Bengtson Company Mister Mulligan User manual

Mr.Mulligan48”
Copyright©2005‐11M.K.BengtsonAllRightsReservedRev07/11
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MisterMulligan
R/CScaleModelInstructions
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CONTACTINFORMATION
TheMisterMulliganwasdesignedby
M.K.Bengtson
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ManufacturedandDistributedby:
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BengtsonCompany
e‐mail:[email protected]
WebSite:www.aerodromerc.com
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Mr.Mulligan48”Page2
Copyright©2005‐11M.K.BengtsonAllRightsReservedRev07/11
MISTER MULLIGAN
ThankyouforpurchasingtheMisterMulligan
modelforelectricflight.
THEMODEL
AsemiscaleadaptationoftheMr.Mulligan,this
modelisdesignedtobeeasytobuildandexcitingto
fly.
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POWERSETUP
MPJet25/35‐20brushlessmotorina4.4to1gearbox,
10KAN1050cells,Jeti30ampESC,APC11‐7Eprop.
R/CGEAR
Afourfunctionminireceiverandfourmicroservos
areallthatarerequired.
ModelSpecifications:
Morethan145lasercutparts
Scale: ~1/9
Channel: R/E/A/T
Wingspan: 48”
WingArea: 385sqin
Weight: 38oz
PowerSystem: MPJet25/35‐20brushless
motorina4.4to1gearbox
Prop:  11x7APCE
Wheels: Balsa&plywood,Neoprenefoam
tires
AirfoilType: Flatbottomed
Cowl: Vacuumformedcowlincluded
Spinner: N/A
Decals: Availableonwebsite
Covering: Oracover,SoliteorPolyspan
PrototypeBy:BrianAllen
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ReplacementcowlsAvailableonline
BUILDINGTHEMODEL
BEFORESTARTING
Anoteaboutthephotos:Thephotosweretakenofa
prototypeandthepartssuppliedmaylookslightly
differentfromthem.However,theconcepts
illustratedarethesame.
WINGS
WingConstruction
Pindown,overtheplan,thet/e,sparsandwingtip,
gluingasrequired.Addtheleadingedgestockafter
thebasicframeisdoneasthestockisinsertedina
rotatedfashion.Addthewingtipsandalignthe
fronttipalongthecenteroftheleadingedge.Sand
theleadingedgestocktoberoundedandmeetthe
ribs.
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WingConstructionpinneddown,overtheplan,thet/e,spars
andwingtip,gluingasrequired.
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Sandtheleadingedgestocktoberoundedandmeettheribs.
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Mr.Mulligan48”Page3
Copyright©2005‐11M.K.BengtsonAllRightsReservedRev07/11
FUSELAGECONSTRUCTION
Thefuselageisbuiltastwoseparateboxstructures,
thefrontsheetareaandtherearbuiltupsection,
whicharethenjoinedovertheplan.Thissystemnot
onlykeepseachstagesimple,butitalsohelpsto
ensureastraightfuselage.
BuildingoftheRightSideoftheFuselage
Beginbybuildingtworearfuselageframesoverthe
planandallowtodry.Selecthardbalsaorbasswood
forthelongerons.Buildoneframeandletitdry,
thenturnthisoverandbuildtheotherframeontop
ofit.Nowtheyshouldbothbeidentical.Usesome
thinpolyethylenesheetbetweentheassembliesto
preventthemstickingeithertotheplanortoeach
other.Note:theside,whichhasthebatteryhatch,
shouldbetheonlysidewiththediagonalwindow
member.(photobelowshowsitinbothsides).
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Note:theside,whichhasthebatteryhatch,shouldbetheonly
sidewiththediagonalwindowmember.(Photoshowsitin
bothsides).
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Jointhetwoframesovertheplanwithcrossbraces
andthetailskidmount.Check,checkandcheck
againthatthisandALLotherstructuresremain
perfectlyaligned.
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BuildingtheFuselage
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BuildingtheFuselage
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BuildingtheFuselage
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BuildingtheFuselage
TAILSURFACES
Layoutandgluepartsofthetailsurfacesonthe
plans.
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TailSurfaces

Mr.Mulligan48”Page4
Copyright©2005‐11M.K.BengtsonAllRightsReservedRev07/11
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TailSurfaces
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Jointheelevatorswiththe1/8”doweljoiner.Sand
thetailparts,roundingoffalledges.Don’taddthe
hornsorhingethesurfacesuntilaftercoveringis
complete.
LANDINGGEAR
Thelandinggearisfashionedfromtwosectionsof
1/8”musicwire.Thetwopiecesarelashedtogether
withbrassorcopperwireandsolderedsecurely.
Thegearisattachedtothefuselagebeforecovering.
Therearwireissecuredwith1/4”balsaandepoxied
inplace.
Thewheelpantsaremadefromlaminatedbalsaand
sandedtoshape.
Attachthepantsbysilversolderingastripof1/32ʺ
brass(1/4ʺby11/4ʺ)toa1/8ʺwheelcollarthendrilla
holeateachendofthestripfora2‐56SHCS.Settwo
2‐56blindnutsontheinsideofthepantsideand
screwthestripinplaceandattachittotheLGwith
thecollar
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LandingGear
COVERING
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Readytocover
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Anylightweightcoveringmaterialcanbeused.
OracoverorPolyspanmakeagoodchoice.This
prototypewascoveredinSolite.
MisterMulliganvinyldecalsareavailablefrom:
Callie Graphics
PO Box 2332
Edgewood, NM 87015-2332
[phone]
[email protected]
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WHEELS
Gluingtheplysidesonthe¼“balsacoremakesthe
basisforthewheels.Usethebrasshubfor
alignment.Epoxythehubsinplaceandadda
sufficientamountofepoxyaroundthebaseofthe
hubtoreinforcetheconnectionofthehubtotheply.
Plywoodreinforcinghubsareprovidedthatareto
slipoverthebrasstubingasshown.Alternatively,
gluinganadditional½”squarepieceofscrap1/8”
balsawithaholedrilledinthecentercanbe
substituted.Next,CAgluetheneoprenecording
togethertofroma“tire”.UsethinCAsparinglyas
theCAbondsveryaggressivelytotherubber.Press
theCAwettedendstogetherforaninstantbond.
Thebestwaytoaligntheendsistogluethemwhile
theyareinplaceonthewheel.Thenattachthetires
tothewheelsandCAinplace.AthinbeadofCA
aroundtherimmakesforasecuretire.

