Dynon Avionics SkyView Quick start guide


SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA1‐1
1. AutopilotIn‐FlightTuningProcedures
FlightTestPreparation


Theflighttestshouldbeconductedonaclear,VFRday.Itisrecommendedthat
clearingturnsbeperformedbeforeexecutingeachprocedure.

Atmanypoints,thepilot’sattentionwillbedividedbetweendocumentation,
configuringSkyView,andmaintainingsituationalawareness.Beforecommencing
theflighttest,ensurethatyouhaveadequatealtitude,clearweather,notraffic,no
obstructionsintheflightpath,greatvisibility,noairspaceconflicts,etc.Ifpossible,
bringsomeonealongonthefirstautopilottestflight.
Ifautopilotbehavior,performance,orinterferencewiththecontrolsiscauseforconcernwhile
flying,rememberthattheautopilotcanbedisconnectedinanyofthefollowingways:
•PresstheDisconnect/CWSbutton
•IfusingtheSIMPLIFIEDcontrols:
oEntertheAPMenu(MAINMENU>APMENU)andpresstheTRK+ALTbutton
indicatestheautopilotisengaged
indicatestheautopilotisnotengaged
•IfusingtheEXPERTcontrols:
oEntertheAPMenu(MAINMENU>APMENU)andpresstheAPbutton
indicatestheautopilotisengaged
indicatestheautopilotisnotengaged
•Turnofftheautopilotcircuitbreaker/switchorremovethefuse

AutopilotIn‐FlightTuningProcedures 
1‐2 SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA
RollAxisIn‐FlightTuningProcedure
Thisproceduretunestherollautopilotservoandthus,theflightcharacteristicsoftheaircraftin
headingholdsandturns.Thisprocedureshouldbeperformedwiththeautopilotrollaxisin
track(TRK+ALT)mode,wherethepurposeoftheautopilotistokeeptheaircraft’sGPSground
trackalignedwiththetrackbug(aswellasholdaltitude).Beforeexecutingthisprocedure:
1. TheautopilotcontrolsshouldbechangedtoSIMPLEmode(SETUPMENU>AUTOPILOT
SETUP>AUTOPILOTCONTROLS)
In‐FlightProcedure
Thefollowinglistisanoverviewoftheprocedure.Eachstepisdescribedinmoredetailafter
thelist,inflow‐chartandtextualformats.
1. Establishtrimmedlevelflightonafixedheading
2. EngageAutopilot(AP)inTRK+ALTmode
3. AllowafewminutesofstableflightunderAPcontrol
4. ChangetheTRKtarget90degreesfromthecurrenttarget
5. CheckforROLLSLIPindications
a. Ifobserved,disconnectAP,increaseROLLTORQUEby10%andstartover
b. IfROLLTORQUEisalreadysetto100%,contactDynon
6. Checkifaircraftisslowtorespond
a. Ifobserved,disconnectAP,increaseROLLSENSITIVITYby2andstartover
b. IfROLLSENSITIVITYisalreadymaxedout,contactDynon
7. Checkifaircraftis“twitchy”inROLLaxis
a. Ifobserved,decreaseROLLSENSITIVITYby1
b. ChangetheTRKtarget90degreesfromthecurrenttarget
c. CheckifaircraftovershootsTRKtarget
i. Ifobserved,disconnectAP,increaseROLLGAINby0.2andstartover
8. CheckifaircraftovershootsTRKtarget
a. IfobservedandyouhavebeenchangingROLLGAIN,disconnectAP,increase
ROLLGAINby0.2andstartover
b. IfobservedandyouhavenotbeenchangingROLLGAIN
i. IfROLLSENSITIVITYismaxedout,disconnectAP,increaseROLLGAINby
0.2andstartover
ii. Otherwise,disconnectAP,increaseROLLSENSITIVITYby2andstartover
9. VerifyacceptableAPRollperformance
a. Ifunacceptable,refertoRollTroubleshootingSection
b. Ifacceptable,procedureiscomplete

AutopilotIn‐FlightTuningProcedures
SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA1‐3
DetailedFlowchart

