GREAT PLANES Spirit 100 User manual

INSTRUCTION BOOK
WARRANTY
Great Planes ModelManufacturing Co., Inc. guarantees this kit to befree of defects inboth
material and workmanship atthe date ofpurchase. This warranty does not coverany component
partsdamagedbyuseormodification. Inno caseshall Great Planes' liabilityexceedtheoriginalcost
of the purchased kit.Further, Great Planes reserves the right to change ormodify thiswarranty
without notice.
Inthat Great Planes has no control over the final assembly or material used forfinal assembly,
no liability shall be assumed nor accepted forany damage resulting fromthe use by the userof the
final user-assembled product.
By the act of using the user-assembled product the user accepts all resulting liability.
Ifthe buyer isnotprepared toaccept the liability associated with the useof this product, he
isadvised toimmediately return this kitinnewandunusedcondition tothe placeof purchase.
READTHROUGH THIS INSTRUCTION BOOK FIRST
ITCONTAINS IMPORTANT INSTRUCTIONS AND WARNINGS
CONCERNING THE ASSEMBLY AND USE OF THIS MODEL
SPT1P02

TABLE OFCONTENTS
INTRODUCTION ............................3
Precautions......................................3
Other Items Required ......................3
Supplies and Tools Needed ............4
Abbreviations..................................4
Types of Wood ................................4
Decisions You Must Make Now ...... 4
Die Patterns .................................... 5
Get Ready to Build ..........................6
TAIL FEATHERS ............................6
Build the Finand Rudder ................6
Build the Stabilizer and Elevator...... 7
Cut theHinge Slots.......................... 8
SPORT WING ASSEMBLY ............9
Build the Inner WingPanel ..............9
Build the Outer Wing Panel..............14
Join the Wing Panels ......................15
ADVANCED WING ASSEMBLY ....20
Build the Inner Wing Panel .............. 20
Build theOuter Wing Panel.............. 26
Join the Wing Panels ...................... 28
Install AileronServos ......................30
Install Flap Torque Rods.................. 32
Aileron / FlapAssembly ..................33
FUSELAGE ASSEMBLY ................34
Assemble Fuselage Sides ..............34
Frame-up the Fuselage ..................35
Assemble theCockpit/Canopy ........39
FINAL ASSEMBLY ........................41
Balance the Airplane Laterally ........41
Mount the Tail Surfaces ..................42
Final Sanding ..................................43
Covering..........................................43
Checking forWarps ........................43
Hinge the Control Surfaces.............. 44
Install Radio Gear ............................44
InstallThe Spoilers ..........................47
Control Throws ................................47
Control Surface Mixing .................... 47
Balance The Model ..........................47
FinalHookups and Checks ..............48
PRE-FLIGHT.................................... 48
Charge theBatteries ........................48
Finda Safe Place to Fly....................48
Range Check Your Radio................49
AMA Safety Code............................49
General............................................49
Radio Control....................................49
FLYING ............................................49
TrimFlights......................................49
Your First Hi-Start Launch ................50
FirstFlights ......................................50
FLAPS, CAMBER CHANGING AND
CROW MIXING ................................51
Launching ........................................51
Flying................................................51
Landing ............................................51
THERMAL FLYING..........................51
Facts About Thermals ......................51
Thermal Soaring ..............................52
Pointers forContest Flying ..............53
SLOPE SOARING............................ 53
Flying................................................53
Slope Landings ................................54
BALLASTING ..................................54
BUILDING NOTES ..........................54
PARTS LIST....................................55
2-VIEW DRAWING ..........................56
2

WARNING! THIS ISNOT A TOY!
Themodel you will buildfromthiskitisnot a toy'Itiscapable of seriousbodily harm and property damage. ITIS
YOUR RESPONSIBILITY AND YOURS ALONE - to build this kit correctly,properly installall R/C components and to
testthe model and flyitONLY withexperienced, competent help in accordance withall safetystandards and common
sense as set down inthe Academy of Model AeronauticsSafety Code Itis suggested thatyoujointhe AMA tobecome
properly insuredbeforeyouattempt toflythe model IFYOU AREJUST STARTING R/C MODELING, CONSULT YOUR
LOCALHOBBYSHOPORWRITETOTHEACADEMYOFMODELAERONAUTICSTOFINDANEXPERIENCED
INSTRUCTOR INYOUR AREA.
Academy ofModelAeronautics
5151 EastMemorial Drive
Muncie,IN47302-9252(800) 435-9262
INTRODUCTION
Congratulations! You now own a revolutionary sailplane
kit!A bold statement indeed, butno other sailplane kithas ever
been able to satisfysomanydesires. No matterwhat yourskill
level-rankbeginnerornationalsoaringchampionyouwillenjoy
this kit from the moment you start construction.
Thank you for purchasing theGreat Planes SPIRIT 100
sailplane.
Please inspectallparts carefully beforestarting to build!
If any parts are missing,broken or defective,or ifyou have
any questions about buildingor flyingthisairplane,please
call usat [phone] and we'll begladtohelp. If youare
callingfor replacement parts, please look up the part num-
bersandthekitidentificationnumber(stampedon theendof
the carton) and have them ready when calling.
PRECAUTIONS
1.You mustbuildthe plane according to the plans and in-
structions. Do notalter or modifythe model as doing somay
resultinan unsafeorun-flyablemodel In a few cases the plans
and instructionsmay differslightlyfrom the photos In those in-
stances youshould assume the plans and written instructions
are correct.
2.You must take time tobuild straight, true and strong.
3.You mustuse a proper R/C radio that is in first class
condition and meets orexceeds "1991 specs".
4.You mustproperly installallR/C and other components so
that the model operates properly on the ground and in the air.
5.You musttest the operation ofthe model before the firstand
each successive flighttoinsurethat allequipmentis operating,
andyoumustmakecertainthe model has remained structurally
sound. Be sure to check the nylonclevises often, and replace if
they show signs ofwear.
6.You mustflythe model only with the competent help ofa
well experienced R/C pilotifyou are notalready an experienced
and knowledgeable R/C pilot atthis time.
Note: We,asthekitmanufacturer,canprovideyouwith
atop qualitykit and greatinstructions,butultimatelythe
qualityand"flyabilily"ofyourfinishedmodeldepends
onhow you build it;therefore,we cannot in any way
guaranteetheperformanceofyourcompletedmodel,and
no representations are expressed or impliedas to the
performance or safelyof yourcompleted model.
Remember: Take yourtimeandfollow directions to end up
witha well-builtmodel thatisstraightand true.
OTHER ITEMS REQUIRED
0Radio having at least 2 channels (athirdchannel isrequired
for optional spoilers and a 4 channel radiowith5 servos is
requiredfortheadvanced wing)A computer radioor compa-
rableradiowithmixingcapabilitiesmaybeused toachievetotal
camber control and CROW typemixing
0Monokote or other coveringmaterial(2 rolls)
0Latexfoam rubber padding (1/4" thick)
0#64 rubber bands
0Heavy dutyhi-startorother launching device
0BB'sorlead shotfor balancing
0Thin butstrong thread - 30(2- 4lb fishingline works great)
0Pushrods (Sullivan#503 orequivalent)
0Hinges
The optional spoilers also require:
02 - 36"lengthsof 20-30 lbfishingline
02 - 36"lengths of1/8" plastic tubing
The advanced wingalso requires:
0Thin copper wireorsimilar(forwrappingflap linkage)
02 - 36"servo extensions (orequivalent)
02 or3 -12"servo extensions
3

