Stevens Aero Model Say's Nuh! C-140 Manual

C-140 “Say’s Nuh!”
Post War Two Seat Light Aircraft Trainer
Wing Span: 21 inches | Wing Area: 63 square inches | Average Flying Weight: 1.5 ounces
Build Instructions - Version 1.0 (revised 04.15.2014)
Build Instructions
1946 “Say’s Nuh!” C-140 UM 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
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 2

Kit Inventory
☐Laser Cut Wood (9 Sheets)
☐Build Instructions
☐Computer Drawn Plans (2 Pages 11x17)
☐Pre-Cut Acetate Windscreen
Taped to back of wood brick:
☐2 - 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 Heat Shrink Tube
1 - Nylon Receiver Clip
1 - Pair Plastic Wheels [SH540]
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 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, PKZ3352, or PKZUA1151]*
☐Motor/Gearbox [PKZ3624]
☐130mm x 70mm Propellor [EFL9051]
☐120-160 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 Paks AeroLITE
☐1 - Roll (1M) AeroTRIM or 1 Patch Pak AeroLITE in desired trim color
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)
☐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)
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 4

Sheet Wood Inventory (1 of 1)
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 5

Builders Notes
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 6

General Assembly Instructions
Thank you, for purchasing this Stevens 1946 “Say’s Nuh!” C-140.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 parts (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
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 7

Fuselage
With the exception of the receiver tray, 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 F1 to F22 (F22 is used in the final assembly sequence).
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.
Receiver Tray
For more detailed drawings of the receiver tray assembly, refer to the “Receiver Tray Detail” on the plan
set “Page 1 of 2”.
1. Fit to ply parts RT to the nylon receiver clip. Ensure that the long end (Designated by the
etch mark “RT”) of each ply receiver tray part is on the same side of the receiver clip.
2. Fit the ply part marked “Battery Tray” to the recess on the long end of parts RT.
Fuselage Central Crutch
3. Fit receiver tray assembly to the slots on the bottom side of F1. The receiver tray has been
keyed to fit to the bottom of part F1 in only one direction. If the tray does not fit within the
designated notches you’ll need to reverse your parts. Bond the assembled parts to each
other and F1 with CA glue.
4. Fit former F2 to the front of F1. The receiver tray should be located on the underside of F1,
with the side of F2 marked “Top” oriented up.
5. Fit former F3 to the rear of F1, with the end marked “top” oriented up.
6. Slide ply former F4 into the slots within F1 immediately in front of former F3. Seat former
F4 completely down against F1. This completes the fuselage crutch assembly. Verify your
completed crutch assembly against the printed plans (Page 1 of 2) then tack glue
assembled parts along the tab and notch locations with a small dab of Medium CA glue.
Right Fuselage Side
7. Assemble F5a/b, forward fuselage side, from parts F5a and F5b (F5c will not be added to
this assembly until after F5, forward fuselage side, has been tack glued into position on the
crutch). Fit window upright F5b to dove-tailed slots within forward fuselage side F5a and
bond with CA glue.
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 8
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Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 9
Step 1
RT
RT
F1
“bottom”
Step 2
Step 3
Step 4
Step 5
Step 6
Step 6 Cont.
Step 7
F2
“top”
F3
F4
F5b
F5a
Nylon Clip
“top”
F1
“Battery Tray”
RT
RT
Nylon Clip
Receiver Tray
F1
“bottom”
F1
“bottom”
“top”
F3
F2
F1
F3
F4
“bottom”
“top”

