Stevens Aero Model GRANGER 1930 ARCHAEOPTERYX Manual

GRANGER
1930 ARCHAEOPTERYX
Sport-scale rendition of the Granger brothers unique 1930 homebuilt.
Wing Span: 40 inches | Wing Area: 220 square inches | Average Flying Weight: 9.5 ounces
Build Instructions - Version 1.24 (revised 10.01.2014)
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 1

WARRANTY
Stevens AeroModel guarantees this kit to be free from defects in both material and workmanship at the
date of purchase. This warranty does not cover any component parts damaged by use or modification.
In no case shall Stevens AeroModel’s liability exceed the original cost of the purchased kit. Further,
Stevens AeroModel reserves the right to change or modify this warranty without notice.
LIABILITY RELEASE
In that Stevens AeroModel has no control over the final assembly or material used for final assembly,
no liability shall be assumed nor accepted for any damage resulting from use by the user. By the act of
using the user-assembled product, the user accepts all resulting liability.
If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is
advised to return this kit immediately in new and unused condition to the place of purchase.
THIS PRODUCT IS NOT INTENDED FOR CHILDREN 12 YEARS OF AGE OR YOUNGER.
WARNING: This product may contain chemicals known to the state of California to cause cancer
and/or birth defects or other reproductive harm.
PRODUCT SUPPORT
This product has been engineered to function properly and perform as advertised, with the suggested
power system and supporting electronics as outlined within this product manual. Product support
cannot be provided, nor can Stevens AeroModel assist in determining the suitability or use of
electronics, hardware, or power systems not explicitly recommended by Stevens AeroModel.
For product assembly support, replacement parts, hardware, and electronics to complete this model,
please contact Stevens AeroModel at www.stevensaero.com.
Stevens AeroModel
26405 Judge Orr Rd., Colorado Springs, CO 80808 USA
719-387-4187 www.stevensaero.com
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 2

Granger Archaeopteryx - Kit Inventory
☐Laser-cut wood, 14 sheets (See Sheet Wood Inventory, page 5 and 6)
☐Illustrated Build Instructions
☐Detail sheets, 3 ea. 11 in. x 17 in.
☐Balsa stripwood, 2ea. 1/4 in. x 1/4 in. x 24 (leading edge stock)
Taped to back of wood brick:
☐1 Push rod, wire, .032 in. x 18 in.
☐1 Strut fittings, wire, .045 in. x 12 in.
☐1 Landing gear, wire, .063 in. x 12 in.
☐Landing gear/tail skid, carbon fiber rod, .078 (2mm) x 12 in.
☐1 Push rod tube, yellow, .070 in. O.D. x 12 in.
Hardware bag:
☐1 Wing retention pin, wire, .075 in. x 6 in.
☐1 Elevon pivot, brass tube, 1/8 in. x 6 in.
☐1 Elevon pivot, brass tube, 3/32 in. x 6 in.
☐1 Heat shrink tube, 1/16 in. x 2 in.
☐1 Strut anchors, aluminum tube, 3/32 in. x 1 in.
☐1 Wheel bushing, splined yellow tube, 1/8 in. x 2 in.
☐1 Wood dowel, 1/8 in. x 2 in. (scale motor)
☐1 pkg. E/Z connectors, (DUB-845)
☐1 Wing pin retainer, rubber
☐1 Laser-cut acetate windscreen
☐1 Pair, Super Lite Wheels, DUB-200SL
☐1 Landing gear skid, LG3, 1/8 in. bass
☐3 Elevon clips, cotter pins, 1/8 in.
☐4 Wheel retainers, black dished washers
☐4 Delrin strut mounts, laser-cut
☐6 Screws, #2 x 1/4 in.
☐6 Neo-Magnets, 3/16 in. dia. x 1/16 in. thick
☐14 Nylon washers, #4
Granger Archaeopteryx - Background
In the late 1920s the Granger brothers built the Archaeopteryx after seeing the successful flights of the
Westland-Hill Pterodactyl. Inspired by the Pterodactyl the brothers designed and built a small light-
weight, semi-tailless, delta-winged parasol, powered by a 35 hp Bristol Cherub engine. The original
plane was so small that they installed the throttle on the outside of the fuselage. The Archaeopteryx was
flown regularly between 1930 and 1936. After 30 years in storage the aircraft was loaned to the
Shuttleworth Collection, a museum of significant early aircraft. The Archaeopteryx was restored to flying
condition by the museum and regularly flown. In 2002 ownership of the airplane passed back to the
Granger family. It is now being restored to hopefully fly again.
Our kit features the unique outlines and controls of the original airframe. Simple to build and a delight to
fly, the Stevens AeroModel Granger Archaeopteryx will definitely turn heads at the flight line...besides it’s
really fun to say.
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 3

