fig.22).

tedbymeansoftworound-headmachine

ottedholesinthe frame,andthreadedinto

unitissupported.Connectionbetweenthe

tioningleveris madebymeansofacon-

itchissnappedtothe "ON"position,

rreducingmechanismisstartedin motion

rotatesahorizontaltimingcontrolwheel

thechartcarriagewhichcarriesthe direc-

tof themovableelectricalcontract.The

heelisprovidedwith10 projectionsonthe

theimpulseswitchmountedtowardthe

edirector,onthe planeofthetimingdisk.

e controlwheelissuchthatthe actuation

eansof theprojectionsisonceasecond.

stheidlerelectromagnet,previously

epersecond,andsimultaneouslyenergizes

emuzzleblastsimulation,in theeventthat

e controlcabinetisinthe "ON"position.

atedcontrolwheelisprovidedwith10

catedslidingrodsapproximatelyVzinch

ch inlength(fig.24).Thesliding rods

edto actuateswitchescontrollingthemove-

rsin thetarget.Thesemovablecylinders

metricallyoppositeradialslots,whichact

intheslotsin thetimingdisk.Thereis

olwheelslot.Thenormalposition forthe

lobeonthewheelismidwaybetweenthe

slots. Asthecontrolwheelrotates,a

mediatelybehindthebracketsupporting

m,actstolocatethelobesin thisposition.

duringtherotation ofthecontrolwheel

overtheleversattachedto thelobeset-


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LEMENTS


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LEMENTS

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lytoTimingDisk

EWSWITH

TS(2REQ.)

SEDAS

CHES

witchMounting

erearcenterofthe director.Herethey

ewiththehandwheeladjustmentoftherange

tionofa short-shot,ahit-shot,oranover-

ctromagnetsmovethelobestotheperi-

r-shot,andtowardthecenterof thewheel

otistobe indicated,thelobeisallowedto

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ELEMENTS

EW

ActuatingSpringMounting

on,midwaybetweentheextremitiesof

d,themovablecylindricallobesactu-

lthemovementofthetracerindicating

actuatingswitchesaremountedona

actuatedthroughageartrainby means

oftherangechart.Themountingforthe

s23 and25.Theswitchnearestthecenter

rt-shot,thecenterswitch,thehit-shot,and

heover-shottracerindicationasshownin

m movesslowlyfromapositionapprox-

thefiringpoint,backtowardthe firing

whichtherangechartandtargetindicate

mingleg.Atthemidpoint,wherethe

etis 602yards,theswitchsupportingarm

mately30degreesofthe firingpoint.As

romthemidpointcausingtheslant range

trolswitchesarecarriedawayfromthefir-

ositionof theswitcheswithrelationto

or increasestheamountoftravelofthe

beforetheycontactthespringononeof the

thussimulatingthechangeinthetime of

hetargetencounteredinactualfiring.

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ELEMENTS

ICSOF8

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ggeartrainconsistsofa setofbeveled

supportingarm,a driveshaft,anda

mountedchaincooperatingwithit.One

hechainhasa blockattachedtoiton

Theother sidehasacounterbalancing

).Eachchart isprovidedwithachannel-

ck,whichiscurvedin theshapeofthegraph

ojectiletravelingfromthegun muzzle

pon.Thetimechannelmustcorrespondto

ucedonthe frontsideofthechart,for use

ications.Inorderthat theminimumof

redinsettingachart inpositionforoperat-

dwitha guidetofeedtheroller intothe

esintothemachinebymeansof thegear

erattachedtothechainis graduallycarried

ntcausesthetime-delayswitcharmto

hefiringpositionatthecenterof theback

idpointor minimumslantrangeis

e,thetimechannelis ofsuchshapethat

upward,rotatingtheswitcharmcounter-

wayfromthefiringpoint(fig. 27).The

ablecylindricallobesonthecontrolwheel

ndforthewheelto traveltheangulardis-

Theangulardistancebetweenthefiring

e-delayswitchesiscontinuallychangedby

art.The resultisacontinualchangein

ntwhenthe cylindricallobesareadjusted,

gofthegun,and thetimewhentheypass

chestoactuatethetracerstreamin the

sactionistocausethe tracerindications

atthesamerelativeintervalafter firingthat

pearin thevicinityofatargetwhenfired

nge.