SUPPLIES AND TOOLS NEEDED
02 ozThin CA Adhesive
02 07 MediumorThickCA Adhesive
02 5 oz 5-MinuteEpoxy
0Hand orElectric Drill
0DrillBits1/16",3/32", 1/8",5/32",11/64,13/64"& 1/4"
0Sealing Iron
0Heat Gun
0Soldering Iron (Advanced wing)
0Razor Saw
0Hobby Knife,#11Blades
0Pliers
0Screw Drivers
0T-Pins
0Assorted Rubber Bands
0Straightedge
0Drafting Triangle
0MaskingTape
0Cellophane Tape
0VinylTape
0Sandpaper (coarse, medium, fine grit)*
0T-Bar Sanding Block (orsimilar)
0Waxed Paper
0LightweightBalsa Filler
02-56 Tap, Tap Wrench
01/420Tap (for bolt on wing option)
0Dremel Moto Tool or Similar (optional)
*NOTE:Onour workbench, we have four 11T-Bar sanders,
equipped with#50,#80, #100 and #150-gnt sandpaper This
setup is allthatisrequiredfor almostany sanding task We also
keep some #320-grt wet-or dry sandpaper handy for finish
sanding before covering
COMMON ABBREVIATIONSUSEDINTHIS
BOOK AND ON THE PLANS:
Elev= Elevator
Fuse= Fuselage
LE= Leading Edge (front)
Lt = Left
Ply= Plywood
Rt = Right
Stab= Stabilizer
TE= Trailing Edge (rear)
"= Inches
Tri= Triangle
TYPES OF WOOD
DECISIONS
YOU MUST
MAKE NOW
WING CONFIGURATION
TheSPIRIT 100kithas twodifferent wing options
The SPORT winguses the Selig3010 airfoil,has
optionalspoilers andisrecommendedfornovicesailplane
pilotsThis wingiseasy tobuild,easy to flyand offers
great all-around performance without requiring expen-
sive radio equipmentThe spoilersarc highlyrecom-
mended as they make itmucheasier to land in smaller
spaces orto lose altitudein a safe controlled manner
The ADVANCEDwingutilizesthe SeligDonovan
7037airfoilalong withflaps and ailerons to provide
incredible thermal soaring performance This wingis
designed to be builtwithpolyhedralwhichhas been
foundto work great - enablingthe Spirit100to thermal
verytightlyin low levelthermals "Straight wing"
enthusiasts can cuttheir own polyhedral braces to elimi-
natethepolyhedraliftheydesireComputerradiosand
radios withmixingcapabilitiescan be used to obtain
totalcambercontrol(thewholetrailingedgewillraiseor
lower together)and CROW (theaileronsraiseabout75
degrees and theflaps drop almost90degrees) The SD
7037airfoil,combined withtotalcambercontrol, gives
youa sailplane thathas an incredible L/D, yet willreally
slow down and floatwhen thewhole trailingedge is
droppedabout3/32 Thisfeatureenables the Spirit 100
to out thermal any other plane in itsclass
RUBBERBANDOR BOLT-ON WING
Parts are included to buildcither a rubber band on
wingor a bolt-on wing held in place withfour 1/4-20
nylonbolts
The rubber band onwingis easier to buildand will
absorb hard landingsbetter sowe recommend ittor less
experiencedbuilders
Theboltonwingoffers lessdrag and moreprecise at-
tachment It isrecommended for the advanced wingand
the serious contest flyer
4

DIEPATTERNS
SPT1W014 PER KITSPT1F012 PER KIT
SPT1W01
BALSA 1/16-X 2-6/8" X 1/8"
SPT1W022 PER KIT
BALSA1/8"X 4"X 24"
BALSA 1/8"X 2-6/8"X 16"
SPT1W032 PER KIT
BALSA 1/16"X 2-5/8"X 16"
SPT1F03
2PER KIT
BALSA 3/32-X 3-1/2"X 27"
SPT1F05
1 PER KIT
SPT1W04
2 PER KITBALSA 3/32"X 3"X 22"
SPT1W091 PER KIT
BALSA 1/16"X 2-6/8" X 16-
SPT1W06
4 PER KIT
SPT1F08
1 PER KIT
PLY 1/8" X 4- X 12"
PLY 1/16"X 4-1/2"X 12"
SPT1W112 PER KIT
BALSA 1/16"X 2-6/8" X 16"
SPT1W06
2 PER KIT
PLY 1/16"X 4-1/2" X 18"
BALSA 1/8"X 2-6/8"X 16"
2PER KIT
SPT1F07
WING SADDLE TRIPLER
SPT1W07
2 PER KIT
REARFUSE DOUBLER
BALSA 3/32"X 2-6/8"X 16"
SPT1F17
BALSA 1/16"X 2-6/8" X 16"
SPT1W08 2 PER KIT
1 PER KIT
PLY 1/8" X 3" X 16"
1 PER KIT
BALSA 1/16"X 2-6/8"X 16"
SPT1W211 PER KIT
SPT1F04
PLY 1/8" X 3"X 21"
SPT1W10
2 PER KIT
BALSA 1/16"X 3"X 18"2PER
KIT
SPT1F02
PLY 1/32"X 3-3/4" X 12"
SPT1W221 PER KIT
BALSA1/8"X 3-1/2"X 30"
SPT1F06
1 PER KIT
BALSA 3/32" X 3"X 30"PLY
1/8" X 4- X 12"