Suggested Items to Complete this Model
Many of the suggested items listed below are available at your local hobby shop. For your convenience,
Stevens AeroModel stocks all the power system components and most of the building supplies required
to complete this kit. If you have difficulties sourcing any of these items locally, please visit our website,
stevensaero.com to purchase the items necessary to complete your model.
Required Electronics
☐RC transmitter and receiver with at least 4 channels and elevon mixing
☐1 Motor, SA Sport Park BL250 (SUPA1510/15)
☐1 Speed speed control, SA Sport 10A (SUP10AEA)
☐1 Propeller, 6 x 3 GWS HD (GW/EP6030)
☐1 Prop adapter, 2 mm (EFLM 1927)
☐1 Battery, 550 mAh 7.4
☐3 Servos, Hitec HS-35HD
☐2 Servo extensions, 6 in.
☐2 Servo extensions, 8 in.
Covering Film Requirements
While any high-quality covering film may be used to finish this model, superior results will be achieved by
using genuine AeroLITETM brand covering film, available exclusively from Stevens AeroModel. The lower
working temperature and light weight of AeroLITETM are especially desirable for this type of model.
AeroLITETM is one-third the weight of typical model covering films, and will present a significant weight
savings when applied to this model.
☐1-2 Rolls AeroLITETM or AeroFilmTM
☐1 Roll AeroTrimTM
Sealing Bare Wood
While not required, it is suggested that a high-quality clear lacquer be used to protect and seal any
unfinished wood. One single light coat of clear lacquer should be sufficient to protect the model from
moisture, without adding significantly to the model’s final flying weight.
Many parts of this model may be colored using a lacquer-based spray paint. Listed below are some of
the products we have used on our models. Please feel free to use whatever products you prefer.
☐DEFT clear lacquer-based sealant (available at most hardware stores)
☐Design Master Color Tool, lacquer-based spray paint (available at most arts and crafts stores)
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 4
Required Building Supplies and Tools
☐CA glue, medium, 1 oz. (PAAPT02)
☐CA glue, thin, 1 oz. (PAAPT08)
☐CA glue applicator tips (PAAPT21)
☐CA glue accelerator (PAAPT15)
☐Hobby knife with supply of #11 blades
☐Sanding block with 400 and 600 grit paper
☐Covering iron and heat gun
☐Needle nose pliers, small
☐Jewelers file, small
☐Clear tape, 1/2 in. (DUB916)
☐Velcro for mounting battery (PKZ1039)
☐Masking tape (low-tack blue painters’ tape)
☐AeroLITETM covering film
Optional Building Supplies and Tools
☐Balsa filler (HCAR3401)
☐Modeling clay (ballast)
☐CA glue de-bonder (PAAPT16)
☐Required Building Supplies
☐
☐Clear lacquer-based sealant (DEFT)
☐Lacquer-based spray paint (Design
Master®)

Sheet Wood Inventory (1 of 2)
Build Instructions
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Sheet Wood Inventory (2 of 2)
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 6