dfor usewitheachdirector.Basic-

al;thedifferenceliesin thespeedofthe

e,andthealtitudeof thetarget(fig.28).

etisthesidethat canbeseenthroughthe

rontofthe director.Itconsistsoftwo

na plasticinsulatingbase.Thecentral

heetsisshapedin accordancewiththe

fthetargetasit changeswiththechanging

efieldoffire; forexample,chartNo.1isv

anetraveling60yardspersecondandat

ed.Themidpointhorizontalrangeis600

0yards.Forthepurposeof thedirector,the

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ELEMENTS

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attheairplanecomesintothefield offireat

ds.Themidpointslantrangeis602 yards.

ne willbewithinthefield offireisas-

y52seconds;thustheairplanepasses outof

650yards.

ea,orthe centralcurvedsectionof

ethesize ofthetargetthatis likelytobe

dat thespeedonwhichthechartcurveis

No.1,theareais relativelylarge,since

rdsper second,whichisapproximately

elytobemoreeasilyhit. ChartNo.2,

eling 150yardspersecond,orapproxi-

has ahittingareathatis relativelysmall

ultyofproducinga hit-shot

ctricallyconnectedtothetwomain

t,ismountedalongthe bottomofthein-

eredgeofthechannelis notchedateither

matelyVsinchbelowtheinsulatingmaterial

agingtheholdingclips onthechartcarriage.

thelowerright-handedgeofthe chartfor

onafterthe carriageclipshavebeenen-

chedto thesideofthis bottomchannel,

n frontofthechart.Thisangle engages

nitial time-delaymicro-switch,visible

dcorneroftheinstructor'sviewingwindow

ctor(fig.27and29).Whenthe chartisin

notengagethemicro-switch.Thetime

movefromthestartingpositiontothe micro^

elaybetweenthefiringof thefirstshotand

nsof thetracerlightsinthe target.Inthe

hicharebased onairplanescomingintothe

slantrangeof1,710yards,the timerequired

micro-switchisslightlyinexcessof3seconds.

dwhendemonstratingthevarioustypesof

nedinparagraph9. Thechartmustmove

hto actuatethemicro-switchbeforeany

htsinthe targetwilltakeplace.Theback

tha channelforactuatingthetime-delay

sshapedinaccordancewiththegraphof

ojectileasexplainedinsubparagrapho,

ateralslideorchartcarriageis provided

fig.29). Itisequippedwithspring clips

e channelalongtheloweredgeofthe chart.

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ELEMENTS

ghtsideasviewedthroughthe slotonthe

or.Therackis drivenatViinchper second,

drivenby theelectricmotor,whichcon-

ordrivingthe directormechanism.The

allysothatthe gearsmaybemanuallydis-

ever.Aspringcausesthelever tore-

mentwiththerack,whennotprevented

ntofthechartcarriageto theleftis

sesthecharttobein theproperstarting

ecttime-delayforthefirst shotindication

riageand charthavebeenmovedtothe

osimulatethe targetairplanepassingout

pletecyclecut-offmicro-switch,whichoper-

emetalsurfacesofthe angleonthefront

"OFF"positionandthusbreakstheelectrical

sthedrivingmotor tostop,butdoesnot

directororthefloodlight inthetarget,or

erationofthe soundequipmentwithref-

Beforethechartis returnedtoitsinitial

tchtothe "OFF"position,otherwisethe

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enbyRangeSetter

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ELEMENTS

nassoonas thecompletecyclecut-offmicro-

t movestowardthestop,andthechartwill

has beenequippedwithastationary

atelyinfront ofthedirector.Thetarget

20 feetfromthefrontofthe director,

closeror fartherawayifdesired.Theonly

twillbe tochangethevisibilityofthe target

cations.Thestationarytargetcabinet

alldimensions,mountedfromaboveby

t,approximatelyinthecenterof an18-inch

tancethetargetisset fromthedirector,a

eis intendedtorepresenttheportionofthe

getonwhichtherangesetter shouldcon-

angleof about6degrees(fig.31).Behind

ne,whichismovedmechanically.Themove-

getherwiththe rotationofthetargetairplane,

eairplaneis movingacrossthesky.

de ofthetargetare freeofmechanism.

he speedofthemovementofthecloudsand

airplane,projectsfromtherightsideof the

uitesimple.Thelargestelementisa

oudsceneis supported(fig.32).Atarget

smismountedinfrontofthe clouddrum.