Fuselage Continued
8. Fit the fuselage side F5a/b to the right side of the crutch assembly, spanning F2 and F4.
Note: that when properly positioned, the aft edge of F5a/b will span the center line of
former F4. Tack glue at tab and notch locations with medium CA to retain.
9. Fit the rear fuselage side F5c to the tabs on F1 and formers F3 and F4. Tack glue only at
tab and notch locations to retain the right fuselage side F5c within assembly. Note: that
when properly positioned, the forward edge of F5c will span the center line of former F4.
Note! Do not attempt to bend the wing rib profile on sub-part F5a to follow angle of
F5c. (Jump ahead to the Step 13 detail photo for a better understanding of how F5a
and F5c should interrelate)
Left Fuselage Side
10. Repeat “□□”step 7 to assemble the left fuselage side F6a/b from parts F6a and F6b. Fit
and tack glue the assembly to the left side of the fuselage, again spanning formers F2 and
F4. Note: that when properly positioned, the aft edge of F6c will span the center line of
former F4.
11. Fit and tack glue the rear fuselage side F6c to the tabs on F1 and formers F3 and F4.
Note: that when properly positioned, the forward edge of F6c will span the center line of
former F4. Tip: Align/match the top/bottom edges of the fuselage sides F5c and F6c at the
aft end of the fuselage and retain with a bit of tape. This will help ensure a twist free
assembly of the aft portion of the fuselage.
Aft Fuselage Assembly
12. Fit former F7 to the slots in the rear portion of the fuselage sides F5c, F6c, and behind
former F3. Tack glue at tab and notch locations with medium CA to retain.
13. Fit parts F8 into the notches at right and left of fuselage in the corners of formers F3 and
F7. The ends with the arrows will butt up against former F4 and against the fuselage sides.
Note: Forward of former F3, parts F8 will naturally rise slightly above the upper profile of
the rear fuselage sides F5c and F6c and come to rest along the back side of F4. Do not
force F8 to follow the upper profile of the parts F5c and F6c.
14. Once properly fit, the rear end of the parts F8 will come together at taper as shown. Do not
bond at this time.
15. Fit fuselage top F9 to the fuselage sides, covering parts F8. Ensure all parts in the fuselage
mate well and fit flush against each other. Bond all parts to each other along mating
surfaces with CA. DO NOT bond the lower portion of the fuselage sides to the lower portion
of the formers (where the formers curve inwards). This will be done at a later step.
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 10
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Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 11
Step 8
F5a/b
F6a/b
F5c
Step 9
Step 10
Step 11
Step 12
Step 13
Step 14
Step 15
F6c
F7
F8
F9
F2
F4
F3
F4
F5a/b
F4
F2
F6a/b
F4
“top”
F6c
F5c
F3
F8
Taper
F5a
F4
F3
F3
F7
Tape
See Note!

Fuselage Continued
Gear Block
16. Fit ply landing gear brace F10 to the bottom of F1, in the slots pair of slots forward of the
receiver tray. DO NOT BOND.
17. Fit ply landing gear brace F11 to the slot on the bottom of F1, immediately behind F10. DO
NOT BOND.
18. Slide ply part F12 between F10 and F11. Ensure that F12 is seated firmly against F1. Tip:
use a scrap piece of 1/32 ply to push F12 all the way down in the pocket created by F10
and F11.
19. To set the proper angle for the gear block, temporarily pull the fuselage sides together,
wrapping around parts F10, F11 and F12. Fit the tabs on F10 and F11 within the
corresponding slot along the bottom of the right and left fuselage sides. Bond F10, F11 and
F12 to F1 only. Do not bond F10 and F11 to the fuselage sides at this time.
Lower Fuselage Assembly
20. Moisten the outside, lower half of the fuselage sides with glass cleaner and allow to soak for
a few minutes.
21. Carefully bend the fuselage sides, bringing them in full contact with the lower curved edges
of formers F2, F3, F4, and F7. Use several strips of low tack masking tape to hold the
fuselage sides in position and allow the fuselage to thoroughly dry. When dry, remove the
tape and bond the lower portion of the fuselage side to the formers.
22. Remove the fuselage bottom F13 from the parts sheet. DO NOT remove the cut-outs in
F13 until directed to do so in a later step. Fit F13 to the bottom of the fuselage, between
the fuselage sides. Ensure that the tabs along the edge fully engage the slots in the
fuselage sides, and that the slots engage the tabs in formers F3 and F7. Ensure that the
front end of F13 laps over the rear portion of the landing gear pocket at F11, but does not
cover the slot in the pocket. Bond F13 to the fuselage with CA.
23. Fit and bond F14 forward of F13, tabbing into the fuselage sides and former F2, lapping
over the forward portion of the landing gear pocket at F10. Ensure that F14 does not cover
the slot in the landing gear pocket. Bond with CA.
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 12
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Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 13
Step 16
F10
F12
F11
Step 17
Step 18
Step 19
Step 20
Step 21
Step 22
Step 23
F13
F14
Moisten
Bottom View
Bottom View
Bottom View
Bottom View
Bottom View
Bottom View
Bottom View
F1
F1
F10
F11
F1
F10
F10/11/12
Bond
Tape
F13
F2
F10
F11
F3
F7
Bottom View