General Assembly Instructions
Thank you for purchasing the sport-scale Granger Archaeopteryx from Stevens AeroModel.
This model has been developed and manufactured using state-of-the-art CAD/CAM systems. Our kits
feature a unique interlocking construction process, that when compared to traditional building methods,
saves countless hours of measuring, cutting, sanding, and fitting. We are certain that you’ll find our kit to
offer a truly exceptional build experience.
As this kit is recommended for the novice model builder and pilot, we invite beginners who have
purchased this kit to seek the help of an experienced builder and pilot. If at any time during the assembly
of this kit, should you run across a term or technique that is foreign to you, please contact our staff with
your questions.
IMPORTANT!
Please READ and RE-READ these build instructions along with any other included documentation before
starting your build and/or contacting our staff for builder support.
Pre-Sanding
DO NOT SKIP THIS STEP. Before removing any parts from the laser-cut sheet wood, use a sanding
block loaded with 250 - 400 grit sandpaper and lightly sand the back side of each wood sheet. This step
removes any residue produced as a result of the laser cutting process. We have found that most stock
wood sizes run several thousandths of an inch oversized. This step also slightly reduces the thickness of
each sheet of wood. Leave all parts in the sheet wood until required for assembly.
Protecting Your Work Surface
Use the poly tube that this kit was shipped in as a nonstick barrier between your work surface and the
product assembly.
Bonding the Assembly
This product’s tabs and notches interlock like a 3D puzzle. We strongly suggest that when fitting parts,
you dry fit (use no glue) the parts together first. It is advised to work 1 - 2 steps ahead in the instructions,
using this dry-fit technique. This allows the opportunity to inspect the fit and location of assembled
components, and shows the benefits of our construction technique. As each successive part is added, it
contributes to pulling the entire assembly square. Once you arrive at the end of a major assembly
sequence, square your work on a flat work surface and bond the dry fit joints with glue. Using the dry-fit
process, you’ll be able to recover from a minor build mistake and will ultimately end up with a square and
true assembly.
Unless otherwise noted in the instructions, we find it easier to “tack glue” parts (temporarily bonding parts
in assemblies, using a small dot of glue). When using medium CA glue, apply with a fine-tip CA glue
applicator. Never bond painted or covered assemblies with thin CA, as it can destroy the finish of a
beautifully prepared model.
Never Force the Fit!
This is a precision laser-cut kit. Our lasers cut to within 5 thousandths of an inch in accuracy. Yet the
wood stock supplied to us by the mill may vary in thickness by up to 20 thousandths. This variance in the
wood stock can cause some tabs and notches to fit very tightly. With this in mind, consider lightly sanding
or lightly pinching a tight-fitting tab, rather than forcing the parts together. You will break fewer parts in
assembly, and end up with a square and true airframe.
Manual Updates
Please check our website for updates to these instructions before starting the build. To obtain downloads
and updates to this model aircraft kit, please visit the product page at stevensaero.com
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 7

