Stevens Aero Model Fly Baby Bipe Manual

Fly Baby Bipe..
Bower’s timeless homebuilt.
Wing Span: 14.5 inches | Wing Area: 62 inches2| Average Flying Weight: 1.5 ounces
Version 1.0 (revised 03.14.2014)
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 1
UM

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
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 2

Project Checklist
Kit Contents
☐Laser Cut Wood (7 Sheets)
☐Build Instructions
☐Computer Drawn Detail Pages (2 Pages)
☐Pre-Cut Acetate Windscreen
Taped to back of wood brick:
☐1 - 0.032 in. x 12 in. wire (Landing Gear)
☐2 - 0.015 in. x 12 in. wire (Pushrods)
☐Hardware Bag
1 - 1-1/2 in. length of Heat Shrink Tube
1 - Nylon Receiver Clip
1 - Pair Wheels (SIGSH540)
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 3

Suggested Items To Complete This Model
Many of the following items will be available at your local hobby shop. For your convenience Stevens
AeroModel stocks all of the power system components and most of the required and optional building
supplies. If you have difficulties sourcing any of the requisite items locally, please visit our web site to
purchase those items necessary to complete your model.
Required Electronics (Available at StevensAero.com)
☐Transmitter with at least 3 channels
☐Receiver/ESC/Servo Brick [PKZ3351 or PKZUA1151]*
☐Motor/Gearbox [PKZ3624]
☐130mm x 70mm Propellor [EFL9051]
☐130-160 mAh 3.7V LiPo battery.
*SPMAR6400 may be used with computer radio and mix.
Covering Film Requirements
While any high quality model film may be used to finish this model. Superior results will be achieved
using genuine AeroLITE brand model airplane covering film. The lower working temperature and superior
light weight of AeroLITE are especially desirable for this style of model airplane. AeroLITE is 1/3 the
weight of the typical model airplane covering film and will represent a weight savings over competing films
when applied to this model.
☐2 - Patch Packs or 1 Roll (2M) AeroLITE or AeroFILM
☐1 - Patch Pack in Trim Color of AeroLite or 1 Roll (1M) AeroTRIM (self adhesive trim)
Wood Sealant Suggestions
While not required, it is suggested that a high quality lacquer based clear sealant be applied SPARINGLY
to seal and protect the wood grain in humid environments. One single light misting of this sealant will be
sufficient to repel water without adding significantly to the models final flying weight. Likewise, much of
this model can be colored using a compatible lacquer based spray paint. Below are our suggestions, feel
free to use your preferred product.
☐DEFT clear lacquer based sealant (available at most hardware stores).
☐Design Master Color Tool lacquer based spray paint (available at most art supply stores).
Required Building Supplies and Tools
☐1/4 oz. Medium CA Glue (PAAPT04)
☐1/4 oz. Thin CA Glue (PAAPT10)
☐CA glue applicator tips (PAAPT21)
☐CA glue accelerator (PAAPT15)
☐Hobby Knife with ample supply of #11 blades
☐Sanding block with 400 and 600 grit paper
☐Heat Gun and Covering Iron
☐Small Needle Nose Pliers
☐1/2 in. wide clear tape (DUB916)
☐Velcro for Battery Mounting (PKZ1039)
☐Masking Tape (Low tack blue painters tape)
☐AeroLite Covering Film (1-2 Patch Packs)
Optional Building Supplies and Tools
☐Balsa Filler (HCAR3401)
☐Thick CA Glue (PAAPT20)
☐Modeling Clay for Ballast
☐CA glue de-bonder (PAAPT16)
☐Masking Tape (Low tack blue painters tape)
☐Clear Lacquer based sealant (DEFT)
☐Lacquer based spray paint (Design Master)
☐Glass Cleaner
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 4

Sheet Wood Inventory (1 of 1)
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 5

