•Generaladjustment
Makethe linkagesandadjustmentsasdescribedinthemodelmanu-
facturer's instructionmanual.
When the throttle(enginecontrol)stickis set fromtheSLOW side to
the HIGHside, the throttleservooperatesas shown in Fig. 14A. If
revolutionmixingis applied at thistime,therudder servooperates
togetherwiththe throttleservoasshowninFig. 14B. Thisoperating
widthis calledthe mixingamount. The rudder stickoperatingwidth
becomes larger as the number of divisionsof thescalebecome larger.
The rudder servois operatedas shownin Fig. 14Bat rightrudder stick.
However, if thethrottle(enginecontrol)stickis at SLOW, theneutral
positionis fromtheleftand if thethrottle(engine control) stick is at
HIGH, the neutralpositionis fromthe right.
Throttle stick
neutralposition
HIGH
Upside
mixing amount
B.Rudder
servo
A.Throttle
servo
SLOW
Right
Left
•Revolutionmixingadjustment
When themain rotorrotates,thehelicopterattemptstoturnin the
opposite direction.To cancelthistorquereaction,thepitchof thetail
rotor (rudder)is increased.Revolutionmixingperformsthisoperation
simu.ltaneously withthe throttle(engine control),and is necessaryto
fly
a
helicopter.
(If
used
with
a
rate
gyro,
operation
is
much
easier.)
When main rotor rotates
clockwise.
Tail rotorpitch isincreased
so that the helicopter does
notturn to the left.
2Helicopter turns to the left.
1Check the directionof operationof each servo. To reverse the
directionof operation, switchthereverseswitch.
2Alwaysset theidle up switchandthrottle hold switch to
OFF(pushed to theopposite side).
3Make the basic adjustments described bythe modelhelicopter
manufacturer.
4Check theleftand right(up and down) throwof eachservo. If the
throwisincorrect,correctitbychanging the positionof the servo
horn hole,etc.
5Set thethrottlestick to about the center (medium slow) and
Down side
mixing amount
Fig.
14
Fig.
15
12If the helicopterturnsto theleftduringhovering, turntherevolu-
tionmixing up side knobclockwise.If the helicopterturnstothe
right,turntheknobcounterclockwise.
13Rategyrooutputadjustment(whenFP-G153 used)
Apositionabout 40% to80% of therategyrocontrol box scale
shouldbesufficient.(Differssomewhat withthemodel.)
If the tailof thehelicopter whips back and forth,the gyro output
shouldbeincreased.
•Idleupadjustment
When theidle upswitchisOFF,the throttle servo operates normally as
shown in Fig. 16A. Whentheswitchis ON, whentheidle uptrimmeris
suitablyset, the throttleservochanges to the maximum slow position
as shown in Fig.16B.
When idle upis used, hovering is stable and the rotor speedcan beheld
even when thepitch isreduced during rolls andprettier maneuvers are
possible.
1Set the transmitterthrottle(engine control)sticktomaximumslow
and set theidle upswitchto ON and set the idle uptrimmer to
about 20 to 25%.
2Next,set the idle upswitch to OFF, start theengine, hover, and
decidethespeed at hovering.Set theidle up switchtoON, hover,
and adjusttheidle up trimmerso thatthespeed is about thesame
as,or somewhatslower than,thatwhentheidle up switchisOFF.
Whentheidle uptrimmeris turnedclockwise,the speed increases.
Whenstartingthe engine and afteruse, always set the idleupswitch
to
OFF.SLOW
HIGH
SLOW
A. Throttle
servo
B.Throttle
servo
•Aileron and elevator AST (Adjustable Servo Throw)
The servo throw is changed withinthe
range shownbythehatchedlinesinFig.
17withtheaileron& elevatorASTtrim-
mer. The throwcan beadjustedfroma
maximum100% toa minimum 40% by
turningeach trimmerwitha flatblade
screwdriver.Set tothethrowmatchedto
the model.
•Throttle holdadjustment
HIGH
Fig.16
Fig.
17
install and linkthe servo hornat theneutralposition.
6Set the revolutionmixingup side knob toabout divisor 5 and
revolutionmixingdown side knob to about divisor 7.
7Check theengine throttlelinkage.
•Throttleopened fullyat throttlestickHIGH (up).
Throttleclosed fullyat throttleMAXIMUMSLOW (down).
•UseATL(AdjustableThrottle Limiter) trimming as much as pos-
sible.
This isconvenient because the HIGH side does not change evenif the
LOW side ischanged. Then set the throttlestickto itsfulloperating
width and set so that thepitch controlservo operates over itsmaxi-
mum throw.
Regarding the main rotor variationwidth, select the servo horn
positionas specifiedby the model manufacturer.
8Afterstartingtheengineand adjustingtheneedle, hover and adjust
the aileronand elevatortrim.Next,make the main rotor pitch at
hoveringsomewhat large withthe linkage.
9Adjustthe linkageso thatthe rudder trim is neutral at hovering.
10Afteradjustingallthe trimlevers,adjustrevolutionmixing.
11
If
the helicopterturns
to
the
right
duringhoveringafter
lift
off,
turn therevolutionmixingdown side knob clockwise.Ifthe
helicopter turns to the left,turnthe knob counterclockwise.
When thethrottleholdswitchispulledon, thethrottleservostopsat
the positionsetwiththethrottletrimmer.Trimmerscaledivision0 is
maximum slow.Settingtothehigh sideispossibleas thenumber of
divisionsincreases.Whenthe switchisOFF,thethrottleservoiscon-
trolledby thetransmitterthrottle(enginecontrol)stick.T his deviceis
used at autorotationtakeoff.Aftertheengine iscutor at maximum
slow (duringpractice),onlythe pitch control servo isoperated (pick
up) and safetakeoffispossible.
1Set the throttle(enginecontrol),throttle(enginecontrol)switch
and throttle(enginecontrol)trimmerso that the engine throttleis
fullyclosedat maximumslow.
2Set thethrottletrimmerso thatthe engine throttlebecomes maxi-
mum slowwhenthethrottleholdswitchissetto ON (pulledfor-
ward)atautorotationpractice.(Set so thatthe throttleis fully
closedwhentheengineis cut.)
3When thethrottlehold switchisset to OFF (pushed back), the
throttle(enginecontrol)servoand pitchcontrolservo mixingis
performed.Whentheswitchis settoON, the throttleservoisheld
(maximumslowset bythethrottletrimmer or fullyclosed) and
only thepitchcontrolservooperates.
4Whentheholdswitchisused at takeoff,etc., alwayshold switch
toOFFaftersettingthetransmitterthrottlesticktoslow.Also,
beforestartingtheengine, check if the idleupswitch and throttle
holdswitch areOFF.