Arrow Shark X-Hydro User manual

XHydroInstruction Manual
Itisvitallyimportantthatyoureadthismanual
thoroughly toobtainthecorrectsetupandthesafest,
mostrewarding operationofyourArrowSharkRCBoat.
Pleasestudythemanualcarefullybeforeattemptingto
workonoroperateyourboat.
Safety Precautions
*Thisisahighperformanceradiocontrolledboat itisnotatoy.Adultsupervisionis
required for children who should be warned about the dangers of playing with gas
engines,fastspinningpropellersandofbeingincloseproximitytowater.
* This boat is controlled by radio signals which are susceptible to possible
interference from other transmitters, paging systems and other sources ofelectrical
noise. Before turning on your radio transmitter and receiver, make sure that noone
elseintheareaisoperatingaradioonthesamefrequency(channel).
*Afterturningonyourradio,watchitcarefullytoensurethatitisoperatingcorrectly
and not being affected by interference. Carry out a range check as advised by the
radiomanufacturertoensureyouwillbeabletomaintaincontrolofyourboatatyour
plannedmaximumoperatingdistance.
* Always fit a "Fail Safe" device so that your engine is stopped should the radio
encounterinterference,gooutofrangeorhaveitsbatterygoflat.Someradioshave
inbuiltFailSafesystems,butothersdonot.Theycanbepurchasedseparatelyatany
goodhobbyshop.
*Whentheengineisrunning,thepropellercanspinathighspeed.Nevertouchthe
propelleranytimetheengineisrunning.Beverycarefulthatanyitemsuchasloose
clothing,shirtsleeves,ties,scarves,longhairoranythingelsedoesnotgetanywhere
closetothepropeller,evenwhenit isstationery. Iftheclutchengages,thepropeller
can start to spin without warning and loose clothing etc can become entangled and
causeinjury.
* The speed and mass of this boat can inflict property damage and severe personal
injuryifacollisionoccurs.Neverrunthisboatinthepresenceofswimmersorwhere
thepossibilityofcollisionwithpeopleorpropertyexists.
* Model engines generate considerable heat. Do not touch any part of your engine
untilithascooled.Touchingthecylinderheadoranypartoftheexhaustsystemmay

resultinaseriousburn.
*Gasolineispoisonous.Donotallowittocomeintocontactwiththeeyesormouth.
Alwaysstorefuelinaclearlymarkedcontainerandoutofthereachofchildren.
*Gasolineisextremelyvolatile.Neverallow nakedflameoranypossiblesourceof
ignitionnearyourboat.Beverycarefulwhenrefuellingyourboat.
*Thisboatissetuptoracingstandards.Ifyouarestartingfromscratchatdrivinga
fastboat,getamoreexperienceddrivertotakeyourboatoutforthefirstfewtimes.
Whenyouareinitiallygoingfaster,dosoonclearwatersawayfromotherboatsand
withyourmoreexperienceddriverclose bytogiveadviceandsupport.Ifyoudon't
know an experienced driver, find an RC Boat Club in your area and join up. Most
clubs welcome new members and nearly always have experienced drivers who will
helpyou.It'smorefunrunningyourboatswithotherstoo.
Step1:AccessoriesCheck
Inordertoavoidyourboatbeingdamagedduringtransportation,we
removedtheflexibleshaft,turnfins,rudder,propellerandsomeother
itemsofthehardware.Whenyoureceivetheboat,pleasefirstcheckthe
accessorybagfortheseitemsasshowninthephotobelow.You willneed
toinstallthem (aswe'llexplaininthefollowingsteps)beforeyouareable
tooperateyourboat.
Youraccessorybagshouldcontainthefollowingitems:

#1:FlexibleShaft(precuttotherightlengthtofitindirectlytoyourboat).
#2:RudderAssemblyandBolts.
#3:7016/2Prop(factorysharpened,balancedandpolished).
#4：6717/3Prop(factorysharpened,balancedandpolished).
#5：HydroCurvedTurnFinandBolts.
#6:BoatDisplay Stand.
#7:15kgMetal GearHiTorqueServo(forrudderoperation).
#8:CNCDualServoMountandBolts.
#9:PropNut.
#10:ReceiverSwitchCover.
#11:Antenna Tubewith BlackCap
#12:ShaftDriveDog
ToolsRequired
Youwillneedthefollowingtoolsanditemstocompletetheinstallation:
#1:PhillipsScrewdriver
#2:Scissors
#3:WireCutter
#4:HexWrench(1.5mm,2mm,4mm)
#5:Spanner(7mm,8mm,16mmx2)
#6:Spark PlugSpanner
#7:Loctite
#8:ShaftGrease
#9:LubricatingOil
#10:Zip Ties
#11:SmallHoleOpener
#12:4mm RoundFile(withhandle)
Step 2:BoatDisplay StandAssembly