equippedwitha drivingmotortodrivethe

mmechanismismountedin thelowerleft

orusewiththetracerstreamlightsis pro-

untedinthe lowerrightcorner.

upportedona%6-inchdiameterstain-

dofthewireis supportedverticallyina

pulley,andheld inplacebya setscrew.

y abovethetopofthecloud drumandis

clouddrumbymeansofa.0.005-inch

re(fig.33).As viewedfromtheopenface

ofthecabinetremoved,thesteelwireis

ughasmall holeintheleft side.Inmaking

y,approximately15inchesofwireshould

deofthe cabinettobecarriedaroundthe

cktowardthe shaftonthedrum.Theother

sufficientlylongtopassaroundthe hubof

or thetwoendsofthe wiretobeconnected

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elt. Inordertoprovidesufficienttension

argetairplanetorotatethe sameamounteach

eriodoftime,a smallspringhasbeenused

drivingwire(fig. 33).Sincethedrum

ction,asviewedfromthetop,and itisneces-

ateinacounterclockwisedirection,asviewed

re mustbecrossedtoprovidethis change

nehasrotated approximately120degrees,

ddrumis permittedtorotateafterthis

lslideon thedrumshaft.Undernormal

drumwillstoprotatingatthetime theswitch

rchartstopsoperationofthedirector.In

ions,however,suchaswhenaninstructoris

oftracerindicationsbyholdingthe director

drummayrotateconsiderablylongerthan

rytheairplanethroughits normalcourse.It

wireshouldslip,underthesecircumstances,

e totheequipment.

itchissnappedto the"ON"position,

edtotherightoftheairplane targetdrive

ectromagnetisattachedtoapulley which

ras thetargetairplane.Aspringis connected

ecabinetto theleftofthe targetairplane

pulleyisprovidedwith apinmountedon

gagedby theelectromagnet-actuatedpulley

gnetisde-energizedandthespringreturns

sition.Thiscausestheairplanetobe turned

sition.Itis broughtagainstastopwhich

tialposition.

adeofdie-castmetal,which,whileserv-

cannotbe readilybentwithoutbreaking.

ightbulb,ismountedinthefuselagewith the

rojectingbeyondthefrontofthebody,in

34).A singleleadwireissolderedto the

eofthe lamp.Thesidecontacttothebulb

f theairplaneandthesupportingwire.A

edto covertheundersideofthe fuselage.

ainstthebaseof thelightbulb.Theair-

dedwitha right-anglebend,andthenis

metalfuselageenclosure,andupthroughthe

collarequippedwithasetscrewis slipped

gainstthe airplanetoclamptheairplane,the

tetogether.Inorder toinsuretheairplane

ire isrigidlyfastenedtothe undersideof

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opRemoved

cooperateswiththecontactmechanism

atasthehit-shotarrives immediatelybelow

tis extinguishedandthelightinthe airplane

stanttoindicateanexplosion.

theairplaneandthemovementofthe

dinaccordancewiththespeedof theairplane

rchartinuse. Ahandlever,whichactuates

m,projectsfromtheright-handsideofthe

leveris pushedawayfromtheopenside

driveroller,whichitlocates,is towardthe

speedof thecloudsceneandthetargetair-

wercourses.Withleverpushedto itsex-

tion,theadjustmentwill becorrectfor


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ELEMENTS

MPBASELEAD

andMounting

spersecond.Whenthehand leverismoved

irectionsothat thefrictiondriveroller

um,theadjustmentwillbe correctforair-

persecond.Obviously,speedsbetween60

yardsper secondcanbeobtainedbymoving

erproportioneddistancefromeitherofthe

eedsarenotneededsincerange adjustment

peedsarenotprovided.

ucingtracerindicationsinthetarget is

ndcorner,justinside theopensideofthe

consistsofamotor-drivenshafton which

prings thatinturnare responsivetospring

tothemovingshaft(figs. 36and37).These

ately3inchesapart.Eachisequippedwith

amp ismountedonthefree endofa

wireapproximately9or10 incheslong.Two

slipring throughdiametricallyopposite

tionwithsetscrewsinthe huboftheslip

tinthe airplane,onesideofthepencil-type

yconnectedtothemusicwiresupport.A

e otherlampcontactandbroughttothe

ircuit.Awiper-typecontactisprovidedto

alconnectionwiththeslipring.The.six

xplosionlight intheairplaneare allcon-

ry,110-vprimarytransformer,whichis

deofthe box(fig.32).Theslipring shaft

ainandsprocketconnectedtoa%0hp, 110-v,


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ELEMENTS

NET

Y

StreamMechanism

earreducercombination,mountedbelowthe

dthetracerlights arecontrolledbythe

(fig. 5).