GET READYTO BUILD
NOTE: Itwillbe helpfultobuild onapiece of"Celotex"orother
semi-soft(and flat)surface, intowhichyoumay easily stickpins
to firmlyhold down the parts while building,and to avoid warps.
Tips (SPT1S02) to maketheRudderand FinFramework.
Noticethatthefinleadingedge extendsdownintothe fusesocut
itlong enough to extend past the fusebottom.Itwillbetrimmed
off flush with the fuse bottom later Pin these pieces in place on
the plan and gluethepartstogether usingthinCA glue.
CAUTION:Do not gluethe finto therudder! Cutthe notch
near the back ofthe finbottom soitwillfitover the stab.
D1.Unroll the plan sheet. Re-roll theplan inside out andlet
ituncurlwhileyouread throughthisinstructionbook. Thiswill
help the planlayflatand youtogetacquainted withthe building
process. NOTE,: Because there are several options to con-
sider whenbuildingthe SPIRIT100, you should read the
instructionbook throughbefore buildingand then go back
and cross off the steps you won't use to buildyour model.
D2. Remove allparts from the box.As you do, figureoutthe
nameofeach part bycomparingitwiththeplans and theparts list
atthe back ofthisbook.Writethepart name orsizeon eachpiece
toavoidconfusionlater.Usethe die-cutpatternsshownonpage
5toidentifythedie-cutpartsandmark them.Ifanyofthedie-cut
parts arc difficultto punchoutduringconstruction,do notforce
them!Instead,firstcutaroundthepartswithahobbyknife.After
punchingout the die-cutparts, use your T-Bar orsanding block
to lightlysandthe edges to remove any die-cuttingirregularities.
D3.Fromthe1/8"x 1/4"x 30"BalsaTail RibSticks(SPT1S04),
cut the "ribs" to fit inside the rudder and fin framework, and glue
them inplace. Cutthegussetsfromthe 1/4"x3/4" x 24" Balsa
TailTips Stick(SPT1S02) and gluethem in place.
"TAILFEATHERS"
BUILD THE FIN AND RUDDER
You'llneed the following pans:
SPT1S011/4"x 1/2"x 30"Balsa Tail Frame
SPT1S021/4"x 3/4" x 24" Balsa Tail Tips
SPT1S041/8"x 1/4"x 30"Balsa Tail Ribs
D1.Tape orpin the plandown to your flatwork surface. Tape
apiece ofwaxedpaper over the finand rudder portion ofthe plan
(soyoudon'tgluethe parts to the plan).
D4.Remove the finand rudder assemblies from the plan and
examine them for any openorbad joints.Fill any gaps with
mediumor thickCA,then useyoursandingblock withmedium
gritsandpaper to sand bothsides of the frameworksmooth.
D2. Usingthe planas a guide,cutpieces of 1/4"x 1/2"x 30"
BalsaTail Frame (SPT1S01) and 1/4"x 3/4" x 24"Balsa Tail D5.Carefully draw a centerline allaround the edges ofthe
rudder. This willhelp to maintain symmetry when sanding.
6

D6.Usinga sanding block and coarse (50or 80-gnt) sandpa-
per, sand the leadingedge of the rudder tothe V-shape as shown
on the plans (asmall razorplane worksgreat for initialshaping).
Sand the three remainingedges to a smooth rounded shape.*
Sand the top and the leading edge of the finto a nice rounded
shape. The leadingedge ofthefinextends down through thefuse
soyoudon'tneed to sand below the edge of the finbottom.
NOTE: The trailingedge ofthe FIN must remain square, do
not sandit!
D7, Cut two6" lengthsof1/4"Balsa Triangle(BAL141)and
gluethem along the bottom of the fin.The bottom edges of the
triangle shouldbe flushwiththe bottomofthe fin.Sand the
triangle stock to blend withthe leadingand trailingedges of the
fin.Also, cut or sand the bottomofthe trianglestockto matchthe
notch in the 1/4"balsa finbottom.
*MAXIMUMPERFORMANCE TIP - Sandboth sides ofthe
rudderto ataperasshownon theplans. Thisrequiresa littlemore
work butwillhelpto reduce drag and thusincrease performance
ofthe sailplane.
BUILD THE STABILIZER AND ELEVATOR
You'll needthe following parts:
SPT1S01 1/4"x 1/2"x 30"Balsa Tail Frame
SPT1S02 1/4"x 3/4"x 24" Balsa Tail Tips
SPT1S03 1/4"x 1"x 15"Balsa Stab Center Piece
SFT1S04 1/8"x 1/4"x 30" Balsa Tail Ribs
SPT1S051/4"Balsa Tapered Elevator
D1.Tape waxed paper over the stabilizerdrawing onthe
plan. Cutthe leadingand trailingedges from the 1/4"x 1/2"x
30"Balsa TailFrame Stick(SPT1S01). Cutthe lips fromthe
1/4"x 3/4" x 24" Balsa TailTips Stick (SPT1S02) and cut the
centerpieces fromthe 1/4"x 1" x 15" Balsa Stab Center Piece
Stick (SPT1S03). Pin these pieces inplaceover theplan and add
thin CA toeach joint.
D2.Cutthe "ribs"from the 1/8"x 1/4"x 30"Balsa Stick
(SPT1S04)and glue them in place.
D3.Pin ortape the 1/4"Balsa Tapered Elevator(SPT1 S05)
inplacebehindthe stabanduse yourrazorsaw tocut theendsoff
to match the angle ofthe stab lips.
D4. Remove the slab fromihc planand examine itfor any
open orbadjoints.Fillany gaps withmediumorthickCA, then
7