Fuselage
Fuselage parts are designated by the letter “F” followed by a number. Parts have been numbered so that
the fuselage assembly and required parts follows in numeric order from F1 to F50.
The fuselage is of traditional sheet side with central crutch assembly. Many of the formers will need to be
installed in a forward and top/bottom orientation. Unless otherwise specified, formers should be installed
with the etched part number facing the front of the assembly and any top or bottom designations followed.
You will dry fit the majority of this fuselage assembly together only gluing at the final instruction steps.
When parts cannot easily be retained with friction, use a single tiny drop of medium CA glue applied
sparingly through a CA glue applicator tip to “tack glue” the part in place. Should you commit an error in
assembly it will be easier to recover from the mistake and remove or correct the part fit in error if you do
excessive amounts of glue after each step! This method of assembly will allow our interlocking design to
do it’s job, as each successive part is installed in the fuselage, it will help pull the entire structure square
and true.
Build the Central Crutch
1. The fuselage central crutch and the bulk of the fuselage will be assembled up-side-down on
the work surface. Fit ply part F1 (sheet 07/14, 1/16 in. ply) to balsa part F2 (sheet 01/14,
1/16 in. balsa). Lay on a flat surface, and bond with medium CA
2. Place ply former F3 (sheet 07/14, 1/16 in. ply) on the work surface etched side down.
Press a neo-magnet into each of the two holes in F3. Wick medium CA around the edges
of the magnets, on the back, un-etched side of F3 only. The nose hatch will be installed
against the front of F3 in a later step, and this side must remain free of glue to ensure a
proper fit.
3. Fit former F3 to the notches along the edges of the front end of F1, with the etched side
facing the front of F1. “Tack glue” F3 to F1 on the back side of F3 only. The front of F3
must remain free of any glue, to ensure the proper fit of the hatch in a later step.
4. “Dry fit”, former F4 (sheet 07/14, 1/16 in. ply) into the set of slots immediately behind the
large openings in F1. These slots are stepped to allow parts F5 and F6 to fit behind F4.
Position F4 in the forward portion of the slots.
5. “Dry fit” part F5 (sheet 07/14, 1/16 in. ply) immediately behind F4, in the center portion of
the same slots.
6. “Dry fit” part F6 (sheet 07/14, 1/16 in. ply) immediately behind F5. These three parts form
the landing gear pocket. The landing gear wire will be installed during final assembly.
7. Fit and “tack glue” part F7 (sheet 03/14, 3/32 in. balsa) to the set of slots immediately in
front of the joint between F1 and F2.
8. Fit the servo tray F8 (sheet 07/14, 1/16 in. ply) to the front of F7, and “tack glue” in place.
Build Instructions
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Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 9
Step 1
F1
F2
F3
F3
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
F1
F1
F4
F6
F1
Rear View
Bottom View
Neo-Magnets
Bottom View
Bottom View
F2
F5
Rear View
F3
F3
Front
Front
F1
F2
F7
Tack glue on
the back of
F3. Do not
apply glue
on the front.
Dry Fit F4
“Dry fit”
Dry Fit
Tack
Glue
F7
F8
Tack
Glue
Front
Openings

Fuselage (continued)
9. Fit side rails F9 and F10 (sheet 03/14, 3/32 in. balsa) to F7 and the landing gear pocket.
The arrows at the ends of F9 and F10 will point toward the landing gear pocket, and the
tabs along the edges of F9 and F10 will point outward. F7 will remain vertical, the landing
gear pocket will lean slightly forward when the rails are installed. Tack glue the rails to F7
and F6 of the landing gear pocket.
Fuselage Sides
10. “Dry fit” fuselage side F11 (sheet 01/14, 1/16 in. balsa) to the right side of the fuselage,
engaging the tabs of the central crutch with the notches and slots in the forward portion of
the fuselage side.
11. Dry fit fuselage side F12 (sheet 01/14, 1/16 in. balsa) to the left side of the fuselage,
engaging the tabs on the central crutch with the notches and slots in the fuselage side.
Square the assembly on a flat surface, and final bond the forward portion of the fuselage
assembly with CA. Bond only the parts between F3 and the landing gear pocket, inclusive.
Bond the layers of the landing gear pocket together, but ensure that no glue enters the
pocket itself.
12. Pull the fuselage sides together, tack glueing as you go, engaging the tabs in F7, F8, F9,
F10 and F1 with the notches and slots in the fuselage side.
Square the assembly on a flat surface, and final bond the mid section of the fuselage
between the landing gear pock and F7, inclusive, with CA.
13. “Dry fit” former F13 (sheet 02/14, 1/16 in. balsa) to the set of slots mid-way back on F2.
14. Pull the sides together and “tack glue” the fuselage sides to F13 and F2.
15. Pull the rear of the fuselage sides together, “tack glue” them to F2.
Fuselage Bottom
16. Fit the fuselage bottom F14 (sheet 02/14, 1/16 in. balsa) , engage the tabs on F7 and F13,
and the notches along the bottom of the fuselage sides.
Square the assembly on a flat surface, and “final bond” the rear portion of the fuselage,
from F7 back, with thin CA.
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Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 11
Step 9
Step 10
Step 11
Step 12
Step 16
Step 15
Step 14
Step 13
F10
F9
Front
Tack
F11
F12
Bond This
Section Only
F7
F13
F13
F13
F14
Tack glue
F1
F2
F7
F2