ringseachprovidedwithlightsthatare

onstitutesthemeansofsimulatingthethree

ms.Thefirstpair oflights,asviewed

hecabinet,indicateashort-shot(fig.36).

etracerslipring ispermittedtomakeone-

one-halfrevolutiontakesplace,oneofthe

throughan arc,acrosstheopensectionof

ort-shottracerindicatorwilltravelthrough

rthatitwillpassin frontoftheairplane

centerslipring istosimulatethe

pportsfor theselightsaresomewhatshorter,

ssimmediatelybeneaththecenterofthe air-

enalightof thistracergroupapproaches

shedandremainsextinguisheduntilitpasses

isextinguished,thesmalllightin theair-


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blocatedimmediatelybelowthemain

is foruseinadjustingthe volumeofbattle

oducingequipmentinvolvesuchthings

etone arm,height,thetonearmhinge,

trip,theboosterspringsetting,andthe

stments.

etothe weightofthearm,is con-

ncingspringattherear ofthearm(fig.38).

onisrequiredto providetheneedlepressure

rationofthepick-upwiththetonearm

onthis recordchanger.Careshouldbe

e counterbalancingspringdoesnotrub

onearmskirtorany associatedpartsin

sorbindsthefree verticalmovementof

arfallacythatitis possibletoprolongneedle

the needlepressureonagivenpick-up

usedbythe manufacturer.Thecorrect

othe needleandtonearmdesign,andcan-

edforagivenset ofparts.Furtherreduc-

,by changingthespringtension,isthere-

armheight adjustmentscrew(fig.38),

he tonearmwhenitis intheplaying

he turntable.Withthecorrectsettingof

etonearmshoulddescenduntilthe needle

the leveloftheturntablesurface.The

wshouldnotbeused toadjusttheheight

duringachangecycle;thisheightis con-

of thetonearmliftpin (fig.38).Should

videnceofbinding orimpedingthefree

onearm,itmaybe necessarytoreplace

matictripmechanismmaybeneces-

ratesadualtripto insurepositivecut-off

s.Afterthetone armhasplayedinfar

eof theneedlefromthecenterspindleis

,therecordchangerwilltripregardlessof

ut-offoreccentricgrooveontherecord.

sa"minimumdiametercircletrip."The

circleisset atthefactorytobe approx-

onsinadjustmentorreadjustmentofthis

bymovingthepositionof thetripshoe

p shoeislockedinpositionby means


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.

ntingAssembly

menthasbeen satisfactorilycompleted.

edthrougha holecutinthe maindrive

oti nachangecycle(E,fig.47).

pactionofthe changermechanism

ditions,asecondtrippingdevicehasbeen

thanyoutwardmovementofthetone

withinapproximately2Vzinchesofthe

actuatedbyasmalldogandratchetcom-

djustment(fig.40).

erspring (30,fig.40),isto move

nof therecordintothefirst grooveauto-


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E

E

SEMBLY4

LASSEM.RAPD80306

ger TopViewandPartsList

yrecordshavewhatisknownasa "lead-

callycarriestheneedlefromthemargin

ordgrooves.Inthecaseofolder type

hoseofthemechanicallyrecordedtype

ove,theboosterspringsuppliesjust enough

leacrossthe margintotherecordgrooves.

sbuilt intothetonearmlocatorlever

singlepieceoflightspring wire(30,fig.40).


