Bengtson Company Pfalz E1 36" User manual

PfalzE136”
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11
PfalzE136”

R/CScaleModelInstructions







CONTACTINFORMATION

ThePfalzE1wasdesignedbyM.K.Bengtson
PrototypebyIanEaston

ManufacturedandDistributedby:
BengtsonCompany
e‐mail:[email protected]
WebSite:www.aerodromerc.com

PfalzE136”Page1
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11
PFALZEI
ThankyouforpurchasingthePfalzEImodelfor
electricflight.
THEMODEL
AsemiscaleadaptationofthePfalzEI,thismodelis
designedtobeeasytobuildandexcitingtofly.


PFALZEI

ModelSpecifications
SPECIFICATIONS
Morethan90lasercutparts
Scale:  1/10
Channels: R/E/A/T
Wingspan: 36ʺ
WingArea: 230sqin
Weight: 17ozreadytofly
PowerSystem:GWS300CDgearbox
Prop:  11x8
Wheels: Balsa&plywood,Neoprenefoamtires
AirfoilType: Flatbottomed
Cowl:  Builtupbalsaandplywood
Decals: Availableonwebsite
Covering: LitespanorPolyspancovering

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.
IanEastonbuiltthePfalzEIprototype.
WING
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.
Don’tforgettoaddthe¼”crosspiecestousedlater
intheriggingwires.Theonesnearesttheleading
edgesareonboththetopandbottomofthewing.


Wingpanel,aileronnotattachedyet


Bothwingscomplete...

FUSELAGECONSTRUCTION
Firstthing,gluetheplywooddoublerstothebalsa
sides.Ifyouusewoodgluethebalsasideswillcurl
soweightthemdowntokeepflatuntildry.

IanmadesurethathemadeaLEFTsideanda
RIGHTside.


PfalzE136”Page2
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11

Frontʺbox”beingassembledandsquaredup

Thetworearframesoneatoptheother
Iangluedthebackofthecowltothefrontofthe
fuselage.Alternately,thecowlcanbeassembled
separatelyandattachedlater.Thecowlingisofbuilt
upconstructionusingC1,C2and1/32”plywood.


FuselageDetail


FuselageDetail
AssembleTheCowling
Constructfrontcowlringbygluing2C1’smaking
surethattheyareoverlappingcompletely.Toreduce
weight,theinnerC1maybeshavedorsandeddown
afterlamination.Maintaintheoutlineofthepartfor
properconstruction.
Wrapthestripof1/32”plyaroundformerC2,gluing
withcyanoasyouproceed.PutbothC1’sintothe
cowl.Glueitinsidethecowl.Oncealltheglueisdry,
trimandsandthefrontcowltoshapeandsandthe
cowloverall.

Separatelybuiltcowl
Thecowlshouldnowbesealed,sandedandprimed
untilnowoodgrainisleftshowing.Baby(Talcum)
powderincleardopemakesanexcellentbalsasealer.
Talcumpowdermixedinwhitegluemakesexcellent
fillerforgapsorgouges.Sanddownafteritdries.
AddingTheUndercarriagemounts
Rearframewasjoinedtothefrontbox.Crossbraces
addedtorear.Hardwoodcrossbracesareaddedto
thefrontandthetwotopformersadded.
Theundercarriageismountedusingbrasstubing
epoxiedintobasswoodmounts,whicharegluedto
cutoutsintheinternalplywoodsides.


PfalzE136”Page3
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11

Theundercarriagebeing:1.Assembled

2.Mounted

3.Doingwhatitʹssupposedtodo‐holdingthe
planeup!

TAILSURFACES
Layoutandgluepartsofthetailsurfacesonthe
plans.Don’taddthehornsorhingethesurfacesuntil
aftercoveringiscomplete.

Rudderbeingassembled
Secondphotoshowstherudderpostwithitshinge
thatmustbeinstalledbeforegluingthefrontofthe
rudderon.Theplancallsfora3/32ʺaluminiumtube
rudderpostinsidea1/8ʺaluminiumtubehinge.Ian
didnʹthaveany1/8ʺaluminiumtubehandysohe
usedapieceof1/8ʺnylontube.Niceandsmooth
motiononit.

Rudderpost(withitshingethatmustbeinstalled
beforegluingthefrontoftherudderon)

Rudder

PfalzE136”Page4
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11

Elevator
COVERING
Anylightweightcoveringmaterialcanbeused.
PolyspanwithdopeorMinwaxPolycrylicmakesa
goodchoice.Litespanisalsopopular.