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Copyright©2005‐11M.K.BengtsonAllRightsReservedRev07/11
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Wheelassembly
INSTALLINGTHERADIOCONTROLGEAR
ServoBay
ItisaswelltogetthebulkofyourR/Cgearfittedat
thisstage,andalsothemotor.
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FittingR/CGear
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FittingR/CGear
BatteryTray
Afteralltheabovehasbeenplaced,mountthe
batterytrayandusethebatterypositiontobalance
themodelasshownontheplan.
ASSEMBLY
Wing
Thismodelwasdesignedtobeaone‐piecemodel.
Epoxythewingaccuratelyontothefuselage.Use5‐
minuteepoxyforthistask.Allowepoxytoset.
AddingDetailOfControlHornsOnThePushrod
Ends
Slipthecontrolhornsontothewirepushrodends
and,withboththeservosandthecontrolsurfaces
centered,gluethehornsintotheirslots.
Motormount
Therearetwomountsincluded.OneforaMini‐
Olympustype2.33:1gearboxandanotherfora
rolledplytubemountforgeneral‐purposemotor
mounting.Thefirsttypeisshownhere.
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Mini‐Olympustype2.33:1gearboxmount
Firstassemblethefrontofthefuselagewiththe
motormountplateandtheotherplatemadefrom
F1,F2andF3.UseM1andM2toconnectthesetwo
plates.Addthemotormountandtriangular
supports(mini‐olyversion)Add1/8”x1/16”bass
stringersasappropriate.Attachtheassemblytothe
fuselagebyslightlybendingthe1/8”balsasidesto
meet.Useshortsectionsofstringerstosecurethefit.
Thenaddbottomstringers.Sandtoshape.This
processmakesthecowlsectionalignmentautomatic.
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MotorMountDetail

Mr.Mulligan48”Page6
Copyright©2005‐11M.K.BengtsonAllRightsReservedRev07/11
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MotorMountDetail
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MotorMountDetail
BalanceTheModel
Balancethemodelatthepointshown.Itisbestto
positionthebatterytodothisoperation.
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FLYING
Prototypebuilder,BrianAllensays,”Chargedherup
(10cellKAN1050)andshewasoffthegroundin25
ft.Climbedouteversonicelyandrequiredacouple
ofclicksofupandaclockortwoofright(thinkI
haveaslighttwistinthewing).MytestpilotRon
flewherforfiveminutes,mostlyathalfthrottleand
helookedabsolutelysuperbintheair.Threwina
coupleofloopsandafewstallturnsforcʹsandgʹs.
Theplanetracksverystraightwithnotendencyto
dropofftoonesideandnosquirrellytraits.Rudder
isveryeffectiveatmaxthrow,elevatorokatabout
50%maxthrowandtheaileronsaresluggishsowe
probablyhavetoturnthemupabit.Planeisnot
twitchyatall.Poweroffglideisflatandslow,does
notwanttoslowdown,andseemstowanttoglide
forever.Landingwasatjustabitoveridleandhe
cameinniceandslowandflatforaperfecttwo
pointer.
Finalset‐up.AUWabout38ozusingMPJet25/35‐20
brushlessin4.4to1gearbox,10KAN1050cells,Jeti
30ampESC.TwoHS‐81ʹsforelevatorandrudder
(pull‐pullonrudder,pushrodonelevator)andtwo
HS‐55ʹsonailerons.APC11‐7Eprop.Solitewhite
covering.
Agreatflyingplane.Easytofly,tracksstraightand
lookssimplygreatintheair.“
Letthemodelgainaltitudeslowlyofftherunway.
Applyingtoomuchupelevatoratslowspeedsasks
forastall.Makeyourturnsgentlyastightturnsrisk
tipstallinginanymodel.Don’texpecttheelevatorto
makethemodelclimb.Thinkoftheelevatorasa
devicetochangetheattitudeofthemodel.Thewing
andairspeedultimatelymakethemodelclimb.
Oftendownelevatorappliedatstallingcanavoida
majorcrash.Themostimportantdetailsforproper
flightoperationsare:
CGlocation.Tail‐heavymodelsneverflywellorat
all.
Downandrightthrust
Straightandnon‐warpedwings.


MisterMulligan

CONTACTINFORMATION
Distributedby:
BengtsonCompany
E‐mail:[email protected]
WebSite:www.aerodromerc.com