Builders Notes
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 6

General Assembly Instructions
Thank you, for purchasing this Stevens Fly Baby Bipe (UM).This product has been developed and
manufactured using state of the art CAD/CAM systems and features a unique interlocking construction
process that, when compared to traditional methods found in other model aircraft kits, save 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 a seasoned builder and pilot. At any time
should one run across a term or technique that is foreign please don’t hesitate to contact our staff with
your questions.
READ THIS!
Please READ and RE-READ these instructions along with any other included documentation prior to
starting your build and/or contacting our staff for builder support.
Pre-sanding
Do not skip this step. Prior to removing any parts from the laser cut sheet wood use a sanding block
loaded with 250-400 grit paper and lightly sand the back side of each sheet of wood. This step removes
any residue produced as a result of the laser cutting process and, as we have found that most stock wood
sizes run several thousandths of an inch over sized, slightly reduces the thickness of each sheet.
Leave your pre-sanded parts in the sheet until required in the assembly process.
Protecting your worktable
Use the poly tube that this kit was shipped in as a non-stick barrier between your worktable and the
product assembly. Promptly clean up any epoxy spills with rubbing alcohol and a disposable towel.
Bonding the assembly
As this product tabs, notches, and otherwise interlocks like a 3D puzzle we suggest that when fitting parts
you dry fit (use no glue) the parts together first. It’s advised to work 1-2 steps ahead in the instructions
using this dry-fit technique which allows ample opportunity to inspect the fit and location of assembled
components and realizes a benefit as each successive part contributes to pulling the entire assembly
square. Once you arrive at the end of a major assembly sequence square your work on top of a flat
building table and revisit 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 more square and true assembly.
Unless otherwise noted in the instructions we find it easier to tack glue part (temporarily bonding parts in
assembly using a small dot of glue) using medium CA glue applied with a fine-tip CA glue applicator tip.
Tight fitting joints should be bonded using thin CA glue applied, sparingly, with a CA glue applicator tip.
Never force the fit!
Remember this is a precision cut kit our machines cut to within 5 thousandth of an inch in accuracy. Yet
the wood stock supplied by the mill may vary in thickness by up to 20 thousandths. This variance in the
wood stock can cause some tabs/notches to fit very tight. With this in mind, consider lightly sanding, or
lightly pinching, a tight fitting tab rather than crushing and forcing your parts together. You’ll break fewer
parts in assembly and will end up with a more square and true airframe.
Manual Updates
Please check our web-site for updates to these instructions prior to commencing the build.
To obtain downloads and updates relative to this model aircraft kit, please visit the corresponding product
page at StevensAero.com
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 7

Fuselage
Fuselage parts are designated with a “F” followed by a numeric. Parts have been numbered so that the
fuselage assembly and required parts follows in numeric order from F0 to F27 along with Turtle Deck
stringers A, B, and C.
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 instructional 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
not slather the assembly in glue after each step! Further, this method of assembly will allow our
interlocking design to do it’s job as each successive part installed within the fuselage will help pull the
entire structure square and true.
Build the Central Crutch
1. Fit two 1/32 in. ply parts F0 to the nylon Receiver Clip to form the Receiver Tray.
2. Fit receiver tray assembly to the bottom of F1, orienting it so that the long arm of the nylon
clip is toward the rear of F1 - refer to plans for proper orientation. Bond with medium CA.
3. Fit former F2 to the front of F1, orienting it so that the bottom of F2 corresponds to the
bottom of F1.
4. Fit former F3 to the rear of F1, orienting it so that the bottom of F3 corresponds to the
bottom of F1.
5. Fit the assembly to the fuselage side F4. If necessary, lightly tack glue the assembly to the
fuselage side with medium CA.
Landing Gear Block
6. Fit 1/32 in. ply landing gear brace F5 to the forward most edge of the slots immediately
behind former F2 in the fuselage side - reference plan for part location. Do not bond.
7. Now fit 1/32 in. ply landing gear brace F6 to the slots in the fuselage side immediately
behind F5. Do not bond.
8. Fit the final 1/32 in. ply landing gear brace F7 immediately behind F6. Do not bond.
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 8
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Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 9
Step 1
F0
F0
F2
F1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
F1
F1
F3
F4
F5
F5 F6
F7
Nylon
Clip
Front
Bottom
Bottom View
Bottom
Bottom
Front
Rear
Bottom
Bottom
F1
F3
F2
F2
F1
F4
F5
F6
F2
F2
F1
F1
F4
F4

