Stevens Aero Model 1911 Caudron Manual

1911 Caudron
Hendon-London Aerial Derby Racer
Wing Span: 18.25 inches | Wing Area: 56 inches2| Average Flying Weight: 1.4 ounces
Version 1.0 (revised 11.01.2013)
Build Instructions
1911 Cuadron 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 the use by the user of the
final user-assembled product. 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 on-line at www.stevensaero.com.
Stevens AeroModel
26405 Judge Orr Rd. - Colorado Springs, CO 80808 - USA
719-387-4187 - www.stevensaero.com
Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 2

Kit Inventory
☐Laser Cut Wood (7 Sheets See “Laser Cut Parts Inventory”)
☐Photo-Illustrated Build Instructions
☐Computer Drawn Detail Pages (2 Pages)
Taped to back of wood brick:
☐1 - 0.032 in. x 12 in. wire (Landing Gear)
☐1 - .020 x 12 in. Carbon Rod (Wing Struts)
☐2 - 0.015 in. x 12 in. wire (Pushrods)
☐Hardware Bag
1 - 1-1/2 in length of 1/16 in. diameter Heat Shrink Tube
1 - Nylon Receiver Clip
1 - Nylon Tail Skid
1 - Pair Plastic Wheels [SIGSH540]
1 - Balsa Part M1
1 - Ply Part F19
Build Instructions
1911 Cuadron 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 [PKZ3352]*
☐Motor/Gearbox [PKZ3624]
☐130mm x 70mm Propellor [EFL9051]
☐130-160 mAh 3.7V LiPo battery.
*SPMAR6410 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 AeroLITE - Antique White
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)
☐Optional Du-Bro 1-1/2” Wheels [DUB150ML]
Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 4

Sheet Wood Inventory (1 of 1)
Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 5

Builders Notes
Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 6

General Assembly Instructions
Thank you, for purchasing this Stevens 1911 Caudron Racer.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 120-240 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
1911 Cuadron Build Instructions. © 2013 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 F1 to F28.
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 and glue the following parts together from sub assemblies: Build part F1 from F1a and
cross piece F1b. Build F14 from F14a and F14b. Build F15 from F15a and F15b.
2. Motor Mount - Lay Ply part F4 on the table with the etched “Top” side facing up. Fit ply
parts F2 and F3 to F4. Orient the arrows on F2 and F3 to point in the same direction as the
arrows on F4.
3. Fit the motor mount assembly to the slots at the front of F1. Ensure that F2 and F3 are
perpendicular to F1 and F4, and that the outer edges of F4 align over the outer edges of F1.
Bond assembly with thin CA.
4. Landing Gear Pocket - Fit ply former F5 to the tabs at the rear of F4, with the tabs along the
top edge (remember, the assembly is “up side down”) fitting in the forward portion of the
multi-dimensional slots in F1. Ensure that F5 rest firmly against F2, F3, and F4, Thus
setting a slightly forward angle to F5.
5. Fit ply part F6 to the wide center portion of the multi-dimensional slot occupied by former
F5. F6 will lay flush against the rear of F5.
6. Fit ply former F7 to the rear portion of the multi-dimensional slots occupied by F5 and F6.
F7 will lay flush against the rear face of F6, thus completing the Landing Gear Pocket.
7. Central Crutch - Fit ply former F8 to the set of slots immediately behind the landing gear
pocket, orienting the edge marked “top” against F1.
8. Fit the Battery Tray between F7 and F8. The tabs at the forward edge of the battery tray -
indicated by the etched arrows - will engage the slots in F7. The tabs at the rear of the
battery tray will rest in the notches along the bottom of the opening in the middle of F8.
Tack glue F7, F8, and the battery tray with tiny drops of medium CA.
Build Instructions
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Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 9
Step 1
Step 2
Step 3
Step 4
Step 8
Step 7
Step 6
Step 5
F1a
F1b
F2
F3
F4
Top
F4
Bottom
F1
F5
F1
Tabs Fill
Forward
Portion of
Slots
F5
F6 Tabs Fill
Center
Portion of
Slots
F7
Tabs Fill
Rear
Portion of
Slots
F8 Top
F7
Battery
Tray
F8
F7
F5 Angles
Forward
Slightly
F14a
F14b
F15b
F15a
Forward
Forward
Forward
Forward
F1
F1
F1