*Therearefourplywoodboatstandpiecestwonarrowerpiecesthatformthesides,
and two taller pieces that form the ends to support the bottom of your boat on
rubberpaddedsections.Matchtheangledslotsinthebottomofoneoftheendpieces
to similar slots in the top of the side pieces, and slip them together. Repeat for the
other end piece. Optionally, for a more secure stand, you could apply CA glue or
epoxytothejointsofthestand.
Note:Thisboatstandisintendedfordisplayingyourboatatyourhomeoroffice.Itis
notforfielduse.You shouldcustommakeastrongerboatstandfrom PVCorstainless
steelpipeforfielduse.
Step 3:RudderAssembly
* Take out the rudder assembly from the accessory bag along with its installation
bolts.
*Usinga4mmhexwrench,securetherudderarmwiththetwoboltstothemounting
bracketthathasbeen preinstalledonthetransom (ieonthebackoftheboat).Applya
littleLoctite totheboltsbeforescrewingthemintothebracket.

* Use the pushrod connector supplied in the accessory bag to join the section of
pushrod that came with therudder tothe end ofthe pushrod projecting through the
transomviatheblackrubberpushrodsealinthecenteroftherudderbracket.
Note: You might still need to adjust the length of the pushrod after you install the
steeringservo(we'lldothatlater)inordertocentertherudderforpropercontrolwhen
runningyourboat.
*Connectthewater coolingtubethat projects throughthetransomtothenippleon
the topoftherudderblade.
Step 4:TurnFinInstallation AndPerformanceTip
*A curvedhydroturnfinissuppliedintheaccessorybagalongwithmountingbolts
andnuts.
*Onthebackofthestarboardsponsonisapreinstalledbracket.(Thestarboardside
is the righthand side when looking at the boat from behind it; the sponson is the
lowestpartofthehullthatridesonthesurfaceofthewater.)Slipbothofthesupplied
boltsthroughthebracketandthroughtheturnfin.Startthenutontothetopboltthen
usea7mmspannertoholdthenutanda4mmhexwrench toscrewinthebolt.Repeat
forthelowerbolt.Beforefinallytighteningthebolts,positiontheturnfinasshownin
theaboverightphoto.

PerformanceTips For Turn Fins
Turnfinshelpyourboatrunquicklyandsmoothlythroughaturn.Withhydroplanes
likeyourXHydro, theturnfingivesextragripinthewaterastheboatchanges
direction.
It'sveryimportantthatthefinbemountedsothatitisexactlyparallelwiththe
centerlineoftheboat.
Anglingthefinbackorforwardalittlecanhelpcorrectanytendencyoftheboatto
pull totherightorleft,andcanhelptoimprovetherideangleoftheboat.
Onlyverysmalladjustmentsshouldbemadeatatime.
Tiltingthebottomofthefintowardthefrontofthehydrowilltendtomaketheboat
tracktotheleftandwilltendtoliftthesponsonandthefrontoftheboat.
Tiltingthebottomofthefintowardthebackofthehydrowilltendtomaketheboat
tracktotherightandwilltendtodropdownthesponsonandthefrontoftheboat.
Step 5:FlexibleShaftInstallation
*Theflexibleshaftthatcomeswiththepackagehasbeenpregreasedandprecutto
the right length to fit your boat. It is best though to regrease the shaft with
lightweight marinegreasebeforeyouinsertitintothestrutdriveunitthathasbeen
preinstalledonthebackoftheboat.
*Slidethetopendoftheflexshaftthroughthestrutdriveunitonthetransomofthe
boatandeaseitupthroughthestuffingtubeuntilitemergesjustbehindtheclutchon
yourengine.
*Astheendoftheshaftcomesintoview,usearagtowipeoffanygreasesothatthe
shaftiscleanasyouslipitintothedrivecolletontheclutch.
*Ensuretheendoftheshaftissecurelyinsidethecollet,andthencheckthepropeller
end of the shaft for correct clearance from the strut as explained in the following
importanttip.
* With the correct clearance set between the strut and the thrust washer, use two
16mmspannerstotightenthecolletontheclutchandsosecurethetopendoftheflex
shaft.Whenrunningyourboat,frequentlycheckthatthecolletistighttoavoidyour
flexshaftbecominglooseandpossiblybeinglostinthewater.

Very Important TipForShaftInstallation
*Wheninsertingtheflexibleshaftthroughthestrutandupintothecollet,makesure
youleavea23mmgapbetweenthebackof strutandthefaceofthethrustwasheron
yourpropshaft.Thisiscriticalfortheproperworkingandlonglifeofyourflexshaft.
Whenthecrankshaftacceleratesfromlowtohighspeed,itwillcausetheclutchbell
tostretchoutanddrawbackabit,takingtheflexshaftwithit.Ifthereisnofreespace
left on thepropshaft, whentheclutchbelldraws back it willcreate astrainon the
flexshaftthatcouldcauseittofail inaveryshorttime.
Step 6:PropInstallation And Strut Adjustment Tip
* There are two propellers provided with your boat  the 3blade 6717/3 and the
2blade7016/2. Bothprops have been factorysharpened, balanced andpolished for
optimum performance. Each prop has its own advantage to suit difference water
conditions. Generally, the 6717/3willgive you faster speed inastraight line, while

