Servo Precautions
General Notes
W-1
•Donotlubricateservogearsormotors.
•Donotoverloadretractservosduringretractedor
extendedconditions.Makesuretheyareableto
traveltheirfulldeflection.Overloadingorstallinga
servocancauseexcessivecurrentdrain.
•Makesureallservosmovefreelythroughtheir
rotationsandnolinkageshanguporbind.A
bindingcontrollinkagecancauseaservotodraw
excessivecurrent.Astalledservocandraina
batterypackinamatterofminutes.
•Correctanycontrolsurface“buzz”or“flutter”as
soonasitisnoticedinflight,asthisconditioncan
destroythefeedbackpotentiometerintheservo.It
maybeextremelydangeroustoignoresuch“buzz”
or“flutter.”
•Usethesuppliedrubbergrommetsandbrassservo
eyeletswhenmountingyourservos.Donotover-
tightentheservomountingscrews,asthisnegates
thedampeningeffectoftherubbergrommets.
•Ensuretheservohornissecurelyfastenedto
theservo.UseonlytheJR
®
servoarmscrews
provided;thesizeisdifferentfromother
manufacturers.
•Discontinuetouseservoarmswhentheybecome
“yellowed”ordiscolored.Suchservoarmsmaybe
brittleandcansnapatanytime,possiblycausing
theaircrafttocrash.
•Checkallrelatedmountingscrewsandlinkages
frequently.Aircraftoftenvibrate,causinglinkages
andscrewstoloosen.
•Ensureyourbatterieshavebeenproperlycharged
priortoinitialflight.
•Keeptrackofthetimethesystemisturnedonso
youwillknowhowlongyoucansafelyoperate
yoursystem.
•Performagroundrangecheckpriortotheinitial
flightoftheday.Seethe“DailyFlightChecks
Section”forinformation.
•Checkallcontrolsurfacespriortoeachtakeoff.
•Usefrequencyflags.
•Donotflyyourmodelnearspectators,parking
areasoranyotherareathatcouldresultininjury
topeopleordamageofproperty.
•Donotflyduringadverseweatherconditions.
Poorvisibilitycancausedisorientationandloss
ofcontrolofyouraircraft.Strongwindscancause
similarproblems.
•Donotpointthetransmitterantennadirectlytoward
themodel.Theradiationpatternfromthetipofthe
antennaisinherentlylow.
•Donottakechances.Ifatanytimeduringflightyou
observeanyerraticorabnormaloperation,donot
resumeflightuntilthecauseoftheproblemhas
beenascertainedandcorrected.Safetycannever
betakenlightly.
Radiocontrolledmodelsareagreatsourceofpleasure.Unfortunately,theycanalsoposeapotentialhazardifnot
operatedandmaintainedproperly.
Itisimperativetoinstallyourradiocontrolsystemcorrectly.Additionally,yourlevelofpilotingcompetencymustbehigh
enoughtoensurethatyouareabletocontrolyouraircraftunderallconditions.Ifyouareanewcomertoradiocontrolled
flying,pleaseseekhelpfromanexperiencedpilotoryourlocalhobbyshop.
Safety Do’s and Don’ts for Pilots