use yoursandingblock withmediumgritsandpaper tosandboth
sidessmooth.
D5.Carefully draw a centerline all around the edges ofthe
stab (this willhelp to maintain symmetry when sanding).
CAUTION!!!:You must useextreme care when cut-
tinghingeslots witha hobby knife,to avoidcutting
yourself!Ifthe balsa part breaks whileyouare
pushingontheknife,thebladecouldgointoyourhand
before you know it!A good precaution isto wear
leathergloveswhileperformingthefollowingsteps.
D6.Tape theelevatorto the stabwithmaskingtape and using
asandingblockwithcoarse (50 or 80-grit)sandpaper, sand the
leadingedge of the stab, the stab tipsand the elevator tips toa
smoothrounded shape. The tipsofthe elevatorshouldblendin
nicelywiththestabtips.NOTE: The trailingedge ofthe STAB
must remain square, do not sand it!
D7. Remove the elevator and draw a center linedown its
leadingedge. Useyoursandingblock tosand thesame V-shape
asyoudidontherudder.Thetrailingedgeshouldalsobesanded
to a smooth rounded shape.
CUT THE HINGESLOTS (Donot glue)
NOTE: Due to the many types ofhinges available and the fact
thateverybody seems to have theirown favorite, we did not
includehingesinthiskit.We can however,highlyrecommend
the "laminated"typehingesthatyouinstallwiththinCA,Our
R&Ddepartmenthas thoroughlytested these hingesand found
them to be easy toinstalland sufficientlystrong and durablefor
thistypeof airplane.However,as the kitbuilder,youare
remindedthatyouare ultimatelyresponsible for the structural
integrityof youraircraft. Ifyouare notconfidentusingthistype
ofhinge,please feel freeto use your favoritehinge.The hinge
slotsforthistypeof hingecan be cutnow oryou can wait and cut
them alterthesurfacesare covered.
Thefollowinginstructionsexplainhow to installmosthinges.
D2. Cutthe hingeslotson the accurate centerlineswhich
you previouslydrew usingahobbyknife.(The recommended
hingeslottingtechniqueislistedbelow).
A. Begin by carefullycuttinga very shallowslitat the
hingelocation. This firstcutisto establish your cutin the
rightplace, soconcentrate onstaying on the centerline and
don'tcuttoo deep!
B. Make three or fourmore cutsin the same line,going
slightlydeepereachtime.Asyoumake theseadditional
cuts,workon goingstraightintothewood. Continuethis
process while"wiggling"the knifehandleforwardand
backward untilthe bladehas reached theproper depthfor
the hinge.
C.Trial fitthe hinge intothe slot. If the hingeis difficult
to pushin,re-insertthe knifeand move itback and forth in
the slota fewtimesto enlarge the slot.
D1.Lay the rudder and elevators onthe plan and mark the
hingelocations.Place the rudder againstthe finTEand transfer
the marksover tothe fin.Place the elevator against the stab TE
and transferthe marksover to the stab.
D3.Insert the hinges intothe slots and trialfitthe rudderand
elevatorin place onthefinand stab.Do notgluethehingesuntil
afteryouhavecoveredthemodel. Hingegluinginstructionsare
includedlater.
IF YOU HAVEDECIDEDTO BUILD
THE ADVANCEDWINGPLEASE
SKIPTO PAGE20.
8

SPORT WING ASSEMBLY
D1.Tape the plan to your flat work surface and cover the
wingdrawingwithwaxed paper. NOTE: Ifyour work space
is limited,youmay cutthe wingdrawings apart from the rest of
the plans.
D2. The Shaped WingLeading Edges (SPT1W14) are fas-
tened togetherby thin strips ofbalsa. Separate them by carefully
cuttingbetween the LE'S,withthe kniferestingagainstthe LE
as a guide.Do notcutverticallyat the edge ofthe LE oritwillend
uptoo narrow.Allowthe cutto followthe crosssectional shape
ofthe LE. Sand awayany excess balsa thatremains alongthe
edges usinga sanding block with100-grit sandpaper, butdo not
"square off the edges.
TWOWARPEDSPARSINSTALLED
THISWILL WILL RESULTINA
STRAIGHTWING
D4. Punch out the two RibGaugePieces (SPT1W22) and
assemble them usingCA.Noticethatone end of thegaugeis
slanted at a 3-1/2 degree angle for positioningthe end ribs.The
other 3 ends areperpendicular and can beused to keep parts 90
degrees tothe work surface.
BUILDTHE INNERWINGPANEL
You'll needthe following parts:
SPT1W01 1/16" BalsaDC WingRibs- W2S, W2SS
SPT1W02 1/8" Balsa DC WingRibs- W1S,W3S
SPT1W03 1/16"Balsa DC WingRibs - W4S, W6S,
W7S, W9S
SPT1W041/16" Balsa DC WingRibs - W2SA & B,
W5S,W8S,W10S
SPT1W12 1/8"x 3/8" x 30"Basswood Inner Spars
SPT1W14 Shaped Balsa Leading Edge
SPT1W15 11/32" Balsa Notched Inner TE/Flap
SPT1W20 1/16" x 3" x 30Balsa WingBottom Sheet
SPT1W22 1/8"PlyDC Clamps and Gauges
SPT1W24 1/16"Balsa ShearWeb Pack (26)
D1.Locateall the SPT1W01,SPT1W02, SPT1W03, and
SPT1W04 die-cutribsheets. Check tomake sureyoucan read
the embossing oneach rib.Ifyou can not, use the diepatternson
page 5 todetermine the rib#'s and mark the #'s onthe ribs.
Carefullypunch outallthe die-cutbalsa wingribs.Sand the
edges slightlyto remove any die-cuttingirregularities.
TWOWARPED SPARSINSTALLED
THISWAYWILLRESULTINA
WARPEDWING
D3. Before usingthe1/8"x 3/8"Basswood Spars, examine
them carefullyfor possibleimperfections. Look for knots,soft
spots, diagonal grain and any other imperfections. If possible,
positioneach sparsotheimperfectionsareontheouterhalfofthe
wingpanel (toward the lip), where they willbe least affectedby
highstress. Ifthe sparsare warped slightly,"balance them out"
by installingthe warped spars in oppositedirections (seesketch).
NOTE: If you are installingspoilers,cut out the
embossed area on the two W2SS ribsand make sure
youinstalltheseribsintheproperlocations.Youcan
alsoreferto theplansand markoneach ribwhere the
spoiler tube willbe. Drilla 1/8" hole in the proper
ribs and make sure they getinstalledin the correct
places.
9

