Instructions

Flying The Navigator 250 | 27
16.8 If compass calibration fails
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Compasscalibration should bedoneat open outdoorarea.Thecalibrationprocess
mayfailduetomagneticinterferencefromsurroundingenvironment.
Failingofcompasscalibrationisindicatedby3prominentbeepsounds(3beeps).Incase
offailure:
1. Moveawayfrommagneticinterferences.
2. Disconnecttheightbatteryandre-connectit.
3. Restart the procedure.
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Successfullycompletedcalibrationprocedurescanbeskipped.
17. Flying the Navigator 250
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Beforeyouinstallthebattery,turnonthetransmitter.Anunboundaircraftisconsidered
uncontrolled.
17.1 Visual inspection
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Inspect the Navigator 250 for damage before every ight. Replace damaged
componentsbeforeyingagain.Onlyuseoriginalspareparts.
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Ensurethemotorarmsarefullyunfoldedinyingpositionandthelockingscrew/nuts
arecompletelytightened.
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EnsurethepropellerscanfreelyrotatewithouthittinganypartsoftheNavigator250body.
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Observe the condition of each motor:
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Motor shaft
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Motorscanfreelyrotate
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Propellerpositionandcondition
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Alwaysreplacedefectivepartsimmediately.
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Ifyouareunsureaboutyourproduct’sconditionconsultanexperiencedRCpilotor
contactourcustomersupport.DonotattemptanyfurtherightuntiltheNavigator250
istforight.
17.2 Placement at start position
PlacetheNavigator250on alevelsurface(e.g.stoneoor).Takenoteofchapter‘13.
Protectyourmodel’onpage14.
17.3 Stick controls
Refer to chapter ‘26. Terms’ on page 34andalsostudy‘14.9Controls’onpage21.
17.4 Flying
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Startwithsimpleightmanoeuversandgraduallyproceedtomorechallengingones.
1. PlacetheNavigator250onevenground,waitandobservetheGPSsignalreceptionlevel.
When taking off without GPS signal, the Navigator 250
will land at the location where R.T.H. is triggered.
2. Turn on the motors.
3. Checkproperfunctioningof
aileron , elevator , throttle and rudder .
4. IncreasethrottleuntiltheNavigator250isatleast50cmabovetheground.
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Atthisheight,youhavepassedtheso-calledgroundeffectandtheNavigator250
ismorestableinitsightposition,thuscanbecontrolledmoreeasily.
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Becareful when applying rudder ,which will rotate the Navigator 250 around
itsverticalcentreaxis,causingyoutobecomedisoriented.Studycarefullyhow
aileron and elevator behaveafterapplyingrudder.
5. You have now managed the critical part and can familiarize yourself with the
Navigator250bygentlethrottlemotions.
6. Toland,decreasethethrottleslightlyuntilitgravitatestotheground.
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Asomewhatsolidtouchdownisnoproblemandshouldnotbecorrectedwith
jerkythrottlemovements.
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Attempttotouchdownvertically(“helicopterlanding”).Avoidlandingwithhigh
horizontalspeeds(“airplanelanding”)topreventthelegsfromgettingentangled,
resultingintheNavigator250tumbling.
7. Afterlanding,turnoffthemotors.
8. Disconnectthebattery.