AMR 25% Super Decathlon User manual

-AMR 25% Super Decathlon-
Building manual
-96’’ wing span---64 ½’’ fuselage---1 488 Sq. In.---35/50cc engine-
www.amr-rc.com
October 24, 2012

-Warranty-
Aircraft Modelers Research Incorporated guarantees this kit to be free from defect 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 Aircraft Modelers
Research’s liability exceed the original cost of the purchased kit. Further, Aircraft
Modelers Research reserves the right to change or modify this warranty without notice.
Aircraft Modelers Research has no control over the final assembly or materials used for
final assembly, no liability shall be assumed nor accepted for any damage resulting from
use by the user of the user-assembled product. By the act of using the user-assembled
product, the user accepts all resulting liability
Buyers must be prepared to accept all reasonable liability associated with the assembling
and use of this product. All returns of kits, parts or components thereof must necessarily
be approved by the manufacturer of the product before mailing.

3
Introduction
Thank you for purchasing AMR product. AMR (Aircraft Modelers Research) prides itself on bringing you the finest aircraft
model kits due to our team efforts and our state of-the-art equipment that affords exceptional quality. Using CNC driven
production equipment, each of our kits is individually laser-cut according to plans which includes custom fittings and
hardware sets specific to your model. We, as the kit manufacturer, provide you with a top quality kit and instructions.
However, the quality and flying ability of your finished model depends on how you build it; therefore, we cannot in any
way guarantee the performance of your completed model and no representations are expressed or implied as to the
performance or safety of your completed model.
Before starting to build, use the Part List on the next pages to take an inventory of your kit to make sure it is complete and
inspect the parts to make sure they are of acceptable quality. Remember to take your time and follow the instructions to
end up with a well-built model that is straight and true. If any parts are missing, not of acceptable quality or if you need
assistance with assembly, contact AMR Customer Service. When reporting defective or missing parts, use the part number
exactly as they are written.
Enjoy !
The AMR Team
Customer Service
Aircraft Modelers Research
2550 Chemin du Lac
Longueuil, Quebec, J4N 1G7
Canada
www.amr-rc.com
Phone: [phone]
Fax: [phone]
[email protected]

4
Before you begin, important notes from A.M.R
1-) This model airplane is not a toy. It must be built with outmost care. It is imperative that you follow each steps of
the building manual. If you need assistance of any kind, please contact us directly.
2-) Adhesives:
a-) For general assembly, wood glue works best.
b-) C.A adhesives can be used. However, their high-toxic level makes them uncomfortable for some builders.
c-) IMPORTANT: For hi-strength sections, you must use “Structural Epoxy” types, not the 5 or 30-minute types
available in most hobby shops. In this manual, you will notice that some assemblies do mention “use epoxy” and
you must do so. Structural epoxies penetrate deep into the wood fibbers, creating a very strong bond. We
recommend these brands: G2 Epoxy kit, T88 Epoxy or West Systems. They are available from any Aircraft or
Marine specialty shops in convenient sizes. Carefully follow their mixing ratios.
3-) We recommend that all control horns be 8-32 types (no less) and that all screws/nuts be secured with thread
locker.
4-) A straight airframe is the only way to go. Make sure that you have a straight building surface before you begin
building.
5-) Sanding bars: Using ½” balsa planking (not included) make 3 of them, 3” wide x 18” long with some 100, 180 and
280 grit sand paper.
6-) If something looks wrong, it probably is. Make sure that you follow the building sequences with the appropriate
part number.
7-) Take your time and verify the alignment before final gluing. This extra caution will eliminate possible frustrations.

5
W
Balance your plane carefully. Use servos that provides sufficient torque and high power batteries to
fly this aircraft.
Recommended engines: Any good 30 to 50CC engines are suitable for this plane. It is strongly
recommended to stay within this range. Failure to follow this recommendation may damage the
airplane since it is not design for larger engines.
The plane fly very well when properly balanced and trimmed. First flight should be done by
experienced pilot only even if it is easy to fly once trimmed.