D2. Sonthrough the three 1/16"x 3"x 30"Balsa Wing
Sheeting (SPT1W20) and pickoutthe twosheets that most
closely match each other in weightand grain.These willbe the
bottom sheetingfor the inner wingpanels. Check tomake sure
the two"bottom" sheets have at least one straightedge. If' not,
use a metal straightedge to cutaslittleaspossible off ofonelong
edge to make itstraight.
DD 6.Place six W2S and twoW2SS ribs (SPT1W01) on
the sparin theirapproximatepositions,work theribsintothe
notches on the trailing edge but do not glueanythmgyet.NOTE:
The W2SS ribs should be installed where the spoiler willbe
located.
NOTE: Follow the steps with twocheck boxes
to buildthe RIGHT wing panel, then repeat
these steps to buildtheLEFT wing panel.
DD 7.Make suretheribsare properly positionedaccord-
ing to the plans and gluethem to the spar usingmed.or thickCA.
Do not purposelygluethe ribstothe sheeting yet. Use the
square end oftheribgauge to keep theribsperpendiculartothe
work surface.Hold the TE and the ribsflatagainsttheplan. With
the ribs inserted fullyintothe notches, add a drop of thinCA to
eachjoint.
DD 3.Glue oneofthe"InnerBottom" wing sheets tothe
edge of an 1/8"x3/8"x30"BasswoodInnerSpar (SPT1W12)
usingthefollowingprocedure. Withthespar in positionon the
plan,holdthe straightedge ofthebottom wingsheet upagainst
it.Starlingabout 9 inchesfromthe "root" end (where the second
W2Sribwillbepositioned),add thinCAalong thejoint.Besure
to hold both the spar and thebottom wingsheet flatagainstthe
worksurfacewhilethegluecures.Gluea5" -6"sectionatatime
untilyou get within4" ofthe other end (wherethe last W2S rib
willbe installed). Do not glue the two ends yet assomeofthe
sheeting willbecut away later.
DD 4. Alignthe bottom spar/wing sheet assembly with the
"Inner Panel" drawingon the plan and pinitin place. This
assemblywillbealittlelong butjustcenter itover the innerpanel
drawing.
DD 8.Trial fitthe Top 1/8"x 3/8"x 30"Basswood Inner
Spar (SPT1W12)intothenotches in theribsbycarefullypushing
thesparcompletelydownintothenotches.Makesurethetopspar
islineduplengthwisewiththebottomspar. Removethesparand
apply med. or thickCA to thenotches. Replace thespar and make
sure the spar islevel withthe front half ofthe ribsothe sheeting
willlieflatonthe spar.
DD 5.Pin one ofthe 11/32"Balsa Inner TrailingEdges
(SPT1W15) to the plan,liningupthe notches in the TE wilh the
notches onthe plan. Use a couple ofW2S ribs to correctly space
theTE behind thespar. Ifthe notches are offa littlefrom the plan
itisdue to themoisturecontentoftheair.Justlineuptherootend
oftheTEandspacetheribs accordingtotheTE,nottheplans.
DD 9.Position a 1/8"x 3/8"x 23-1/2" Basswood Outer
Spar (SPT1W 13)under the frontedge of the leadingedge sheet
to hold itup against the frontof the rib.Use weightsor pinsnear
thespartoholdthepanel flaton thework surfaceduringthisstep.
Apply Am CA to glue the sheeting to the ribs.The outerspar is
10

shorterthan thepanel so youwillhave to do approx halftheribs
then move thespar downto do the rest of the ribs
DD 10Unpinthe wingpanel from the work surface and
hold a metal straightedge againstthe front ofthe ribs Allow the
panel to tipupso thefrontedge of the sheeting is flaton thework
surface and use an Xacto knifeto carefully cutthe sheetingoff
flushwiththe from edge ofthe ribs Use a sanding block to
remove any "bumps" butbe careful not tosandany dips intothe
sheeting or sand the ribs
DD 11Position a Pre-Shaped Balsa LeadingEdge
(SPT1W14) inplaceagainstthe frontoftheribsNOTE: 1these
leadingedges areNOTsymmetrical.Referto one ofthe section
viewsontheplansto determinewhichway they shouldbe
installed Carefullyhold the leading edge against one of the end
W2S ribsand notethatitiswiderthanthefrontof the ribThis
isbecausethe1/16balsaleadingedgetopsheetingwillbeadded
later Alignthe lowersurfaceoftheleadingedge withthebottom
ofthe lowerLE sheet and glueitinplacewitha dropof thinCA
Alignthe other end of the leadingedge withthe bottom of the
opposite end W2S and glueitwitha drop of thinCA Go down
the lineand gluethe remainingribstotheleadingedge, one at a
time, soyou canmake sure theyare alignedMake surethe LE
sheetingisflushwiththebottomof theLE and add CA between
the ribsDo notgluethe sheetingto theLE past the lastW2S ribs
yet.
IMPORTANT- MAKESURETHEWING
PANELREMAINSABSOLUTELYFLAT
DURINGTHE NEXTSTEP!
DD 12Locate the 1/16" Balsa Shear Webs (SPT1W24)
Trial fitone of the websinplace betweenthe firstand second
W2S ribsGluethe shear web in placeonthebackof thespars
using med orthickCA The web should be pressed downagainst
11

the work surface and tightlyagainstthe spars. It is important to
do a goodjobofgluingthese in place asthey are responsible for
most ofthe wing'sstrength.Also glueashear web to the frontof
the spars. Because ofthe 1/16" bottom sheeting, the frontshear
webs willextendabove the top spar, butjusttrim them offafter
youhave installed all the webs. C-1and C-2 Clamps (SFT1W22)
can be used to help hold the webs in place whilethe gluecures.
Installtheremainingbalsashearwebs. They continueonboth the
front and the backofthe sparall the way tothe last W2S Rib.
DD 13.Punch out the five1/16"Ply WingJoiner Lamina-
tions(SPT1W09)andlightlysandtheedgestoremoveanyrough
spots. Locate the 1/16"AluminumWingJoinerBlade
(ALUM008). Clean thealuminumjoinerwithalcohol toremove
any oily residue and sand each side withcoarse sandpaper to
scratchthe surface and help the glue stick.
I—II—I 14. Use either epoxy ormed. or thick CA to glue one of
the 1/16"plylaminationstothe 1/16"aluminumblade. Applyas
much pressure (clamps, clothespins, weights,etc.) aspossible
whilethe glueis curing and besure toaccuratelyline upthe two
pieces. Gluetwomore 1/16"plylaminations toeach side of the
now1/8"thick joiner using the sameprocedure.
DD 15.Sandthe top edge ofthe laminated joiner flatand
gluethe Die-Cut1/16"Ply Joiner Shim (SPT 1W09) in place on
top ofthejoiner.Sand the edges ofthe finished"wingjoiner"to
remove any glue globs and toround off the comers.
the panel and mark approximately1/32"in front ofit.Now cut
along thislineand the spartoremove a 3/32" widestripofwood
fromtherootofthepanel tothefirstW2Srib.Scrapeoffanyglue
orbalsa wood thaimay stillbe on thespar withtheback edge of
an Xacto knife.IMPORTANT- Be sure to get the edge ofthe
spar"clean" as a good gluejointbetween the sparand the joiner
box side is very important.
DD 17.Testfitthe joiner box sides in place. Oneside
should be installedonthe front ofthe spars and theother onthe
back. Noticethat one end of the side isslanted at a 3-1/2 degree
angle. This end mustbeat the wingcenterline.The "long" edge
ofthe sideshouldbe at the bottom.Use the C1 Clamps
(SPT1W22) tohold the sides inplaceand testtitthewingjoiner
intotheboxformed. This "box"willbereferred toasthe"joiner
box". The spars shouldfitsnuglydown on the wingjoiner,but
make sure thejoineris notholdingthe spars above theirnormal
position.Ifit isremovethejoinerand sand ituntilitfitscorrectly.
DD 18.Remove the clamps and thejoinerand apply a bead
ofepoxy along the spar edges. Installthe joinerbox sides and
hold them inplace withtheC1 clamps. A good gluejointis
importantherebutbecarefulnotto getanyexcess glueinsidethe
box formed by these sides. Insert thejoinerintothe box and then
remove ita couple of timestoscrape any excess glueout ofthe
box. Wipe any glueoff the joiner before itcures.
DD 16.Locale twoofthe 1/16" Ply Joiner Box Sides
(SPT1W11) thathave an"S"embossed on them. Hold oneofthe
sides in place onthe frontofthe spars at the "root" (inner) end of
DD 19.Sandthe edges ofthe joinersides to remove any
sharp comers or glueglobs. Wrap the entire joinerbox with a
strongthread(2-4lb.fishinglineworkswell).Thethreadshould
12