Fuselage Continued
9. Radio Tray - Lay F9 on the table with the etched side facing up. The forward edge of F9 is
indicated by the etched arrows. Note that the tabs on each end of parts F10 and F11 are
different sizes, left to right. These will fit in the appropriate sized slots in F9, thus ensuring
proper left/right orientation. Fit parts F10 and F11 to the nylon receiver clip found in your
hardware bag. Orient the long arm of the receiver clip nearest to F10, with the etched side
of F10 facing toward the long arm. Fit ply parts F10 and F11 to the slots in F9. F10 will fit
in the forward set of slots, and F11 in the rear set of slots. Do not force the fit! If you have
difficulty fitting the receiver tray assembly to F9, double check the orientation of F10 and
F11 - ensuring that the large tabs fit in the large slots, etc. Check the orientation of all parts
with the photo for this step, then bond with CA.
10. Fit the tabs at the forward end of F9 (indicated by the etched arrows) to the notches at the
top of the opening in the middle of former F8 - refer to the photo for this step for proper
orientation.
11. Fit former F12 to the tabs at the rear of F9, and to the slots in F1 directly below. Ensure
that the etched side faces forward.
12. Fit former F13 to the slots in the cross piece F1b, ensuring that the etched side faces
forward.
13. Fuselage Sides - Fit left fuselage side F14 to the tabs on the left side of former F12. Tack
glue F14 to F12 only.
14. Fit right fuselage side F15 to the right side of former F12, tack gluing the two parts together.
15. Pull the fuselage sides together at the rear, engaging the tabs along the side of F1 and
former F13. Square the assembly on a flat surface, and final bond the fuselage side to F1
and the formersF12 and F13.
16. Pull the fuselage sides together in the middle of the assembly, engaging the tabs on F1, F8,
and F9. Square the assembly on a flat surface, and completely bond the fuselage sides to
F1, F8, and F9.
Build Instructions
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Build Instructions
1911 Cuadron 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
F9
F10
F11
Long Arm
Oriented
Forward
F9
F10 F11
F8
F12 Etched Side
Forward
Etched Side
Forward
Rear View
Rear View
F12
F13
Tack Glue
F12
F14
F14
F15
Tack Glue
Bond
Bond
F12
Bottom View
F1
F1b
right
left
Bottom View
right
left
Bottom View

Fuselage Continued
17. Pull the fuselage side together at the front, engaging the tabs on the landing gear pocket
and F1. Bond the fuselage side to the landing gear pocket, F1, and the motor mount.
Ensure that no glue enters the opening in the landing gear pocket.
18. Fuselage Bottom - Fit doubler F16 to the notches at the rear of the fuselage sides. Note
that the notches are extra deep, to allow the tabs on the fuselage bottom to occupy the
same notches. Ensure that F16 is fully seated, leaving recesses to receive the fuselage
bottom.
19. Assemble the fuselage bottom from parts F17a, F17b, F17c, and F17d. Bond with thin CA.
20. Fit the rear portion of the fuselage bottom to the rear portion of the fuselage sides, engaging
the tabs in former F13, and the notches in the fuselage side. Square the assembly on a flat
surface, and bond F17 to the rear portion of the fuselage sides and former F13.
21. Bend the forward portion of the fuselage bottom down, engaging the tabs in formers F7, F8,
and F12, and the notches in the fuselage sides. Square the assembly on a flat surface, and
bond the forward portion of F17 - from former F13 forward - to the fuselage sides and
formers. Ensure that no glue enters the slot in the landing gear pocket.
22. Fit part F18 to the front of the fuselage,engaging the tabs on former F5, and the notches in
the fuselage sides. Bond F18 to the fuselage sides and F5, ensuring that no glue enters
the slot in the landing gear pocket.
23. Turn the fuselage right side up. Fit ply former F19 over the front of the motor mount,
engaging the tabs at the front of F1, and the notches in the fuselage sides and F18. Note
that the motor mount plate must rest on the bottom of the slots in either side of F19, leaving
the top of the slots open to receive the motor, which will be installed in a later step. Bond
with thin CA.
24. Fuselage Top - Fit former F20 to the inner portion of the slots in F1 shared by former F8
below.
Build Instructions
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Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 13
Step 17
Step 18
Step 19
Step 20
Step 24
Step 23
Step 22
Step 21
F16
Recess
F17a
F17c
F17d
F17b
Bond
Bond
F17
F18
F19
Top of
Slot Open
Top View
F20
F1
Bond
Bottom View
F13
F17
forward
F13