Fuselage Continued
Motor Mount Assembly
24. Fit ply motor mount supports F15 and F16 to the BOTTOM of ply motor mount F17. Tack
glue to retain parts using medium CA glue.
25. Fit and bond motor mount assembly to the front of former F2.
Cowl Assembly
26. Fit nose former F18 to the tabs on the front of F15 and F16. Note: The tabs of parts F15
and F16 will extend beyond the forward surface of part F18 by 1/8 in. Ensure that F18 sits
flush against the front flat of F15 and F16, and bond with CA glue.
27. Fit nose former F19 to the front of F18, over the tabs of parts F15 and 16 protruding forward
of F18. Once satisfied with the fit of these parts bond with CA glue.
28. Create part F20, nose sheeting, by fitting and bonding parts F20a and F20b together.
29. Moisten one side of F20 with glass cleaner and allow to soak for a minute or two. Fit F20 -
moist side out - to the tabs on F2 and F18. Carefully bend the edges of F20 around the top
edge of formers F2 and F18 until the outside edges of parts contact the upper edge of the
right and left fuselage sides. Hold in position with low-tack masking tape until dry. When
completely dry, remove tape, check/adjust the fit of part F22, and bond with CA glue.
30. Moisten one side of bottom sheeting F21 with glass cleaner and allow to soak for a minute
or two. Position F21 over F2 and F18 - moist side out - with the “cut-out” in F21 toward the
back. Carefully bend F20 around the lower radius of formers F2 and F18 until the outside
edges of F21 contact the lower edge of the right and left fuselage sides. Hold in place with
low-tack masking tape until dry. When completely dry, remove tape, check/adjust the fit of
part F21, and bond with CA glue.
Finishing Up!
31. Revisit any parts not previously bonded and lightly bond with thin or medium CA glue. Don’t
go nuts here! - Just bond anything overlooked in assembly. This is a light model and every
gram of CA glue you add to the model adds a gram of weight to the completed model and
excessive weight undesirable.
Now, lightly sand the fuselage with a sanding block loaded with fine grit paper. Be careful
when sanding that you don’t get overzealous and damage the wing rib profile. More
detailed sanding guidance is given in the assembly steps that follow. Turn the page!
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 14
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Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 15
Step 24
F15
F16
F18
Step 25
Step 26
Step 27
Step 28
Step 29
Step 30
Step 31
F17
Bottom View
Bottom View
F19
Bottom View
Bottom View
F20a
F20b
F20
F21
“Bottom”
F17F15
F16 F2
F17
F17
F16
F15
F19
Bottom View
F18
F19
F2
F2
F18
“top”
“top”

Fuselage Continued
Finishing Up! Continued
32. Round the upper edges of the rear fuselage until parts F8 are just barely exposed. For best
results use a sanding block or longer sanding bar loaded with fine grit paper. Work slowly
and trust your eyes!
33. Smooth the seam along the bottom between the fuselage sides and F13, blending the tabs
into the sides, and slightly rounding the seam. Again, following the guidance to use a long
sanding bar here would be highly desirable.
34. Round off the edges of F19, flowing it smoothly into the top and bottom nose sheeting. A
sanding block loaded with fine grit paper works best here.
35. Now, use a sharp hobby knife and carefully remove the cut-outs in the fuselage bottom
leaving three openings to allow access to the radio and pushrods at a later step.
Tail Surfaces
36. Fit the 1/16 in. ply elevator joiner E1 to the right and left elevator halves E2. Use a straight
edge to ensure that the leading edge of E1 and E2 remain parallel. Bond with medium CA
glue.
37. Follow sanding instructions given within the tape hinge diagram, on the plan sheet 2 of 2,
and bevel the bottom of the leading edge of the elevator at a 45 degree angle. Follow the
sanding instructions given on the Horizontal Stabilizer / Elevator detail on sheet 2 of 2 for
guidance sanding the edges of these parts. The plan calls for the leading edge of the
Horizontal Stabilizer to be sanded round while the trailing edge of the Elevator should be
sanded but left square.
38. Fit and bond the balsa rudder part Ra and ply rudder part Rb (tail wheel) together with
medium CA glue. Follow sanding instructions given within the tape hinge diagram, on the
plan sheet 1 of 2, and bevel the left side of the leading edge of the rudder at a 45 degree
angle. Follow the sanding instructions given on the Vertical Stabilizer / Rudder detail on
sheet 1 of 2 for guidance sanding the edges of these parts. The plan calls for the leading
edge of the Vertical Stabilizer to be sanded round while the trailing edge of the Rudder
should be sanded but left square.
Hey, why not take the time right now to paint the tail wheel detail on part Rb black. It will be
much easier to paint now prior to covering and installing on the model.
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 16
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Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 17
Step 32
E2
E2
Step 33
Step 34
Step 35
Step 36
Step 37
Step 38
E1
Ra
Rb
Step 38 Cont.
45 Deg.
45 Deg.
“top”
“Right”
Radius
Radius
Sand
Sand
Radius
Radius
Remove
Paint
F19