be tightlywrapped and closely spacednear the root end but itcan
be spaced farther apart asyouget closer to the W2S ribDo not
allowthethread to overlap or itwillbuildupin thicknessand the
top sheetingwillnot seat properly on thespar When finished
wrapping, soak the entire thread withCA HINT- It willtake at
least 15feet of thread to properly wrap eachjoinerbox
DD 20With the wingpanel over the plans for reference,
glueW2SA and the W2SB (SPT1W04) in place
DD21.Locatethe"odd"(see p10, step2)1/16"x 3" x 30"
Balsa Sheet (SPRTW20) and cut off three pieces 3"long Slide
oneofthesheets inplacebehindthejoinerbox and glueitinplace
withmed orthickCA Cut anotherpiece to fitbetween the first
sheetand the TE and glue it in place Save the remaining pieces
for the other wingpanel
these ribs into place NOTE: If youaregoingto install spoilers,
youshoulddrill1/8" holesintheremainingW1SBribsforthe
tubingbefore gluingthem in place.
DD 23 Position the1/4"xl-l/8"x2-7/8" PlyFront Wing
BoltPlate (SPT1W27) nextto the templateontheplanUse the
measurementsgivento mark where to drillthe holeDrilla
13/64hole at the mark Notice that the hole isoff-center
SKIP THIS STEP IF YOU ARE BUILDING A RUBBER
BANDONWING.
DD 24Test fitthe front wing bolt platein place againstthe
W1SA ribIt should be centered upand down on the LE and it
should be parallelto the work surface,withthehole off-center
towards the root ofthe wingSand itifnecessary to achieve a
good fitbetween the LE and thejoinerbox When satisfiedwith
the fit,securely glueitin place witheithermed or thickCA or
epoxy Add 1/4"balsa triangle along the sparand a Filletofglue
along the LE.
DD 22 Punch out threeW1SA ribs and three W1SB ribs
(SPRTW01) and test fitthe end W1SA and W1SB ribsinto
position A littlesandingmay be necessary to make them fit
properly Theyshouldbetiltedin (towardsthetip) atthetopusing
the slantedendoftheribgauge toachieve the correctangle Glue
DD 25Glue the remaining W1SA andW1SB ribs in place
The secondW1SA shouldbeagainstthewingboltplate Glue the
bottomsheeting to each of these ribsand cut offany excess
sheeting, spars, LE, orTEflushwiththe end W1Srib
13

BUILDTHE OUTER WING PANEL
You'llneed the followingparts:
SPT1W03 1/16"Balsa DC Wing Ribs - W4S,
W6S, W7S, W9S
SPT1W04 1/16" Balsa DC WingRibs - W2SA & B,
W5S,W8S,W10S
SPT1W13 1/8" x 3/8" x 23-1/2" Basswood Outer Spars
SPT1W14 Shaped Balsa LeadingEdge
SPT1W16 11/32" Balsa NotchedOuter TrailingEdge
SPT1W23 7/8" Shaped Balsa WingTip Block
DD 1.Lay one ofthe Balsa Outer TrailingEdges
(SPT1W16) inplace over the plan. Alignthe notchesin the
trailingedge withthe notches on the plans and pinitin position.
NOTE: Theexcess TEwill later becut off and used to
makethe spoiler.
T-Pins
into the notches untilitis flushwiththe top ofthe ribs. Remove
the spar and applymed or thickCA to the notches. Replace the
spar and allow the glueto cure.
Work Surface Spar
DD 2. "Crosspin" one ofthe 1/8"x 3/8"x 23-1/2" Bass-
wood Outer Spars (SPT1W13) in place.
DD 3. Locate the 1/16" (W4S - W10S)Outer Panel Ribs
(SPT1W03 & SPT1W04). Gluethe ribsin place withmed. or
thickCAatthe sparJointandadropofthinCAatthetrailingedge
joint.Use theribgauge tokeep theribsperpendicular tothework
surface.
DD 5. Lay a Pre-Shaped Balsa Leading Edge (SPT 1 W!4)
over theLEADINGEDGE TEMPLATEon theplans.Usethis
drawingasa reference to cut the reliefnotches. It isa good idea
to cut theleadingedge approximately1/4" longeron both
endstobeonthesafeside.ItcanbetrimmedtothecorrectIength
after itis installed.The reliefnotchesdo notneed togo alltheway
through the leading edge butshouldgo within1/8"of doingso.
DD 16. Carefully bend theleading edge to the angle shown
ontheplansandpositionitagainsttheribs.Thebends shouldbe
at ribsW6S and W9S. Alignthe leadingedge withthe ribsand
glue itinplace,justas youdidfor theinnerpanel,except startat
ribs W6S and W9S. Add med. orthickCA toeachrelief notch
to fillin any gaps.
DD 4. Trial fitthe Top 1/8"x 3/8"x 23-1/2" Basswood
OuterSpar (SPT1W13) in place by carefullypressing the spar
DD 7 Withthe panel flaton the work surface, installme
1/16"Shear Webs (SPT1W24), followingthe sameprocedureas
youdidontheinnerpanel. Thewebs willextendpastthetopspar
14

but just trimthem flushwiththe spars and sand the edges round
sothey do not make a ridge when the covering is applied.
DD 8.Cutand sand the trailingedge, spars and leading edge
flushwithribW10S. Set the panel downon the plan and cutthe
root end ofthe spars, LE and TE to the correct length. Save the
scrap pieceofTE to use as a spoiler ifneeded.
and the above photos to show you the recommended shape.
CAUTION - Do notsand theTE ofthe tiptoa very thinedge
oritwillget damaged very easily.It is besttoleave it1/32"
-1/16"thick.
DD 11.Apply several drops ofthinCA to the rearportion of
thebalsawingtip.Allowthegluetosoakintothewoodandcure.
The glue willhelp harden the wood and protect itfrom damage.
JOINTHE INNERAND OUTER
WING PANELS
DD 9.Gluethe7/8"BalsaWingTipBlocks(SPTlW23)to
W10S withmed. or thickCA.Line up the frontof the tipblock
withthefrontof theLEandallow theexcess toextendpast theTE.
DD 10.CarveandsandthewingtiptoblendinwithribW1OS
and the TE. Be careful not to change the shape of W10S while
sandingthetip. Therearethreesectionviewsontheleftwingplan
DD 1.Propup the outer wingpanel 3-1/2"(from the work
surfaceto the bottomof the spar at W10S),usingthe top notch
in the DihedralGauge(SPT1W22) between ribsW9S and
W10S. Move the dihedralgauge ifnecessary to get the correct
15