Fuselage (continued)
17. Fit F15 (sheet 03/14, 3/32 in. balsa) over F9, with the etched side facing up, flush against
the fuselage side and former F7. The arrow at one end will point toward F6 of the landing
gear pocket, this end will not touch F6. A gap will remain between F15 and F6, allowing the
installation of an aluminum tube through the strut fitting hole at a later step. Bond F15 to
F9, the fuselage side, and F7 with thin CA.
18. Fit F16 (sheet 03/14, 3/32 in. balsa) over F10, with the etched side facing up, flush against
the fuselage side and former F7. The arrow at one end will point toward F6 of the landing
gear pocket, this end will not touch F6. A gap will remain between F16 and F6, allowing the
installation of an aluminum tube through the strut fitting hole at a later step. Bond F16 to
F10, the fuselage side, and F7 with CA.
19. Fit F17 (sheet 01/14, 1/16 in. balsa) over the forward ends of F15 and F16, engaging the
tabs on F6, and the notches along the fuselage sides. Bond with CA. Ensure that no glue
enters the landing gear pocket.
20. Position F18 (sheet 01/14, 1/16 in. balsa) behind the left side of former F3, flush against the
fuselage side and F1. F18 backs up the magnet in F3, providing additional support and
gluing surface. Wick CA around the edges of F18 to bond.
21. Position F19 (sheet 01/14, 1/16 in. balsa) behind the right side of F3, flush against the
fuselage side and F1. Bond with CA.
22. Fit part F20 (sheet 05/14, 3/16 in. balsa) to the slot in the bottom right of F3, immediately
below F19. Ensure that the strut fitting hole is not blocked, and that there is a 1/16 in. gap
between the bottom edge of F20 and the bottom edge of the fuselage side. Bond with CA.
23. Fit part F21 (sheet 05/14, 3/16 in. balsa) to the slot in the bottom left of F3, immediately
below F18. Ensure that the strut fitting hole is not blocked, and that there is a 1/16 in. gap
between the bottom edge of F21 and the bottom edge of the fuselage side. Bond with CA.
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Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 13
Step 17
Step 17 Cont.
Step 18
Step 19
Step 23
Step 22
Step 21
Step 20
F9
F6
Gap
F15
F6
Gap
Strut
Fitting
Hole
Forward
F10
F6
Gap
Forward
Forward
F17
Landing Gear Pocket
F3
F18
F3
F1
F1
Flush
F19
Flush
Strut
Fitting
Hole
F20
F3 F19
1/16 in.
Gap
F3
F18
F21
Strut
Fitting
Hole1/16 in.
Gap
F15
F16
Flush
Flush