Figure1–RollAxis–FlightTestProcedure

AutopilotIn‐FlightTuningProcedures 
1‐4 SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA
DetailedExplanation
1. Establishtrimmedlevelflightonafixedheading
Youshouldstarttheprocedurebyplacingtheaircraftinlevelflight,inneutraltrim,onafixed
heading.Trytomaintainaconstantaltitudeduringtheprocedure.
2. EngagetheAutopilot(AP)inTRK+ALTmod
ToengagetheautopilotinTRK+ALTmode:
1. EntertheAPMenu(MAINMENU>AP)
2. Pressbutton3,TRK+ALT
3. Itshouldbehighlightedandlooklike 
Notethattheheading(HDG)bugundertheDGchangestothetrack(TRK)bugintrackmode.
3. AllowafewminutesofstableflightunderAPcontrol
Ensurethatyouarenotaffectingtheautopilot’scontroloftherollaxis,soyoucandetermine
theautopilot’strackholdandturnperformance.
4. ChangetheTRKtarget90degreesfromthecurrenttarget
Changetheheadingbugto90degreestotheleftorrightofcurrentheading.
1. Configureajoysticktocontroltheheadingbug.Thelabelabovethejoystickshouldread
(TRK)
2. Turnthejoystickeitherwayuntilthetrackbugreads90degreestotheleftorrightof
currentTRKtarget
3. TheaircraftshouldimmediatelybeginturningtowardthenewTRKtarget
5. CheckforROLLSLIPindications
ObservetheautopilotstatusindicatorontheTopBarwhiletheautopilotflies.Ifthe
bannerisshownfrequently,itisanindicationthattherollservoisslippingand
theservotorqueneedstobeincreased.Occasionalslipsduetoturbulenceareacceptable.
IffrequentROLLSLIPSareobserved,disconnecttheautopilotandincreaseROLLTORQUEby
10%(SETUPMENU>AUTOPILOTSETUP>ROLLAXIS>TORQUE).

Ifyouhaveadjustedtherollservotorqueto100%andarestillseeingfrequent
slips,youmayneedtotryahigherstrengthservo(e.g.,ifyouhaveanSV32
installed,tryswappingforanSV42).ContactDynonforassistance.
6. Checkifaircraftisslowtorespond
ObservethespeedatwhichtheautopilotrespondstochangesinTRKsetting.
Iftheautopilotseemstooslowtorespondor“sluggish”,disconnecttheautopilotandincrease
ROLLSENSITIVITYby2(SETUPMENU>AUTOPILOTSETUP>ROLLAXIS>SENSITIVITY).

AutopilotIn‐FlightTuningProcedures
SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA1‐5

Ifyouhaveadjustedtherollservosensitivitytoitsmaximumsettingandarestill
observingunacceptablyslowbehavior,contactDynonforassistance.
7. Checkifaircraftis“twitchy”inROLLaxis
Observeiftheflightcontrolstwitchexcessivelyorseemoverlyaggressive.
Ifitdoes,thisisanindicationthattheROLLSENSITIVITYneedstobedecreased.DecreaseROLL
SENSITIVITYby1(SETUPMENU>AUTOPILOTSETUP>ROLLAXIS>SENSITIVITY).Thereisno
needtodisconnecttheautopilotbeforemakingthischange.
Aftermakingthisadjustment,changetheTRKtarget90degreesfromthecurrenttarget,and
checkiftheautopilotovershootsthenewTRKtarget.IfTRKtargetovershootisobserved,
disconnecttheautopilot,increaseROLLGAINby0.2(SETUPMENU>AUTOPILOTSETUP>ROLL
AXIS>GAIN)andstartover.Otherwise,proceedtothenextstep.
8. CheckifaircraftovershootsTRKtarget
Observeiftheautopilotisovershootingorwanderingaroundthetracktarget.Theautopilot
shouldkeeptheopentriangleofthetrackbugcloselyalignedwiththesmall,magentaground
tracktriangle.
IfanovershootisobservedandyoumadearecentROLLGAINadjustment,disconnectthe
autopilot,increaseROLLGAINby0.2(SETUPMENU>AUTOPILOTSETUP>ROLLAXIS>GAIN)
andstartover
Otherwise,ifyouhavenotmadearecentROLLGAINadjustment:
1. IfROLLSENSITIVITYismaxedout,disconnecttheautopilot,increaseROLLGAINby0.2
(SETUPMENU>AUTOPILOTSETUP>ROLLAXIS>GAIN)andstartover
2. Otherwise,disconnecttheautopilot,increaseROLLSENSITIVITYby2(SETUPMENU>
AUTOPILOTSETUP>ROLLAXIS>SENSITIVITY)andstartover
9. VerifyacceptableautopilotROLLperformance
Atthispoint,theautopilotshouldbeappropriatelytunedintherollaxis.Performingnumerous
headingholdsandturnswillhelpverifythis.Oncesatisfiedwithautopilotrollperformance,this
procedureiscomplete.Ifautopilotrollperformanceisnotacceptable,refertotheRoll
Troubleshootingsectionofthisdocument.