the7016/2propoffersquickeracceleration.Tryeachpropatdifferenttimesuntilyou
become familiar with which prop gives you the best results depending on your
preferencesandwaterconditions.
*Wesuggesttryingthe6717/3tostartwith,buteitherpropisfine.Sliptheproponto
theendofthepropellershaftandturnitsothattheslotsengageintothelugsofthe
drivedogthathasbeenpreinstalledontheshaft.
* Apply a littleLoctite tothethreadonthe end oftheshaft andscrew thepropnut
ontothepropshaft.UseanAllenkeyorsimilarsmalldiametermetalrodthroughthe
holeinthenuttotightenitinplace.
Note:Thepropissharp,somakesureyouwearaglove,oruseapieceofcleanrag
whenholdingthepropasyou tightenthepropnut.
PerformanceTip
Adjustingtheangleofyourstrutdriveispartofthefunofdrivingyourboat,andyou
canfinetuneitforbestperformanceinvaryingconditions.Theobjectiveistohave
yourboatrunningwiththeleastamountofhulltouchingthewaterbutstillretaining
stability.

Thelessofyourhullthattouchesthewater,thelessdragandthehigherspeed.But
withtoolittlehullinthewater,theboatwillbecomelessstableandcouldoverturn.If
thereistoomuchhullinthewatersothebow(iethefront)isrunninglow,theboatis
saidtoberunning"wet".Iftheboatistoolightonthewaterwithonlyasmalllength
atthebackinthewater,itissaidtoberunning"loose".
Anglingthepropupwillliftthefrontofyourboatgenerallyresultinginlesshullin
thewaterandfasterspeed.Anglingtheproptoohighthoughwillcauseinstabilityand
thepropmay"ventilate"orspinwithoutgrippingbecauseit'stooclosetothesurface.
Anglingthepropdownwillliftthebackoftheboatandkeepmorehullinthewater
generallygivingmorestablerunningbutwithlessspeed.
Tryingdifferentpropangleswillfindtheonethatworksbestforyourboatin different
waterconditions. Tostartwith,runastraightedgealongthebottomoftheboat
projectingouttheback,andsetthestrutdriveunitsothepropshaftisparallelwith
thestraightedge.
Whenadjustingthestrut,youmayneedtoalsoslightlychangetheangleofthe
stuffingtube.Ifyoudoneedtoslightlyrebendthat,dosoverycarefullywiththeflex
shaftinsidethetubetominimisethechanceofmakingtoosharpabend.
Step 7:TunedPipe Performance Tip
Tunedpipesboostenginepowerbyusingthepressurewavesgeneratedby exhaust
gasestoliterallypullmorefuelintothecylinder.However,toachievethis,itis
criticaltohavetherightlengthfortheexhaustgasesastheytravelfrom theexhaust
flangetothe"belly"ofthetunedpipe(that'swherethepipeisatitswidestdiameter).
ForourbilletXP254Mengine,thisdistanceisbetween370and390mmwhichneeds
tobemeasuredalongthecentrelineoftheexhaustincludingtheheaderpipe,as
showninthediagram.Havingeitheralongerorshorterlengthwillreducethe
engine'sperformance.

Adjusting The TunedPipeLength
Youcanalwaysadjustthelength of thetunedpipetoseetheeffectithasonyour
engine.Itisalsointerestingtofindoutwhatarelengthsotherpeopleareusingand
comparetheperformancetheyachievewithyourownboat.
Toadjustthelength,simplyloosen theboltonthepipestopcollarandslidethepipe
andthecollarbackwardorforwardtothelengthyouwanttotry seethediagram
below.Beforemakinganychangethough,note(ormark)thepositionofthepipeas
deliveredfromthefactory.Ourtestingshows thatthebestperformanceisaround
370390mmbetweentheflangeto thebellyofthepipe.Ifyouchangethepipelength
andfindyourenginenolongerperformsproperly,justresetthepipetoitsoriginal
factorysetting.
Step 8:ServoInstallation
PleasenotethatwedonotincluderadiosystemsinourRTRboatsasmostmodelers
alreadyhavetheirownpreferredRCsystem. Thisapproachalsosavestheextracost
that theradiowouldincur.However,wedoincludea15kgHiTorqueMetal Gear
Servoinall ourRTRpackagesfortherudder. Thisservoisof thestandardservosize,
yetithasallthepoweryouneedforprecisecontroloftherudderathighspeeds.To
attainthislevelof servopower inthepastrequiredalarger1/4scaleservoand
modifyingtheservotraytofititin.Ournewrudderservofitsthestandardservotray
withoutanymodification.
However,youstillneedtoprovidethefollowingitemstocompletethis
installation.