Fuselage (continued)
24. Fit the fuselage bottom F22 (sheet 02/14, 1/16 in. balsa) to F3, F4 of the landing gear
pocket, and the bottom edge of the fuselage sides. Bond with CA. Ensure that no glue
enters the landing gear pocket.
Hatch Magnet Assembly
25. Press a neo-magnet into the round hole in the middle of ply part F23 (sheet 07/14, 1/16 in.
ply).
26. Fit ply part F24 (sheet 07/14, 1/16 in. ply) to F23, partially trapping the magnet. Ensure that
the tabs on F23 and F25 are on the same side of the assembly. Bond F23 and the magnet
to F24 by running a bead of medium CA along the seam between these parts.
27. Fit the hatch magnet assembly to the slots on the front of former F7. Bond with thin CA.
Fuselage Top
28. Motor Mount: Fit and tack glue the ply motor mount F25 (sheet 07/14, 1/16 in. ply) to the
side support F26 (sheet 07/14, 1/16 in. ply). Ensure that F25 is oriented with the etched
side marked “Front” facing forward, with F26 behind it. The arrow on F26 should point
forward.
29. Fit and tack glue side support F27 (sheet 07/14, 1/16 in. ply) to the other side of the motor
mount, as shown. The arrow on F27 should point forward.
30. Fit and tack glue ply former F28 (sheet 07/14, 1/16 in. ply) to the rear of the side supports
F26 and F27.
31. Turn the fuselage assembly right-side-up on the table. Fit the motor mount assembly to the
slots and notches at the front of F1. Bond the motor mount assembly together, and to F1,
by building up a small filet of medium CA along all seams.
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Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 15
Step 24
Step 25
Step 26
Step 27
Step 31
Step 30
Step 29
Step 28
F22
F23
F23
F24
Neo-Magnet
F17
Font of
F7
F25
Front
F26
F26
F27
F25
Rear View
F28
Rear View
F28
F27
F25
F25
F26
F1
Tabs

Fuselage (continued)
32. Begin the front cabane strut pocket by fitting ply part F29 (sheet 07/14, 1/16 in. ply)
immediately behind, and in the same slots as, former F28. DO NOT BOND.
33. Complete the front cabane strut pocket by fitting ply former F30 (sheet 06/14, 1/32 in. ply)
immediately behind, and in the same slots as, parts F28 and F29. Press all three ply
formers together. Wick CA along the edges and base of the cabane strut pocket assembly,
ensure that no glue enters the pocket itself.
34. Fit and bond balsa former F31 (sheet 02/14, 1/16 in. balsa) to the next set of slots in F1, to
the rear of the strut pocket.
35. Fit former F32 (sheet 06/14, 1/32 in. ply) to the next set of slots in F1, behind of F31 and the
large openings in F1. The slots are oversized, to allow F33 and F34 to be fitted in the
following steps. Position F32 in the front portion of the slots. DO NOT BOND.
36. Fit part F33 (sheet 07/14, 1/16 in. ply) into the same slots as, and immediately behind,
former F32. DO NOT BOND.
37. Complete the strut pocket by fitting former F34 (sheet 06/14, 1/32 in. ply) etched face
toward the back in the same slots as, and immediately behind, formers F32 and F33. Bring
all three formers together, ensure that they are perpendicular to F1. Bond them to each
other and F1 by wicking CA along the edges and base of the formers, ensure that no glue
enters the pocket itself.
Top Sheeting
38. Assemble the top sheeting by fitting parts F35a and F35b (sheet 02/14, 1/16 in. balsa)
together. Bond by wicking a small amount of CA along the seam. Do not use any more glue
than necessary, too much glue will stiffen the wood, making it difficult to form properly in the
next step.
39. Moisten one side of the F35 assembly with glass cleaner and allow to soak for a few
minutes. The ammonia in the glass cleaner softens the lignin in the wood, allowing it to
bend easily. When the wood dries, the lignin will set, holding the sheeting in its new shape.
Fit F35 to the top of the fuselage - moist side out - covering the motor mount, and extending
to the rear strut pocket. Hold in place with low-tack masking tape until dry.
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Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 17
Step 32
Step 33
Step 34
Step 35
Step 39
Step 38
Step 37
Step 36
F29
F30
Rear View
Rear View
Rear View
Rear View
Rear View
Rear View
F30
F31
F32
F33
F34
F1
F1
F1
F1
F1
F1
F28
F31
F32
F35a
F35b
F35
Bond Bond