Fuselage Continued
Remaining Side and Top Formers
9. Fit fuselage side F8 to the fuselage assembly. Carefully fit the tabs on F1, formers F2 and
F3, and the landing gear parts F5, F6, and F7 to their corresponding slots in the fuselage
side. Square assembly on a flat surface and bond all mating surfaces with thin CA.
10. Fit F9 along tab and notch locations at fuselage bottom forward of former F3 and tabs at
former F3. Bond F9 to the assembly in the area where it makes contact with these parts as
illustrated.
11. Pull fuselage sides together, fitting the tabs of the fuselage bottom F9 to the slots in the
fuselage sides. Align and square fuselage sides where they taper together at aft most end
of fuselage. Use a low tack painters masking tape to retain the fuselage sides at the tail of
the aircraft, then bond F9 to the fuselage sides.
12. Fit the stabilizer mount F10 to the top, rear of the fuselage sides as illustrated. Ensure F10
is properly seated within the fuselage sides and bond to retain.
13. Fit and bond former F11 to the notches in the fuselage sides immediately ahead of part F10.
14. Fit, square, and bond former F12 to the notches in F1 immediately ahead of former F3.
15. Fit, square, and bond former F13 to the slots in F1 immediately behind former F2.
Motor Mount
16. Fit the ply motor mount supports F14 and F15 to the front of former F2, note that the edge
of these parts marked “bottom” will align flush with the bottom of former F2.
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 10
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Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 11
Step 9
F1
F8
F9
Step 10
Step 11
Step 12
Step 13
Step 14
Step 15
Step 16
F9
F10
F11
F12
F13
F14
F15
Bottom View
Bottom View
F2
F4
F3
F3
F1
F2
BOND HERE ONLY
F3
F4
F10
F1
F3
F2
Top
Bottom
Bottom
Align and Tape

Fuselage Continued
17. Fit and bond motor mount plate F16 to former F2 and the tops of F14 and F15. Ensure that
the side marked ”Bottom” faces down. This will position the motor for the correct right thrust
offset.
Nose Bowl / Cowl
18. Fit and bond the, 1/8 in. balsa, bottom nose bowl part F17 to the tabs on the bottom of parts
F14 and F15.
19. Fit and bond the, 1/8 in. balsa right and left, sides of the nose bowl F18 and F19 to the ply
motor mount F16 aligning with the bottom edge of part F17 and fit flush with the firewall F2.
20. Fit and bond F20, the first of three stacked forward nose bowl parts, to the tabs on the front
of F14 and F15. The rounded end of F20 is the top of the piece, corresponding with the
shapes of the formers throughout the rest of the fuselage. Ensure that the etched side
faces forward.
21. Now, fit F21 within the etched border on the face of F20, ensuring that the etched side of
F21 faces forward. Bond F21 to retain.
22. Align F22 within the etched outline on the face of F21. Bond to retain part.
Mount The Motor
It is now necessary to prepare and mount your PKZ3624 motor within the fuselage. Future access to the
motor will require cutting away at the finished fuselage, thus it is highly recommended that you test your
motor for function and proper fit PRIOR TO INSTALLING it within the fuselage. While it is rare to come
across a non-functioning motor, plan on it happening to you (Yes, Murphy is still out to get you)! Only
proceed after verifying the proper function of your motor and gearbox assembly.
23. Remove the plastic motor mounting posts from the mounting tabs of the motor/gearbox
[PKZ3624] and sand the mounting tabs smooth. Feed the motor lead wires through the
opening in F16, through the hole in former F2, and into the radio compartment.
Now, tilt the motor and slip the geared end into the openings in the nose layers.
Finally, nest the motor on top of F16 centered within the pre-cut and shaped opening.
Ensure that the gears on the gearbox are not hindered by the nose layer parts F20, F21,
and F22. If necessary, enlarge opening slightly with a sharp hobby knife until gear turns
freely. (photo on page 15)
Once satisfied with the fit of the motor within the nose of the model, bond by wicking
medium CA glue under each of the plastic motor mounting tabs.
Note: White glue and silicone (RTV sealant) work great as well for motor retention and
allow much easier removal/salvage but require longer working times to setup. Choose the
glue you feel most comfortable using to mount the motor.
Build Instructions
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Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 13
Step 17
F16
F17
F18
F19
Step 18
Step 19
Step 20
Step 21
Step 22
Step 23
Step 23 Cont.
F20
F21
F22
Bottom View
F2
F2
F15
F14
F15
F14
F16
F15
F14
F18
F19
TEST YOUR MOTOR
BEFORE INSTALLATION