Fuselage Continued
25. Fit former F21 to the notch immediately behind former F20. Ensure that both formers are
perpendicular to the surface of F1, then bond them to each other and F1 with thin CA.
26. Locate the three slots spanning the mid-section of F1. Fit former F22 to the wide center
slot. Fit former F23 behind F22, engaging the two outer slots. Ensure that both formers are
perpendicular to the surface of F1, then bond them to each other and F1 with thin CA. Do
not allow glue to fill the notches around the top of former F23.
27. Fit and bond former F24 to the inner portion of the notches in F1b, shared by former F13
below.
28. Fit and bond parts F25a and F25b together to create the nose sheeting.
29. Moisten the top surface of F25 with glass cleaner, and allow it to soak in for a minute or two.
Fit F25 to the tabs in F19 and F20, moist side out. The front of F25 will lie flat along the top
of F19. The rear of F25 will wrap around the top of former F20. Hold F25 in place with low
tack masking tape until completely dry.
30. While F25 is drying, Moisten one side of the cockpit sheeting F26 with glass cleaner and
allow to soak for a minute or two.
31. Fit F26 to the tabs on formers F21 and F22 - the part is symmetrical, so it doesn’t matter
which end goes in front. Wrap F26 around the top of the formers and hold in place with low
tack masking tape until completely dry.
32. When F25 and F26 are completely dry, remove the tape and bond them to the formers and
fuselage sides with a slow setting CA glue.
Build Instructions
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Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 15
Step 25
Step 26
Step 27
Step 28
Step 32
Step 31
Step 30
Step 29
F20
F21
front
F20
F21
F22
F23
F24
F25a
F25b
F25
Engage
Tabs
F26
F26
Engage
Tabs
F1
F1
F1b
F13

Fuselage Continued
33. Fit and bond two stringers F27 to the center two notches in formers F23 and F24, and the
center two slots at the rear of F1.
34. Fit and bond two stringers F28 to the sets of notches and slots immediately outside of
stringers F27
35. Lightly sand the completed fuselage, removing any excess glue, and gently rounding the
corners along the edge of F25 where it contacts F19 and the fuselage sides.
Lay the completed fuselage aside until required in the 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 W6.
36. Build the Right Wing first. Lay wing panel W1(R) on the work surface, etched side up. Fit
and bond the spar W2 to W1(R).
37. Fit ribs W3, W4, and W5 to the slots in the trailing edge of the wing panel. The slots come
in different sizes and positions, matching the tab on the specific rib for that slot. W3 will fit
in the inner slot - nearest the wing root with the tabs on it. W4 will fit in the center slot, and
W5 will fit in the outer slot, near the wing tip. Refer to the detail sheet to ensure proper
placement of the ribs. Do not force the fit! if the rib doesn’t fit the slot, it’s in the wrong
place. Bond the ribs to the trailing edge of the wing only.
38. Turn the wing panel over. Gently wrap the wing panel over the top of the ribs, engaging the
notches and slot along the leading edge to the ribs. Tack glue ribs W3 and W4 where they
fit into the notches, and F5 where it fits into the slot. Hold the wing flat on the work surface
and bond the spar to ribs W3 and W4. Lift the panel from the work surface, and final bond
the ribs to the underside of the panel, ensuring there are no gaps between the ribs and
W1(R).
39. Repeat steps 36 through 38 to build the left wing panel. Begin with W1(L) on the table
etched side up, and proceed as you did for the right wing panel. Take your time before
gluing, and ensure that you are building a mirror image of the right wing, and not two
identical right wings!
Lay the completed wing panels aside until required in the final assembly.
Tail Surfaces
40. Fit ply part V1 to the vertical stabilizer V2, and bond with medium CA glue.
Build Instructions
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Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 17
Step 33
Step 34
Step 35
Step 36
Step 40
Step 39
Step 38
Step 37
F27
F27
F28
F28
W1(R)
Etched Side
Facing Up!
W2
W3
W4
W5
Right Left
V2
V1
W1(L)
W1(R)
W1(R)