AutopilotIn‐FlightTuningProcedures 
1‐6 SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA
PitchAxis–IASHold–In‐FlightTuningProcedure
Thisproceduretunestheautopilotpitchservoandtheflightcharacteristicsoftheaircraftin
indicatedairspeed(IAS)holds.Beforeexecutingthisprocedure:
1. TheautopilotcontrolsshouldbechangedtoEXPERTmode(SETUPMENU>AUTOPILOT
SETUP>AUTOPILOTCONTROLS)
2. TheALTbugshouldbesettoanaltitudemanythousandsoffeetabovetheintended
flighttestingaltitude.ThisistokeeptheautopilotinIASHoldmodethroughoutthe
procedure.
In‐FlightProcedure
Thefollowinglistisanoverviewoftheprocedure.Eachstepisdescribedinmoredetailafter
thelist,inflow‐chartandtextualformats.
1. Establishtrimmedlevelflightonafixedheading
2. EngagetheFlightDirector(FD)inTRKandIASmode
3. EngagetheAutopilot(AP)
4. AllowafewminutesofstableflightunderAPcontrol
5. IncreaseIAStargetby10knots
6. CheckforPITCHSLIPindications
a. Ifobserved,disconnectAP,increasePITCHTORQUEby10%andstartover
b. IfPITCHTORQUEisalreadysetto100%,contactDynon
7. CheckifaircraftlagsFDcommandbars
a. Ifobserved,disconnectAP,increasePITCHSENSITIVITYby2andstartover
b. IfROLLSENSITIVITYisalreadymaxedout,contactDynon
8. Checkifaircraftis“twitchy”inPITCHaxis
a. Ifobserved,decreasePITCHSENSITIVITYby1
b. IncreaseIAStargetby10knots
c. CheckifaircraftovershootsIAStarget
i. Ifobserved,disconnectAP,increasePITCHGAINby0.2andstartover
9. CheckifaircraftovershootsIAStarget
a. IfobservedandyouhavebeenchangingPITCHGAIN,disconnectAP,increase
PITCHGAINby0.2andstartover
b. IfobservedandyouhavenotbeenchangingPITCHGAIN
i. IfPITCHSENSITIVITYismaxedout,disconnectAP,increasePITCHGAINby
0.2andstartover
ii. Otherwise,disconnectAP,increasePITCHSENSITIVITYby2andstartover
10. Ifthisstephasneverbeenreachedbefore,proceedtostep11.
a. Otherwise,skipstep11andproceedtostep12.
11. DecreaseIAStargetby10knotsandreturntostep6.
12. VerifyacceptableAPPitchperformance
a. Ifunacceptable,refertoPitchTroubleshootingSection
b. Ifacceptable,procedureiscomplete

AutopilotIn‐FlightTuningProcedures
SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA1‐7
DetailedFlowchart

Figure2–PitchAxis–IASHold–FlightTestProcedure

AutopilotIn‐FlightTuningProcedures 
1‐8 SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA

DetailedExplanation
1. Establishtrimmedlevelflightonafixedheading
Youshouldstarttheprocedurebyplacingtheaircraftinlevelflight,inneutraltrim,onafixed
heading.Trytomaintainaconstantheadingduringtheprocedure.
2. EngagetheFlightDirector(FD)inTRKandIASmode
ToengagetheflightdirectorinTRKandIASmode:
1. EntertheAPMenu(MAINMENU>AP)
2. PresstheFDbutton
3. Pressbutton4,ROLL,thenbutton3,TRK
a. Itshouldbehighlightedandlooklike 
4. PresstheBACKbutton
5. Pressbutton5,PITCH,thenbutton3,IAS
a. Itshouldbehighlightedandlooklike 
6. Example:iftheFlightDirectorwereengagedinTRKmodeonaTRKof360degreesand
anIASof100,thetopbarwouldlooklikethis:
a. 
3. EngagetheAutopilot(AP)
Toengagetheautopilot:
1. EntertheAPMenu(MAINMENU>AP)
2. PressAP
3. TheAPandFDbuttonsshouldlooklike
4. AllowafewminutesofstableflightunderAPcontrol
Ensurethatyouarenotaffectingtheautopilot’scontrolofthepitchaxis,soyoucandetermine
theautopilot’sIASholdperformance.
5. IncreaseIAStargetby10knots
ChangetheIASbugto10knotsabovethecurrentIAStarget.
1. ConfigureajoysticktocontroltheIASbug.Thelabelabovethejoystickshouldread
(IAS).
2. TurnthejoystickclockwiseuntiltheIASbugreads10knotshigherthanitdidwhenthe
FlightDirectorwasengaged.
3. TheaircraftshouldimmediatelybegindescendingtowardthenewIAStarget.