measurementatribW10S.Useasandingblocktocarefullysand
the leading edge, spars and trailingedge to achieve vertical
surfaceson each. Check yourprogress by occasionallysetting
the panel on the plansto make sure you are not sandingany
"sweep" (forwardor backward tilt)intothe wing.HINT-Set the
panel on an "elevated" buildingsurface an inch or soabove the
work surface and use the edge ofthe elevated surfaceto holdthe
sanding block perpendicular to the work surfaceas shown in the
photo.
DD 2. With the inner panel flatonthe work surface, sand
the leading edge, spars and trailing edge sothey areall even and
of the correct length.both sidesof the spars. Usethe die-cutC2 clamps (SPT1W22)
to hold everythinginplace. Wipe offany excess gluebefore it
cures.
DD 3.Test fitthe inner and outerpanels together over the
plan to make sure theleadingedges, spars, and trailingedges all
meet upnicelywhen the tippanel is blocked upthe required
3-1/2"(atthebottomofribW10S) withthedihedralgauge. Sand
any ends if needed to make everythingfitwell.
DD 4. Withthedihedralgaugeinplace,Applymed. or thick
CA orepoxy to the leadingedge, trailingedgeand sparjointsto
"tack glue" thetwopanels together. Hold everything in place
untilthe gluehas cured.
DD 5.Cut the balsa bottom sheeting away (1/32") from the
frontofthe innerpanel spar toclear the polyhedralbrace. Thecut
shouldstartatthe lastW2Sribandcontinuetotheendofthespar.
Punch outtwoof the 1/32"Die-CutPlyPolyhedral Braces
(SPT1W10) withan "S"embossed onthem and test fitthem in
place againstthefrontandback ofthespars.Sandthem ifneeded
to achieve a good fit.
DD 7. Locate thetwo1/32" Die-CutPlyLeadingand
TrailingEdgeBraces(SPT1W10)thatwerenexttothepolyhe-
dralbracesyouusedearlier.Testfittheminplaceandsandthem
ifneeded to make them fitbetween the ribW2S and W4S. The
LE brace shouldbeatleast1/16" belowthe topof the LEto allow
for the1/16" top sheeting,whichwillbe added later.Gluethem
inplace withmed.orthickCA.IftheTEbraceextendsaboveor
below the surface ofthe TE, sand itflush.
DD 8.InstallribsW3SA and W3SB (SPT1W02) between
the innerand outerpanelsusingmed. orthickCA. A littlesanding
may be necessary to achieve a goodfit.Use the rib gauge totilt
the ribs tothe proper angle.
DD 6.When satisfied with the fit,apply a generous beadof
epoxy ormed. orthick CA tothe sparsand install the braces onDD 9.Drill a 13/64"hole down through the hole in the front
wing bolt plate and through the 1/16"bottom sheeting. Lightly
16

sand the tops of the inner panel ribsand the spar to remove any
glue globs oruneven places.
DD 10 Checktomakesureoneedgeofthel/16"x3-l/2" x
30" Balsa Top Leading Edge Sheeting (SPT1W25)isstraight,
and if not, cut itstraight using a metal straight edge.
can putweights onthe strip ofwood if needed CAUTION• It
isimportantto keepthewingflatandwarp-freeduringthis
step!
DD 13Apply thin CA between the pieces ofmasking tape
along the leadingedge Remove the tape and apply thin CA
where the tape was
DD 11.Position the 1/16"sheeting in place sothe straight
edge isagainstthe leadingedge and one end iscoveringW3SA
Applyseveral stripsof maskingtapetoholditinplace andactas
ahingelorthe gluingprocess Press the sheeting ontotheribsand
trimitflushwiththebackedgeofthesparusingamodelingknife
and straightedge Becarefulnot to cutintothethreadwhen
cuttingnear therootofthe panel Savethe scrapofsheeting for
later
DD 12.Lift the sheeting up and apply a bead ofmed orthick
CA alongthe topofeachriband along the top spar Quicklypress
the sheeting down intoplace and hold ituntilthe gluehas cured
Keep the sheeting pressed against the ribs and the spar whilethe
glue cures A straight strip ofwood the length of the panel, can
be abig help when tryingto hold the sheeting down evenlyYou
DD 14Drill a 13/64"hole upthrough thehole in the wing
boltplate and through the 1/16" topsheeting Enlarge thehole in
the topsheeting to approx 5/8diametersothehead of the wing
bolt will passthrough
IFYOU ARENOT INSTALLING
SPOILERS, SKIPTO STEP 23
DD 15Cut one8"long spoiler from the un-notched scrap
end of each Outer Panel Trailing Edge (SPRTW12) Cut four
pieces of 3/16 x 1/4balsa1-1/2 longand twopieces 1"long
from the 3/16"x 1/4"x 24"BalsaSpoilerBayFrame (SPT1W26)
Alsocuttwo pieces of 1/16" x 1/8" Balsa 8-1/16"longfromscrap
1/16"sheeting.
DD 16Gluethe 1/16" x 1/8"x 8-1/16"piece ofbalsa to the
back edge of the sheeting,between the W2S ribsas shown in the
17