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62/90

bythis springshouldbejustsufficientto

emarginofa recordwhichcontainsno

djustmentoftheboosterspring,check

chand 12-inchrecordstomakesurethat

otincreasetheoperatingpressureof the

ointthatittendsto maketheneedleslide

grooves.Accesstotheboosterspring can

armis inthe"REST"positionwiththe

movingthetonearm locatorleverassem-

thechangersubpanelwiththefinger.Ad-

onshouldbe madewithapairof light

Thetension,measuredatthepointof con-

pring(30,fig.40), andthetonearmlever

ctory.Thevaluesrangebetween7and

thetypeof needleandcartridgeused

emelylightneedlepressurealsorequirea

n).CAUTION:Theshieldedpick-up

sthavesufficientslackbetweenthetone

he tonearmleadentersthesubpanel,to

ementofthetonearm;if sufficient,theaction

e overcome,orbeoveremphasized.This

oreattemptinganyboosterspringadjustments.

arm retardlever(49,fig.40)is to

fthetone armasitmovesfromthe outer

rdstheedgeoftherecordto beplayed

gecycle.Anadditionalfunctionistopre-

pringuntil theneedlehasloweredonto

ordtobeplayed.Insufficienttensionof

pring (47,fig.40)willpermitactionof

heneedlecomesto restontherecord,

cttonearmindexing.Excessivepressure

erspringwillcauserough,jerkyaction

esfromtheouteredgeof thechangerpanel.

e adjustingdialonthebackof the

indicatetherangesettingasproduced

to besurethatthe indicationonthedial

1on thecarriagereadyforoperation.Be

ttostrikethe stop.Bymeansofthehand-

irector,raisethemovablecontactuntil

ting areas.Withthisadjustment,the

yards.Ifit doesnotdoso,grip thedial

dropdoor intherightside ofthedirector

ey untiltheindicationis1,710yards.


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VER

BLY

CREW

EMBLY

R

R


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64/90

slidingthepulleyslightlywithreference

sedtoactuatethefivemicro-switches

etime-delaymechanisminthedirector.In

s tooperate,itmaybenecessaryto remove

eleafspringfromtheswitchbody,and shape

cebetter contact(fig.26).Theleafspring

therewillbeapproximatelyaVs-inchinter-

gandtheactuatingsurface.

ichactuatethemovablelobesonthe

meansof screwsthroughasheetmetal

ovidedforadjustment(fig.22).The

solocatedthatthelever-likehammerwill

he timingdiskcompletelyintoposition.

suchamannerthat thestrikingofthelobe

hecoreof theelectromagnetfromgoing

heelectromagnetcoreisnot permitted

ecoilwilltendto overheat.Undercon-

the coiltoburnout.

uldberemovedfromthedirector

sand screwscheckedtobesurethatthey

echanged,thespeedofthe targetsimu-

uld benoted.Theeightchartsprovide

60yards or150yardsper second.Itis

adjustingleveronthe rightsideofthe

ngesetter,be correctlyadjustedtocorre-

ed. Thelevermustbepushedbackso

ovedouttowardtheperipheryofthe drum

velingat60 yardspersecondareused

rgetstravelingat 150yardspersecond

be movedtowardtherangesetterin

rollertowardthecenterofthe clouddrum.

rshouldbe pushedasfarasit willgo.

tbe soadjusted,thatwhenthemid-

ched,asindicatedbythelowpointon

airplanewillbeparallelwiththe lineof

maybenecessaryoccasionallytorun

e positionoftheairplaneat themidpoint.

ctlylocatedatthemidpoint,thesetscrew,

einthe pulleysleeveshouldbeloosened

ghtlyin theproperdirection.


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65/90

s,whichproducethe tracerstream

ckedperiodicallytobesuretheymove

ortingbrackets.Intestingtheirfreedom

olvedelectromagnetcoreinitsenergized

ethe systemoflightsslowlycounterclock-

ure thatnoneofthetracerlights strikes

oint. Aslightbendofthe supportingwire

adjustment.

tsthattravelonthe slipringsofthe

rethateveryone makespropercontactat

toneisnot makingpropercontact,bend

cerstoproducethe desiredresult.In

necessarytoremovethecontactassembly

ngscrews(fig.37).NOTE:Keepfaces

polished.

elmayperformthemoreintricate

onlyunderthesupervisionofcompetent

erecord changerandturntableequip-

uiredonthe soundequipment.Themotor

ringsand thereforerequiresnolubrication.

aringsarelubricatedat thefactory

bricationfor1year.After1year, they

onthswith1or2 dropsofOIL,engine,SAE

bearingcanbeoiledafterlifting off

cingtheturntable,makesurethatthe

eslipsintotheslot onthebottomsurface

akecarenot todamagethemotoridler

rcumstance,allowoiltocomeincontact

will requireoilingonallof themoving

sprescribed,topromotesmoothaction


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N


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N


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69/90

TMOVING

LMOF

T

E.

ationGuide FrontView

hepointsto beoiledareshownin figures

L,engine,SAE30,foralltemperatures

ne,SAE10,for temperaturesbetween

slidingcontactsurfacesonthedirector

eslidingcontactsandslip ringsofthe

rgetmustalsobe keptfreeofoil.Failure

reinthetracerindications.