AutopilotIn‐FlightTuningProcedures
SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA1‐9
6. CheckforPITCHSLIPindications
ObservetheautopilotstatusindicatorontheTopBarwhiletheautopilotflies.Ifthe
bannerisshownfrequently,itisanindicationthatthepitchservoisslippingand
theservotorqueneedstobeincreased.Occasionalslipsduetoturbulenceareacceptable.
IffrequentPITCHSLIPSareobserved,disconnecttheautopilotandincreasePITCHTORQUEby
10%(SETUPMENU>AUTOPILOTSETUP>PITCHAXIS>TORQUE).

Ifyouhaveadjustedthepitchservotorqueto100%andarestillseeingfrequent
slips,youmayneedtotryahigherstrengthservo(e.g.,ifyouhaveanSV32
installed,tryswappingforanSV42).ContactDynonforassistance.
7. CheckifaircraftlagsFDcommandbars
ObservethespeedatwhichtheautopilotrespondstochangesinIASsetting,andiftheaircraft
lagsbehindtheFlightDirectorcommandbars.
Iftheautopilotseemstooslowtorespondor“sluggish”,disconnecttheautopilotandincrease
PITCHSENSITIVITYby2(SETUPMENU>AUTOPILOTSETUP>PITCHAXIS>SENSITIVITY).

Ifyouhaveadjustedthepitchservosensitivitytoitsmaximumsettingandarestill
observingunacceptablyslowbehavior,contactDynonforassistance.
8. Checkifaircraftis“twitchy”inPITCHaxis
Observeiftheflightcontrolstwitchexcessivelyorseemoverlyaggressive.
Ifitdoes,thisisanindicationthatthePITCHSENSITIVITYneedstobedecreased.Decrease
PTICHSENSITIVITYby1(SETUPMENU>AUTOPILOTSETUP>PITCHAXIS>SENSITIVITY).There
isnoneedtodisconnecttheautopilotbeforemakingthischange.
Aftermakingthisadjustment,increasetheIAStargetby10knots,andcheckiftheautopilot
overshootsthenewIAStarget.IfIAStargetovershootisobserved,disconnecttheautopilot,
increasePITCHGAINby0.2(SETUPMENU>AUTOPILOTSETUP>PITCHAXIS>GAIN)andstart
over.Otherwise,proceedtothenextstep.
9. CheckifaircraftovershootsIAStarget
ObserveiftheautopilotisovershootingorwanderingaroundtheIAStarget.Theautopilot
shouldkeeptheopentriangleoftheIASbugcloselyalignedwiththeIASpointeronthe
airspeedtape.
IfanovershootisobservedandyoumadearecentPITCHGAINadjustment,disconnectthe
autopilot,increasePITCHGAINby0.2(SETUPMENU>AUTOPILOTSETUP>PITCHAXIS>GAIN)
andstartover
Otherwise,ifyouhavenotmadearecentPITCHGAINadjustment:
1. IfPITCHSENSITIVITYismaxedout,disconnecttheautopilot,increasePITCHGAINby0.2
(SETUPMENU>AUTOPILOTSETUP>PITCHAXIS>GAIN)andstartover

AutopilotIn‐FlightTuningProcedures 
1‐10SkyViewAutopilotIn‐FlightTuningGuide‐RevisionA
2. Otherwise,disconnecttheautopilot,increasePITCHSENSITIVITYby2(SETUPMENU>
AUTOPILOTSETUP>PITCHAXIS>SENSITIVITY)andstartover
10. Ifthisstephasneverbeenreachedbefore,proceedtostep11
ThestepsaboveshouldbeverifiedforincreasingIAStargetsanddecreasingIAStargets(IAS
climbsanddescents).
IfIASclimbshavenotyetbeentested,proceedtostep11.
IfbothIASclimbsanddescentshavebeentested,proceedtostep12.
11. DecreaseIAStargetby10knots
ChangetheIASbugto10knotsbelowthecurrentIAStarget.
1. ConfigureajoysticktocontroltheIASbug.Thelabelabovethejoystickshouldread
(IAS).
2. Turnthejoystickcounter‐clockwiseuntiltheIASbugreads10knotslowerthanitdid
whentheFlightDirectorwasengaged.
3. TheaircraftshouldimmediatelybeginclimbingtowardthenewIAStarget.

Atthispoint,returntostep6tore‐verifythesettingsabove.
12. VerifyacceptableautopilotPITCHperformance
Atthispoint,theautopilotshouldbeappropriatelytunedinthepitchaxisforIASholds.
PerformingnumerousIASclimbsanddescentswillhelpverifythis.Oncesatisfiedwithautopilot
pitchperformance,thisprocedureiscomplete.Ifautopilotpitchperformanceisnotacceptable,
refertothePitchTroubleshootingsectionofthisdocument.