photo. Itshouldbeflushwiththetopoftheleadingedgesheeting. tohold the spoiler about 1/32" above the surfaceofthe wingand
then sand the spoiler to match the contour of the wingsurface.
DD 17.Cuta pieceof3/16"x 1/4"Balsa (SPT1W26) to fit
between the W2S ribs(approx. 8-1/16" long).Gluethe stripof
balsainthenotchon theW2SSribs.Itshould begluedtotheW2S
ribsatitsends and be flushwiththe TOP of the ribs.
DD 18. Test fitthe spoilerin the "bay" and sand itifneces-
sarytoachievea 1/32"gaparoundthesidesandtrailingedge. Use
astrip ofmasking tape to temporarily hingethe spoiler along the
1/16"x 1/8"strip ofbalsa.
DD 20.Ifyou are usingthe spoiler setupshown on the plans,
thespoilertubeshould exitthebottomofthewingjustbehindthe
wing joinerbox,betweenthefirstand second W1BS ribs.Drill
a1/8"hole inthe bottom center section sheeting forthe tube.
DD 19.Withthe spoiler in place, gluethe 3/16" x 1/4"x 1-
1/2"pieces ofbalsa to the W2S ribs. These are the spoiler rests
and should be positionedsothey hold the spoiler flushwiththe
top surface of the wing. NOTE: It is important that the spoiler
sit flush withthe top of the wingoritwilldisrupt the airflow
over the wing.Ifyoudesire, you can positionthe 1-1/2" pieces
DD 21.Slidea 1/8"diameternylontubing(innerpushrod
tube or antenna tube, not included)through the holes in the ribs.
Cut a 1/8"wide, 1/8"deep notch in the middleofthe 3/16"x
1/4"x 1"piece of balsa and glueitto the bottom ofthe 3/16" x
1/4"x 8-1/16" piece, trappingthe end of the spoilertubein the
notch as shown in thephoto.The nylonlubeshouldextendpast
theLE approximately4" tohelpgetthespoilerstringtotheservos
in the fuse.Gluethe tube to each riband the bottom sheeting
using med. orthick CA.
18

DD 22. Drilla 1/16" holein each 1/16"Die-CutPlySpoiler
Horn (SPT1W11) atthe indentation.Cuta 1/16" wideslotin the
spoiler for the spoiler horn usinga razor saw (ahack saw blade
willalsowork fine),andgluethehorninplace.Itshouldbeflush
withthe top surfaceof the spoiler asshown on the plans. This
completes the assembly ofthe spoilers untilafter the wing is
covered.
DD 24.Cut the sheeting off at an angle from the frontof
W2BStoapprox.1/4"out from therear of W1BSas shown onthe
plans.Sand thesheetingflushwiththeW1BSribatthe wingroot.
(The photofor thisstepis at the bottomof thelastcolumn)
D25. Now go back to page 9 and assemble the other wing
panel.
D26. Trialfitthetwowinghalvestogetherusingthe wing
joiner.Sand therootofeach panel,ifneeded, toachievea nice
close jointbetween the twowings.Ifthereare largegaps, fill
themwithscrapbalsaor filler.Gluethe1/16"Balsa WingRoot
Caps withan "S"(SPT1W21) to the root of each panel.
DD 23. Cuta 4"anda 5"pieceofl/16"balsasheetingtosheet
the topinboard center section outto ribW2BS, as shownin the
photo. Med. or thickCA should be used forthis step. Gluethe
5"piece near the spars, and cut the4"pieceto fitbetween the first
piece and the trailingedge.
D27. Make sure you can seethe pinpoint punch onthe top of
a 1/16" Ply RearWingBoltPlate(SPT1W11). If not, stick a pin
throughthepunchmark.Sand the "outside"topedges oftherear
wingboltplateto a taper as shown inthephoto.Glueeach one
in placesothe rear is flushwiththe back of the TE and the side
isflushwiththe root cap. Sand the insideedge to match the
dihedralangle of the root cap.
D28.This completes the SPORT wingassembly soskip to
page 34to FUSELAGE ASSEMBLY.
19

ADVANCED WING
ASSEMBLY
D1.Tape the plan to your flatwork surfaceand coverthe
wingdrawingwithwaxed paper. NOTE: Ifyourwork space
islimited,youmay cutthe wingdrawingsapartfromthe restof
theplans.
D 2. The Shaped Wing Leading Edges (SPTlW14) are fastened together.
Cut between the LE'S, withthe knife restingagainst theLE
as a guide.Do notcutverticallyatthe edge ofthe LE or itwillend
upto narrow.Allowthe cutto followthe cross sectional shape
ofthe LE. Sandaway any excess balsa that remains along the
edges usinga sandingblock with100-grit sandpaper, but do not
"square off" the edges.
TWOWARPEDSPARSINSTALLED
THIS WAYWILLRESULTINA
STRAIGHTWING
TWOWARPEDSPARSINSTALLED
THIS WAYWILLRESULTINA
WARPEDWING
D4. Punch outthe twoRibGauge Pieces(SPT1W22) and
assemble them usingCA. Notice that one end ofthe gauge is
slantedat a 3-1/2 degree anglefor positioningtheend ribs.The
other 3 ends are perpendicularand can be used tokeep parts 90
degrees to the work surface.
BUILDTHEINNERWING PANEL
You'llneed the followingparts:
SPT1W05 1/16"Balsa DC Wing Ribs - W2
SPT1W06 1/8"Balsa DC WingRibs- W1,W3
SPT1W07 1/16"Balsa DC WingRibs - W4, W6,
W7,W9
SPT1W081/16"Balsa DC Wing Ribs- W2A & B,
W5,W8,W10
SPT1W12 1/8" x 3/8"x 30" Basswood Inner Spars
SPT1W14 Shaped Balsa Leading Edge
SPT1W18 3/8"Balsa Notched Inner Sub TE
SPT1W20 1/16"x 3" x 30" BalsaWingBottom Sheet
SPT1W22 1/8"Ply DC Clamps and Gauges
SPT1W24 1/16"Balsa Shear Web Pack (26)
D1.Locate all the SPT1W05, SPT1W06, SPT1W07 and
SPT1W08 die-cutribsheets. Check tomake sureyou can read
theembossing oneach rib.Ifyou can not,use the diepatternson
page 5 to determinethe rib#'sand mark the#'s on theribs.
Carefullypunchoutallthedie-cut1/16"BalsaWingRibs.Sand
the edges slightlyto remove any die-cutting irregularities.
D3.Before usingthe1/8"x 3/8"BasswoodSpars, exam-
ine them carefullyfor possible imperfections. Look for knots,
soft spots, diagonal grain and any other imperfections.If pos-
sible, position each spar sothe imperfections are onthe outerhalf
ofthe wing panel (toward the tip), where they willbeleast
affectedby highstress. Ifthespars are warped slightly,"balance
them out"by installingthe warped spars in opposite directions
(seesketch).
D2.Sonthrough the three 1/16"x 3"x 30" Balsa Wing
Bottom Sheeting (SPT1W20) and pickoutthe two sheets that
most closely match each otherin weightand grain.These two
sheets willbe thebottom sheetingforthe innerpanels.Check to
make sure the two "bottom" sheets have atleast one straight
edge. Ifnot, use a metal straightedge to cut aslittleaspossible
offone long edge to make itstraight.
NOTE: Follow the steps withtwo check boxes
to buildthe RIGHTwingpanel,then repeat
these steps to buildtheLEFT wingpanel.
20