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71/90

vablelobes.Theaccumulationofexcessive

lobestobesluggishin theirmovement.

ovedforcleaning,itisdesirableto check

ewsandnuts tobesurethat theyaretight,

ntsrequiringlubrication(figs.41and42).

or,thecabinet,andthe accessoryparts,

emovethe parts.Insettingthedirector

monesideand watchthattherangedial

peration.

sourcetowhichtheDirectorTrainer

v,60-cycleoperation,unlesstheequipment

echanismespeciallydesignedforsomeother

ergesfromthe rearofthetonearm

goesdownthroughthe metalbaseplate,

anel,thatitwill notrestrictthefreemove-

osstherecord.Itisimportantthat thewire

es.Donotattemptto pushtheexcesswire

fthemovablelobesof thetimingdisk

theslots astheyenterthefiring zone.

chanicallycenteredintheslots,asthe disk

ndthe movablecontactworm.Unless

handorinshipping,theywill beinproper

etethehalfturnto thefiringzone,which

e rangedisk.Inorderto besurethat

tposition,dropthedooron therightside

thembeforeinitial operationofthedirector.

eft sideofthefiringdisk, asviewedfrom

oron thehalfofthe timingdiskfarthest

shestandsin frontoftheopenedsideat

mustbecentrallylocatedintheslots.

edirectorchart.Themetalchannel

ttom.Thetimechannelmustfacetoward

dengagethe time-delayroller(figs.19and

oller properlywillcausethecarriageto

ofthe chartasnearlyhorizontalaspos-

sition.

sonthemechanismtight.

ontrolknobofthe recordchangerin

henthetonearmismovedmanually.

ethetonearm mechanism.


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PTOMSOFTROUBLE

gdisassemblyofmajorpartsshould

hesupervisionofcompetentpersonnel.

d tobereproducedwhentheproper

adeandtheswitchesturnedonmaybedue

amplifiertubes.Figure13 designatesthe

be.

ebattlereproducingunitmay indicate

A poortonemaybeevidenceofa worn

pectthe undersideofthepanel to

erdoesnot comeintocontactwithanypart

otherthanatthe fourcornerswhereitrests

hecktobesure thatthestuds,(14,fig.47),

eoftheholesin thecabinetpanel.Inspectall

nyor allofthemare drawntootightly,

cethistrouble.Anyphonographequipment

thevolumecontrolsettingsat which

ayinganaveragerecordwilloperate

etheturntableandinspectthe rubber

(66,fig.45) forflatorworn spotswhich

table.Withtheturntableremoved,rotate

surethatitturns smoothly.

tion"occurs,removetheturntableand

e(40,fig.40) withthefingerstodetermine

Highfrictionatthispointmay besufficient

downinstantaneously.Applyonlyadrop

0, tothetwospindlebearings.If theturn-

anextentthatreplacementisnecessary,the

earassembly(39,fig. 40,andfig.46)

dofreplacingonlythespindle.This spindle

fig.46)is fittedwithprecisionmachinesat

roperclearancesandsmoothoperation.

rs,turnoff thechangerduringachange

gagementlever(41,fig.40) maybe


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NGS

rDisassembled-TopViewand PartsList


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74/90

PTOMSOFTROUBLE

hefinger.This clutchengagementlever

tiondue toitsengagementwiththetrip

oint"M."Ifthis engagementisnotpositive,

fthe triplever(44,fig.40) forevidencesof

sitiveengagementmaybeobtainedby

50,fig.40).This springtensionmustbe

utchengagementleverinthe "UP"position.

pringwillresult infailuretotrip.

alsobedue tothefactthatthe switch

e"AUTOMATIC"positionwhenreleased.

ombindingof therollerleveronits bearing

sioninthe spring(9,fig.47),or excessive

otionofthecontrollever(36,fig. 40).

s totrip,turnoff thechangerduring

clutchengagementlever(41,fig. 40)maybe

oldthetrip leverawaysothattheengage-

the"UP"position.Theclutchengagement

"UP"positionduetobindingat anypoint.