Fuselage Continued
Sheet and Stringer that Fuselage!
24. Moisten one side of nose sheeting F23 with glass cleaner and allow to soak in for a minute
or two. F23 will start to take on a curve as the glass cleaner expands the wood on the
moist side.
Fit F23 to nose area, moist side out, resting on formers F2 and F20, and butting up against
the nose side F18 and F19. Ensure that F23 only covers half of former F2; leaving one half
of the thickness of F2 available to rest the F24 sheeting upon in the next steps. Hold F23 in
place with low tack masking tape until thoroughly dry, then bond to the nose with medium or
thick CA.
25. In the same manner as above, moisten one side of F24, and allow the glass cleaner to soak
in for a minute or two.
Position F24 on fuselage, resting on the exposed area of former F2, and overlapping former
F13, with the edges mating flush with the fuselage sides. Hold in place with masking tape
until dry, then bond with medium or thick CA.
26. Turn the fuselage over, and fit bottom sheeting F25 between former F2 and the landing gear
pocket. F25 should rest on the edge of the landing gear pocket F5, but don’t allow the slot
created by F6 at the center of the pocket to become blocked. Bond with thin CA, ensuring
that no glue gets into the landing gear pocket.
27. Fit and bond bottom sheeting F26 immediately behind the landing gear pocket overlapping
F7 and, again, insuring that no glue enters the pocket itself.
28. Turn fuselage right side up, and fit stringer “A” to the center slots in all the formers listed
front to rear: F12, F3, and F11. The rear end of stringer “A” will rest on the stabilizer mount
F10. Bond stringer “A” where it contacts all formers with the exception of F10.
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 14
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Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 15
F23
Step 24
Step 25
Step 26
Step 27
Step 28
F24
F25
F26
A
Bottom View
Bottom View
Step 23 Cont.
Step 24 Cont.
Step 25 Cont.
F2
F23
F24
F23 F2
F13
Moisten with Glass Cleaner
Moisten with Glass Cleaner
F13
F5
F6
F12
F10
F3
F11