Tail Surfaces Continued
41. Lightly sand the vertical stabilizer and the rudder R1. Round the leading edge and top of
the vertical stabilizer, and the top of the rudder. Leave the trailing edge and bottom of the
rudder square.
42. Lay the rudder on the table, etched side down, with the leading edge aligned flush with the
edge of the table. Using a sanding block or small fingernail file, gently sand a 45 degree
bevel along the length of the leading edge.
43. Lightly sand the horizontal stabilizer H, and the elevator E. Round the leading edge and
tips of the horizontal stabilizer, and the tips of the elevator. Leave the trailing edge of the
elevator square.
44. Repeat step 42, and sand a 45 degree bevel in the leading edge of the elevator.
Lay the completed tail surfaces aside until required in the final assembly.
Wheels
If you will be using the stock plastic wheels supplied with the kit, nothing needs to be done
at this time, and you may proceed to the Final Assembly.
If you have purchased the optional spindle wheels [DUB150ML], then follow these steps to
finish the wheels:
45. Fit and bond a balsa wheel disk W to each side of the wheels.
46. Sand the wheel disks to a stream lined shape, arching from the rim over the ends of the
hubs, and back down to the opposite side. Handle with care, as sanding greatly reduces
the thickness of the balsa near the rims, making them vulnerable to crushing at this step.
Lay the completed wheels aside until required in the final assembly.
Final Assembly
Read step 47 in it’s entirety before proceeding.
47. Cover your model with AeroLITE covering material, available from Stevens AeroModel.
The full size 1911 Cuadron was probably covered in unbleached linen - common at the time
- leaving the finish a light cream or tan color. Antique White AeroLite is ideal for this model.
Cover the tail surfaces first, and set them aside.
Cover the fuselage next, leaving the bottom of the fuselage uncovered from former F12
back. This will be covered in a later step after the pushrods have been installed.
Cover the wings on the top surface only. The aerodynamics of this particular airfoil require
it to be single surfaced only, and performance will be significantly reduced if the bottom of
the wings are covered.
Cover the wheel disks with the same material that you used for the rest of the model.
If a matte finished is desired - this would be more “scale appropriate” than the high gloss of
the AeroLite - mist the model with a very light coat of clear lacquer, such as Deft.
Build Instructions
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Build Instructions
1911 Cuadron Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 19
Step 41
Step 42
Step 43
Step 45
Step 47 Cont.
Step 47 Cont.
Step 47
Step 46
R1
V
Round Square
45 deg.
Left
Right
Round
H
E
Round
Round
Square
W
W
Leave Open!
Top Only!
Sand
Cover

Final Assembly Continued
48. Push Rods and Receiver - Refer to the Pushrod Detail on the Detail Sheet. Make a ‘snake
bend’ in one end of a 12 in. long piece of .015 wire.
49. Feed the straight end of the wire through the hole marked ‘R’ (for Rudder) on the left side of
former F12.
50. Continue feeding the push rod through the hole marked ‘R’ on the left side of former F13.
51. Slit the covering over the rear portion of the upper exit slot in the left side of the fuselage,
and pass the pushrod through the slot.
52. Connect the ‘snake bend’ of the push rod to the center hole of the rudder servo, which is the
servo nearest the antenna.
53. Repeat step 48, and make a ‘snake bend’ in one end of the remaining length of .015 wire.
Pass the straight end of this pushrod through the hole mark ‘E’ (for Elevator) on the right
side of former F12.
54. Continue feeding the pushrod through the hole marked ‘E’ on the right side of former F13.
55. Slit the covering over the rear portion of the lower exit slot on the right side of the fuselage,
and pass the push rod through the slot.
Build Instructions
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