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ICALMANUAL
VEMBER1943
Publ
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NICALMANUAL
persedesTM9-657,dated20January I943.
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vember1943
M8,ispublishedfor theinformation
ned.
TARYOFWAR:
(2);I Bn44(2).
ls;seeFM21-6.)
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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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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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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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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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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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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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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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PTOMSOFTROUBLE
LY'
Y
ARMSPR.
Y
LY
HINGASSEM.
LASSEM.RApD
hanism UnderSideViewandPartsList
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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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PTOMSOFTROUBLE
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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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1
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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,
ent..
nerM8....4
rg/access_use#pd-google