Fuselage Continued
29. Fit two stringers “B to the inner notches on the right and left side of the center stringer “A”.
Again, stringer will span formers F12, F3, F11, and come to rest on top of F10. Bond
stringer where it contacts all formers with the exception of F10
30. Fit two stringers “C” to the outer notches on the right and left side of stringer “B”. Bond
stringer where it contacts all formers with the exception of F10
Complete the stringer installation by spacing the ends of the stringers equally where they
contact F10. Bond with CA to retain.
Fuselage Finishing Instructions
31. Revisit any tack glue joints with medium CA glue to thoroughly bond assembly. Using a fine
grit sand paper and sanding block, lightly sand all exterior surfaces of the fuselage. Protect
the motor shaft with a small piece of masking tape then, shape/sand the nose bowl / cowl to
the contours shown on the plan. (Tip: You’ll want to knock the “stair steps” off the balsa
parts that form the nose bowl / cowl - this will go a long way to producing the final proper
shape) Fill any cracks or gaps in your nose bowl after shaping using balsa colored wood
filler, allow to cure, then lightly sand to a smooth finish.
Tail Surfaces
32. Fit and bond the 1/32 plywood elevator joiner E1 to the elevator halves E2. (Tip: Use a
straight edge to align the leading edge of this assembly prior to committing parts with glue)
33. Follow the “Tape Hinge Diagram” on the plan and bevel the leading edge of the elevator
and the rudder R.
Lightly block sand the elevator, rudder, vertical “V”, and horizontal “H” stabilizers in
preparation for finishing and final assembly.
Wings
Wing parts are designated with a “W” followed by a numeric. Parts have been numbered so that the wing
assembly and required parts follows in numeric order from W1 to W13. Most of the assembly will be
lightly tack glued together, final bonding taking place during the final assembly stages.
Center Section
34. Lay the center section W1 on the table with the etched side facing up. Fit two ribs W2 to
the slots at the trailing edge of W1, with arrows on the ribs pointing toward the leading edge
of W1 and etched triangles on side of rib parts to inside of assembly. Bond at trailing edge.
Now, turn the center section over on a flat surface. Carefully wrap W1 over the ribs and
tack glue at the leading edge of each rib. If W1 will not accept the bend easily, lightly
moisten the forward and top edge of W1 with glass cleaner and allow to soak in for a minute
or two. This should render W1 more flexible, and allow it to accept the curve of the ribs.
After W1 has been tack glued in place, turn the center section back over and final bond the
ribs to W1 by wicking CA along the mating surfaces between the ribs and W1.
35. Create a wire jig to assist with part location. Cut a length of the 1/32 (.032) wire to 2-3/4 in.
long from the provided 12 in. piece. Slide this wire through the front holes in ribs W2. Slide
the remaining longer length of wire through the rear holes in the ribs. Do not bond the
wires to the ribs!
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 16
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Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 17
Step 29
B
E2
Step 30
Step 31
Step 32
Step 33
Step 34
Step 34 Cont.
Step 35
B
C
C
E2E1
W1
W2
W2
Wire Jig
F12
F10
F3
F11
F12
F3
F11
F10
Sand / Shape and Fill the Nose
Bowl / Cowl.
45 deg.
Bevel the Leading Edge of Rudder and
Elevator assembly as illustrated.