Fuselage (continued)
40. F35 will swell when wet. Allow it to dry thoroughly, so it will return to it’s original dimensions.
This will make easier to fit, than if you try to rush things and glue while F35 is still wet.
When F35 is completely dry, remove the tape and fit in place. Check that the tabs on all of
the formers fit through the corresponding slots, and that the strut pockets remain open.
Bond F35 to the formers and fuselage sides by wicking CA along the seams and slots
where the former tabs protrude. Ensure that no glue enters the strut pockets.
Rear Fuselage
41. Fit ply former F36 (sheet 06/14, 1/32 in. ply) to the set of slots just forward of the joint
between F1 and F2. “Tack glue” in place.
42. Fit and “tack glue” balsa former F37 (sheet 02/14, 1/16 in. balsa) to the next set of slots in
F2, behind former F36.
43. Fit and “tack glue” former F38 (sheet 01/14, 1/16 in. balsa) to the last set of slots in F2,
behind former F37.
44. Fit the center stringer F39 (sheet 04/14, 1/8 in. balsa) to formers F26 through F38. The
front of the stringer will tab into the slot at the top of former F36. The rear of the stringer will
tab into the slot in F2 behind former F38. Ensure that F39 is fully seated in all formers, then
bond the formers to F39 and F2 with CA.
45. Assemble the rear cockpit sheeting from parts F40a, F40b, and F40c (sheet 02/14, 1/16 in.
balsa). Ensure that the arrows etched on all three parts point in the same direction when
assembled. Apply a small amount of CA to the seams between the parts. Do not apply too
much glue, as this will stiffen the wood making it harder to form in the next step.
46. Moisten one side of the F40 assembly with glass cleaner and allow to soak in for a minute
or two. Fit F40 to F36 and F37 with the arrows pointing forward, align the edges along the
fuselage sides. Hold in place with low-tack masking tape until dry.
47. When F40 is completely dry, remove the tape and bond the F40 assembly to F36, F37, the
fuselage sides, and the rear tips of the forward sheeting F35.
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 18
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Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 19
Step 40
Step 41
Step 42
Step 43
Step 47
Step 46
Step 45
Step 44
F35
F36
F1
F2
F1
F36
F2
F37
F38
F2
F36
F37
F38
F39
F40a
F40b
F40c

Fuselage (continued)
48. Fit two stringers F41 (sheet 04/14, 1/8 in. balsa) to the notches in formers F36, F37, and
F38, on on each side of the central stringer F29. Bond with CA.
49. Fit two stringers F42 (sheet 04/14, 1/8 in. balsa) to the next set of notches out from
stringers F41, and bond with CA.
50. Fit two stringers F43 (sheet 04/14, 1/8 in. balsa) to the notches in formers F37 and F38, and
the notches at the rear of the cockpit sheeting F40. Bond with CA.
51. Build up the tail block by positioning and bonding the laminations F44 through F46 (sheet
04/14, 1/8 in. balsa) on each side of the central stringer F29. F44 will go on the inside
against F29, F45 in the middle, and F46 on the outside. All of the laminations must touch
former F38.
52. Sand the side of the tail block so that it flows into the fuselage sides.
53. Round the sides of the tail block to match the contour of former F38, tapering to a point at
the rear. Shape one half at a time, ensuring that the top edge of F29 remains flat. An easy
way to do this is to cover F29 with a piece of masking tape, protecting it while it is being
sanded.
Nose
54. Remove part F47 (sheet 03/14, 3/16 in. balsa) from the cut sheet, leaving the center portion
attached to the part for the time being. Position F47 against the front of the motor mount.
F47 is slightly oversized, and should stand proud of the fuselage sheeting a uniform 1/32 in.
all the way around. Using only medium CA, “tack glue” F47 to the motor mount and F1 at
the points indicated in the photo. DO NOT use thin CA to do this, as it will wick through the
wood and bond the center portion to the motor mount.
Build Instructions
Granger Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 20
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