Wing
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 W8. Note: Parts W6, W7, and W8 will
not be installed until the Final Assembly.
39. Lay both right and left wing panels W1 - etched side up - on the table. Fit and bond one
each spar W2 within the right and left W1.
40. An arrow etched to parts W3, W4, and W5 indicates the leading edge of the wing ribs. Fit
the end opposite the arrow (trailing edge) of ribs W3, W4 and W5 within the corresponding
notched positions along the trailing edge of the right and left wing panels. The position of
each rib is indicated on the plan - Ensure that each rib is in the correct position before
gluing. Tack glue the trailing edges of the ribs to the wing panels with medium CA.
41. Now, turn the wing panel assemblies over on the table. Bend the leading edge of W1 over
the leading edge of the ribs, engaging the tabs on the ribs with the slots and notches
towards the leading edge of W1. Tack glue ribs to W1 where they interface at tab and notch
locations and along the leading edge of the wing. Hold the completed wing panel
assemblies down on a flat surface and adequately bond all tack glued components
together.
Final Assembly
Covering
42. Seal the bare wood with a light mist of DEFT brand clear lacquer spray and lightly sand as
the lacquer may raise the wood grain. Now, cover the Fuselage, wings (for a cleaner
looking model we suggest lightly painting the underside of the wings in a matching color
prior to covering the top surface), tail surfaces, and one side of W8 with a lightweight
covering material. Paint the struts, control horns, cockpit, motor, and receiver tray interiors
as desired to match your covering scheme. We recommend Stevens AeroModel AeroLITE
covering, DEFT clear lacquer, and Design Master paints. Apply any trim scheme and
markings at this time. Tip: Do not cover the fuselage bottom or rib profile on the fuselage
where later part W6 will be bonded.
Linkage Installation
43. Fit the receiver/ESC/servo brick to the receiver tray, with the geared end of the servos
pointing forward. Fit the edge of the circuit board into the slot in the short arm of the nylon
receiver clip, and GENTLY press down on the forward edge of the receiver until it snaps into
the slot on the longer forward arm. Tip: Support F1 from the cockpit side of the model with
a finger while seating the receiver.
44. Follow the Pushrod Detail on the plan, sheet 2 of 2, to make and install the Rudder and
Elevator pushrods from the supplied lengths of .015 wire. The Rudder pushrod will pass
through the opening in F3, the RIGHT hole in F7, and the upper exit slot on the RIGHT side
of the fuselage. The Elevator pushrod will pass through the CENTER hole in F7, and the
lower exit slot in the LEFT fuselage side.
With the pushrods installed it’s now time to cover the bottom of the fuselage to match your
covering/trim scheme.
45. Follow the tape hinge diagrams on the plan pages to attach the Rudder to the Vertical
Stabilizer (Page 1 of 2), and the Elevator to the Horizontal Stabilizer (Page 2 of 2).
46. Install the Rudder horn on the right side of the Rudder, and the Elevator horn on the lower
left side of the Elevator.
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 18
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Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 19
Step 39
W1
W2
W4
W3
Step 40
Step 41
Step 42
Step 43
Step 44
Step 45
Step 46
Bottom View
Bottom View
Top View
W5
Trailing Edge
Tape
W1
FRONT
Elevator LEFT
Bottom View
Rudder RIGHT
Rudder RIGHT
Elevator BOTTOM

Final Assembly Continued
Linkage Installation Continued
47. Fit the horizontal stabilizer/elevator assembly to the slot in the rear of the fuselage. Ensure
that the stabilizer is perpendicular to the sides of the fuselage, and bond with medium CA
glue.
48. Remove the covering over the slots in the upper rear of the fuselage that will receive the
Vertical Stabilizer / Rudder assembly; Now, fit the Vertical Stabilizer / Rudder assembly to
these slots within the top of the fuselage. Ensure that the Vertical Stabilizer is
perpendicular to the fuselage and Horizontal Stabilizer, and bond with medium CA glue.
49. Pre-shrink the supplied length of heat shrink tube by passing it over two short lengths of
scrap .015 pushrod wire. Shrink tubing with a heat gun then, when cool, remove wires from
tubing and cut tube to length specified in the “Pushrod Detail” on the plan page 2 of 2.
50. Follow the “Pushrod Detail” on the plan to attach the pushrods to the Elevator and Rudder
horns.
Landing Gear
51. Bend the landing gear over the diagram on the Landing Gear Detail on the plan using a
single length of 1/32 inch diameter wire supplied in your kit. Proceed carefully, as accurate
bending is critical to a proper fit.
52. Slide the properly bent landing gear wire into the slot within the fuselage bottom. Retain the
landing gear within the fuselage using fuselage ply part F22. Insert F22 fully into the gear
pocket after the landing gear has been installed. Friction between the gear pocket sides
and F22 should be sufficient to retain the landing gear, but you may wish to wick a little CA
along the slot and around the exit points of the landing gear wire as added security.
53. Fit the provided plastic wheels to the landing gear wire. Bend the wire up at a 90 degree
angle to retain the wheel, then cut off the excess wire.
Motor and Gearbox
54. Remove the pointed mounting studs from the gearbox mounting tabs on the motor gearbox
combo [PKZ3624] and sand the remaining stud protrusions smooth.
Build Instructions
1946 “Say’s Nuh!” C-140 UM Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 20
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