etouse anylubricantatthebearing

mentlever(51,fig.40); thisbearingisin-

ndry,andoperateby gravity.Excessive

ldtend tomaketheneedlejumpout of

cord(subparagraphf,above)andprevent

-upleadwire(22,fig.40) musthavesuf-

onearmandthe pointwherethetonearm

opermit freesidewisemovementofthetone

uldbeso positionedthatitlooselyrests

mediatelybelowthepointatwhichitleaves

ernocircumstancesshouldtheshieldedwire

ed taut,restrictingfreetonearmmovement

wertocompleteachangecycle,inspect

ivegear(1,fig.47 )forexcessivefrictionor

orarmbearingsforexcessivefrictionor

amat anytimeduringachangecycle

jammingof theselectorarmswiththe

movetherecordsandattempttofreethe

rntableina reversedirectionthroughone-

pparentlyclearedbysuch'action,the

edbyoperatingitautomaticallyseveraltimes,

doesnot clear,inspecttheundersideof

agedormissingparts.I nspectthemeshing

7)withthepinion gear(11,fig.47).If the

t is,iftheyare notsotimedas tofittogether


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eto thefactthattheclutchengagement

ndamagedorbent.Thisclutchengagement

fthelowerprojectionson thepiniongear,

niongearandthe teethofthemaindrive gear

ogetherproperlywheneverthemechanism

eclutchengagementleveris bent,itmaybe

thetwogears meshproperlywhenthe

visablethatthechangermechanismbe

is timingormeshingbetweenthetwogears

vedduringanyadjustmentsorinspections.

gunsound tobeaudiblemaybe dueto

speaker.Extremedistortionorpoorrepro-

f abrokenspeakercone.Intheeventthat

occurs,notifyordnancemaintenanceper-

ngcontactwiththeperipheryof thetim-

agraph23a,maycausepoorsimulated

hetimingdiskto bemovedtotheex-

otsarefiredandthe electromagnetsener-

theproper tracerindications.Thecauseof

orspring contactbetweentheimpulseswitch

the timingdisk(fig.17).

operatewhenthefiringswitchis

aybedue tothesharingofa pininthe

cerspringcoupling.Tocheckthis,open

edrivingmotoris runningwhiletheother

sis definiteproofthatapin hasbeen

etweenthemotorandthe gearreducer

plingis broken,itisa simplematterto

ouplinginitsplace.If apinhasbeen

be inthecouplingbetweenthegearre-

mechanism.Insuchacase,simplyreplace

seapinhasbeen shearedinsidethegear

maintenancepersonnel.

earboxwas probablycausedbythe

tin thechartcarriage.Caremustbetaken

delaychannelrollerdoesnotgetcaught

7).Anotherpossiblesourceoftrouble

e oftheelectromagnetleversagainstone

mightbe duetoamovablelobereaching

elocationotherthancenteredintheslot.


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spectedto besurethatall movablelobes,

therangesetter'spositionbehindthe direc-

ng diskslots,andthattheyremain in

lvibrationofthe machineinaction.Ordi-

ychannelroller,andthemovabletiming

ofpositionsoas tocausejammingunless

henoilingor throughvibrationinshipping.

gesetter'sdialmaybedue tooneof

d out.Replaceitthroughthedooron the

witha7-wattbulb.Lackoflightfor view-

nstructor'swindowmaybeduetothelight

cabinethavingburnedout.Itmay also

ulb,throughthe door.

witchissnappedtothe"ON"position

rget floodlightsshouldbelighted.In

earenotlighted,it isprobablyduetotheir

hashappened,replacethem.Theflood

dardbulbdesired.A25-watttubular,

hed.Oilanddirt accumulatedonthe

entinsulationto preventapairofthe tracer

airoflampsis out,cleantheslipringand

PER,flint,classB,No.00, tomakesure

sadequatebeforedecidingthatthelamps

epair orhit-shottracersareanexception

t theleftonthis groupisnormally

thetracerstreammechanismshould

ncil-type,flashlightbulb.Inorder to

reamlights,disconnectthewire from

ring,andslipthe lampfromitssupporting

blyisreplacedbyreversingthis action.

ofthedirectortheshort-shotorover-

etargetfailto operate,itmaybethatthe

ymechanismarenotoperatingcorrectly

magnetsthatreleasesthedogsonthetracer

rnedout.First,inspecttheswitchmecha-

surethatit isnotthecauseof thedifficulty.