Wings Continued
36. Slide ribs W3 over the wires and against each rib W2. Ensure that the etched triangle on
part W3 faces the outside of the assembly. Bond ribs W3 to ribs W2, then remove
alignment/jig wires. Lightly sand the top surface of the assembly then set aside until Final
Assembly.
Upper Wing Panels
37. Create one W4 upper wing sheeting by fitting and bonding W4a and W4b together.
Important: Ensure etch marks on parts W4a/b are to a common side. Now, lay W4 on the
table with the etched surfaces facing up.
38. Fit ribs W5, W6, and W7 in their designated positions (refer to plan and part W4 for correct
placement) with the arrows on the ribs pointing toward the leading edge. Tack glue the
trailing edge of each rib to the wing sheeting W4.
39. Turn the wing over on a flat surface, and wrap the sheeting over the leading edge of the
ribs, engaging the tabs of the ribs in the slots in the sheeting. Tack glue at each tab and
notch location. Now, turn the wing back over and final bond the ribs by wicking medium CA
along all mating surfaces.
40. Repeat □□steps 37, 38, and 39 to build the opposite mirrored upper wing panel.
Upper Wing Panels
41. Create one W8 lower wing sheeting by fitting and bonding W8a and W8b together.
Important: Ensure etch marks on parts W8a/b are to a common side. Fit W8c to W8 and
bond with thin CA. Now, lay W8 on the table with the etched surfaces facing up.
42. Fit ribs W9, W10, W11, and W12 in their designated positions (refer to plan for correct
placement) with the arrows on the ribs pointing toward the leading edge. Tack glue the
trailing edge of each rib to the wing sheeting W8.
43. Turn the wing over on a flat surface, and wrap the sheeting over the leading edge of the
ribs, engaging the tabs of the ribs in the slots in the sheeting. Tack glue at each tab/slot.
Turn the wing back over and final bond the ribs by wicking thin CA along all mating
surfaces.
44. Repeat □□steps 41, 42, and 43 to build the opposite mirrored lower wing panel.
Finishing the Wing Panels
45. This is a critical step to your success with this model. Don’t overlook it. Inspect each wing
panel to ensure it is warp free by laying each panel along your flat work surface. If the
bottom surface of the ribs will not sit flat atop your work table you’ve got a warp. Now is the
time to correct this warp.
To correct a warped panel heavily mist the top and bottom surface of the panel with glass
cleaner then pin or tape the moistened panel at the outer most ribs (not along the un-
supported sheeting) to your work table and allow to dry completely.
Sand wing panels lightly to remove any wood grain that is raised as a result of this
treatment.
Build Instructions
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Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 19
Step 36
W3
W4a
W6
W9
W4b
Step 37
Step 38
Step 39
Step 41
Step 42
Step 43
Step 44
W3
W7
W8a
W8b
W8c
W10
W11
W12
Etch sides of parts
W4a/b faces up!
W5
W4
Etch sides of parts
W4 faces up!
Top of Wing Panel
Bottom View
Bottom View
Bottom View
Bottom View
Etch sides of parts
W8a/b faces up!
Bottom View
W8b
W8a
W8
Top of Wing Panel

Wings Continued
Inter-plane and Cabane Struts
46. Refer to the “Inter-Plane Strut Detail” on the plan set for a 1:1 part placement diagram. Fit
and bond ply parts IS1, IS2, and IS3 together over the plan to create two sets of inter-plane
struts.
Tip: As the laser makes a slightly angled cut, alternating the etch side of parts to fit etch
side up, etch side down, etch side up will typically produce a better fitting and stronger
assembly.
47. Refer to the “Cabane Strut Detail” on the plan set for a 1:1 part placement diagram. Create
two sets of cabane struts by fitting and bonding CS1, CS2, and CS3 together.
Tip: As the laser makes a slightly angled cut, alternating the etch side of parts to fit etch
side up, etch side down, etch side up will typically produce a better fitting and stronger
assembly.
48. Create two sets of landing gear struts by fitting and bonding together LG1 and LG2.
Tip: As the laser makes a slightly angled cut, alternating the etch side of parts to fit etch
side up, etch side down, etch side up will typically produce a better fitting and stronger
assembly.
49. Temporarily fit the landing gear struts to the slots in F25 and F26. DO NOT BOND. Fit the
ply landing gear spreader LG3 to the notches in the bases of the struts. Align struts so that
they are symmetrical on either side of the fuselage, and the spreader is parallel to the
bottom of the fuselage as viewed from the front. Bond the spreader to the struts with
medium CA. Remove landing gear assembly from fuselage. Set all struts aside until final
assembly.
Head Rest
50. Align one HR2 within the etched outline on one side of HR1. Position the remaining HR2 on
the other side of HR1, aligning it to match the position of the first HR2. Note: The bottoms
of the HR2’s will extend slightly below that of HR1. Bond by wicking thin CA around the
edges.
Now, sand the sides of the head rest to a sharp taper.
51. Position HR3 on the front of the head rest. Note: The bottom of HR3 will extend below the
bottom of the head rest. This will allow HR3 to hook over the edge of former F12, creating
the illusion of a head rest “cushion”. Bond with thin CA. Round the top of the head rest to
match the contour of HR3.
Build Instructions
Fly Baby Bipe UM Build Instructions. © 2012 Stevens AeroModel all rights reserved.!Page 20
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