CoveringDetail

Decaloutlinesforthismodelareavailableon
www.aerodromerc.com/decalsinAdobeAcrobatpdf
formatforprintingoutondecalpaper.Contactpaper
usedforkitchenshelfliningmakesexcellentdecals.
Printoutthedecalonpaper,gluewithagluestickto
thepaperbackingontheshelfpaper,cutthedecal
outwithanExactoknifeormicroscissors.Peeloff
thepaperandadheretoyourmodel.Useblack
materialforthecrossesandwhiteforthe
backgrounds.

WHEELS
Gluingtheplysidesonthe3/8”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.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.

Paperconesarecutout.Useaballpointpentoscore
eachlineonthebacktomakeanimpressionof
“spokes”Itishelpfultodothisoperationonapaper
tabletsothatthepenmakesagoodcrease.Foldthe
paperalongthecreaselinestoexaggeratetheraised
lines.Oneofthesectionsformingawedgeiscutout.
Makecutstothecenterofthecirclealongapairof
thespokes.Closethepapercutouttoformacone
andtapethejointinsidethecone.


WheelConstructionDiagram

Theinsideconesmaynowbeattachedtothewheels.
Theoutsideconesmaybeattachedathispointif
wheelcollarsaretobeused.Alternatively,after
installingthewheelsonthelandinggear,awasher
maybesolderedtoholdthewheelinplaceandthen
theconeisattached.Thismethodmakesaverynice
scaleappearance.


PfalzE136”Page5
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11
INSTALLINGTHERADIOCONTROLGEAR
ServoBay
GetthebulkofyourR/Cgearfittedatthisstage,and
alsothemotor.

Rudderandelevatorservosinstalled.
Rudderandelevatorservosinstalled.Ianplacedina
dummyrearsparsothathecouldfittheservo
supportuptoit‐actsasanextrabrace.
AileronServos
Aileronservosaremountedinwingandattached
withshortthreadedrodstotheailerons.Usea“Y”
wiringharnessconnectortowiretheservostoa
singleradioconnection.

Aileronservosaremountedinwingandattached
withshortthreadedrodstotheailerons
BatteryTray
Afteralltheabovehasbeenplaced,mountthe
batterytraymadefrom1/8”balsaandusethebattery
positiontobalancethemodelasshownontheplan.
ASSEMBLY
Wing
AligningWingPanels
Thewingpanelsareepoxiedontothefuselageand
joinedusingthesparbracemountedinsidethe
fuselage.Takecareatthisstagetoinsurethatthe
wingsarelevel.

FinishedModel
FittingTailSurfaces
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.
Fittingtheriggingwires.
UsestrongthreadorKevlarfishinglineorelastic
beadingcordingtosimulateriggingwires.Usesmall
screws,fishinghookeyes,straightpinheadsorsmall
eyeletstoattachthelines.These“wires”canadda
degreeofstrengthtoyourmodel.

RiggingDetail


PfalzE136”Page6
Copyright© 2005-11 M.K. Bengtson All Rights Reserved Rev 07/11
WindsockDatafiles#59“PFALZE.I‐E.VI“
publicationhasdetailsonplacementandmarkings.
Availableathttp://www.byrdaviationbooks.com/
Batteryhatch
Fashionabatteryhatchfrom1/32”plywood
BalancingTheModel
Balancethemodelatthepointshown.Itisbestto
positionthebatterytodothisoperation.
FLYING
ThemodelshouldROGongrass,pavementorhard
surfaces.


TaketotheAir
Thetailsurfacesshouldnotneedexcessivethrows.
Letthemodelgainaltitudeslowlyofftherunway.
Applyingtoomuchupelevatoratslowspeedsrisks
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:
1.CGlocation.Tail‐heavymodelsneverfly
welloratall.
2.Downandrightthrust
3.Straightandnonwarpedwings.

TheHunisaloft
HerearesomeexcerptsofIanʹsmaiden.
“Theaileroncontrolisabout1/2ʺtotalandIthinkit
needstobereducedjustalittlemore(formyreaction
timeanyway).CGisat1‐5/8ʺ(43mm),whichis3/8ʺ
behindtheplan.Ithinkitcouldbebroughtback1/8ʺ
to1/4ʺanditwouldbefine.Itdoesflyquitefastand
about2/3throttlehaditcruisingaroundandlooking
reallygood.Iʹmreallypleasedandlookingforward
tothenextflightwhichwillbeevenbetter.“
“ImovedtheCGforward1/4ʺbutIthinkIcould
bringitbacktothedesignpositionanditwouldbe
fine.“


CONTACTINFORMATION
Distributedby:
BengtsonCompany
e‐mail:[email protected]
WebSite:www.aerodromerc.com