on,noteif themovablelobesproduce

htheleafspringsonthemicro-switchesto

toclicktothe"ON"position.Ifthis does

bleadjustmentinthedefectiveswitch

onofthe movablelobessothattheypro-

ent.Ifthemovablelobeis notbeingset


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T

ngagetheleafspringofthe particularmicro-

theadjustmentoftheelectromagnet(fig.22).

sted,eitherforwardorbackward,toprovide

oradjustmentoftheelectromagnetmay

sucha positionthatitwill passbetween

tchspringsratherthanunder them.Check

omagnetlever;alsoreplaceifit isbadly

heairplanefailsto lightonhit-shots,

oroperationofthe contactonthecenter

ghtintheairplanehas burnedout.Ifafter

ofanydistortionandtheremovalofany

osion,thedifficultyisnotcured,replacethe

odisconnectthesinglewireleadingfrom

ctromagnetsupport,atthejoint,nearthe

makethereplacement.Loosentheset

ampstheairplanelamp andbottomto-

and liftthecollarandthe airplaneup

osionlampmaythenbe readilyremoved

ane.If abulbwitha leadwireattached

ecessarytodisconnecttheleadwirefrom

dsolderit toanewbulb.In soldering

aminimumofheatin ordertoproduceas

leinthe lampassembly.Replacethe

heorderofoperations.Afterrelocating

chanismshouldbecheckedtobesure that

operangle.Todo this,insertchartNo.1

outtothe initialstopwhilereleasingthe

r eleaselever.Releasepinionrelease

tchtothe "ON"positionandwatchthe

directorcabinetAtthetimethe moveable

of thetargetpath,whichisindicatedby

angechart,checkthetargetairplaneto

paralleltothe lineofvisionofthe range

positionbehindthe director.Makeany

tionintheinitialpositionofthe airplane.

T

AGE.

ytomovetheequipmentafterit has

uldbeseparatedinto unitssimilartothe


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kendownwhenreceived.If thedistance

ht,thatis, withinthesamebuilding,thismay

tanceis great,itshould,ofcourse,becrated.

move,orforcrating,thesoundequipment

econtrolunit, thespeakerunit,andthe

utlinedunderuncrating.Thesupportsunder

eleasedatthebackends,androtateduntil

de wallsofthecabinet.Inthis position,

endsothatthe rearendisresting onthe

boltstakenfromthe backofthecontrolunit

thespeakerunit throughholes,whichwere

cking.Theuprightsthatwere mountedon

netshouldbe usedtotiethe topofthecon-

nittogether,utilizingthe boltsthatwere

e units.Adowelpinin eithersideofthe top

idedtocooperatewithsuitableholesinthe

uideforlocatingandfasteningthe uprights

theholesutilizedinthe originalshipment

movedfromthe tripodandcrated

oved.Thetargetshouldbeliftedfromits

eremovedbylooseningthe setscrewin

edirectorbaseandtargetbase canbe

piecesbyremovingthebolts.Thecharts

ragecrate andprotectedagainstdamage

uipmentistobe stored,theunfinished

nedwithSOLVENT,dry-cleaning,and

rust-preventive,light,andtheequipment

articularlyimportantthatthe moving

directorandin thetargettracermechanism

The variouselementsshouldbecovered

edandcratedto preventdustandgritfrom

hanism.Weeklyinspectionshouldbemade

eventiverenewedifnecessary.

againreturnedto service,completely

rustpreventive,light,withSOLVENT,

ricatethevariousunits.

inedand refilled,andallbearings

rbeingstored.


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sts26

27

ES.

sindexesshouldbeconsultedfrequently

onsofreferencesgivenin thissectionand

ngtomaterielcoveredinthis manual:

eCatalog(explaining

forSupplyIndex(index

cations(listingFM's,

restto ordnance

BSD,SofSR's,

ncludesAlphabet-

ith Publications

1-1

aining(listing MR's,

TM's,andTR's

1-6

mStrips, andFilm

andFB'sby

FM21-7

ingGraphicTrain-

andDisplays)....FM21-8

LATURELISTS.

7-mmand40-mmA.A.

r37-mmand40-mm

209

sh)SNLF-209

rdirectorsM5and

ATIONS.

dM6TM9-659


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ent,

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nerM8....4

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tm 9-657 m8 director trainer

Documents