6
A.M.R 25% Decathlon hardware list
Description
Quantity
Description
Quantity
Tailwheel bracket
1
4-40 x 1/2'' Cap screws
16
Servo Lead tubes/48'' long
3
4-40 x 3/4'' Cap screws
6
Robart 3/16'' Hinge points
24
4-40 x 1 1/4'' Cap screws
6
Robart 1/8 " Hinge points
2
4-40 x 1 1/2'' Cap screws
2
Wheels
2
6-32 x 5/8'' Cap screws
2
Main landing gear/pair
1
8-32 x 1 1/4'' Cap screws
6
#4 x 3/4'' Wood screws
12
1/4-20 x 1'' Cap screws
2
#4 x 1/2'' Wood screws
24
4-40 Nylon nuts
52
7/8'' x 24'' Alu. Wing tube + socket
1
6-32 Nylon nuts
2
.058'' Flying wire
4 foot
4-40 Blind nuts
8
Sullivan steel tabs
8
6-32 Blind nuts
2
.032'' x 4'' x 10'' Alu. sheet
1
8-32 Blind nuts
6
Glass wing tips
2
1/4-20 Blind nuts
2
Glass wheel pants
2
Sullivan Control Horns
4
Glass cowling
2 pieces
Sullivan Control Horns/rudder
1
Glass dashboard
1
Strut Bracket #SD50BR5
2
Window set
1
Flying wire bracket #SD50BR1
1
10-32 x 2'' Cap screws/axels
2
Strut support Bracket # SD50BR3
10
4-40 Eye hooks
6
Fuse strut bracket #SD50BR2
2
Sullivan Clevises
4
Inter-Strut Wing bracket
4
#4 Washers
16
Dubro Steel Straps
4
4-40 x 5/8'' Cap screws
16
3/16'' x 36'' Brass tube
1

7
A.M.R 25% Decathlon wood list
Description
Quantity
1/8'' x 1/2'' x 48'' Balsa sticks
10
1/8'' x 1/2'' x 48'' Balsa sticks
4
1/8'' x 4'' x 48'' Balsa sheets
11
1/4'' x 1/4'' x 36'' Balsa sticks
8
1/4'' x 3/8'' x 48'' Balsa sticks
1
3/8'' x 3/8'' x 36'' Balsa sticks
8
3/8'' x 1/2'' x 24'' Balsa sticks
1
1/2'' x 1'' x 48'' Balsa sticks
2
1/4'' x 1/2'' x 48'' Hardwood
8
3/8'' x 3/8'' x 48'' Hardwood
1
1/2'' x 48'' Triangular/Hardwood
1
3/4''x 3/4'' x 6'' Hardwood
1
Small struts/Hardwood
2
Large struts/Hardwood
2
3/8'' x 6'' Dowel
1
5/8'' x 6'' Dowel
1

8
NOTICE TO BUILDER:
Working Surface:
A flat surface at least 24 X 72 inches is require to build this model. It is
important the surface is flat to guaranty straight building.
Wood :
After removing parts from the laser cut plywood and balsa, it is highly
recommended to keep some scrap pieces for later use during the build.
Tools:
Long sanding block, X-Acto cutter or razor blades, modeling saw, masking tape,
ruler, square, small plane (to rough leading edge or other parts), various power
tools as available.
ALWAYS DRY FIT PARTS PRIOR APPLYING ANY GLUE

FUSELAGE ASSEMBLY
Follow directions carefully
Always dry fit first
Assemble all components on a flat building board
9

STEP1
FC1A FC1B
1-install on a flat building surface a sheet of waxed paper
2-Dry fit FC1A and FC1B to make sure it fit properly.
Notice door location should be on the left side since the fuselage is build from the bottom
2-Once fit is found correct, apply glue to join both parts as shown. Assembly will be done over FC1 assembly.
STEP2
10
1-Dry fit assembly of (2) F1A and (2) F1B and 1 F1C as shown.
2-Once fit is found correct, apply glue to join both parts.
3-Use #2 X 5/8 wood screws as shown to secure F1C
F1B
F1A
F1C
F1B
F1A
#4 X 5/8 wood screws (10)

STEP3
F1 5/8 triangular stick on both sides
1-Dry fit STEP2 assembly on F1 to make sure it fit properly.
2-Once fit is found correct, apply glue to join both parts as shown.
3-Cut (2) 1/2 triangular hardwood sticks 3 inches long and glue behind F1 as shown
11

STEP4
F31
F2A
1-Install (2) 6-32 blind nuts and apply glue around nut flanges
2-Dry fit F31 to F2A and F3A. Once fit is found correct, apply glue to join both parts as shown.
F3A
6-32 BLIND NUTS
STEP5
1-Glue F23 over F22 and make sure to align holes properly. Notice that F23 is wider than F22.
2-Glue F24 over F23 and make sure to align holes properly. Notice that F24 is the same width than F23.
3-Install (6) 8-32 blind nuts as shown on F24. Apply glue around blind nut flanges
8-32 BLIND NUTS
F24
F23
F22
12

STEP6
F2
STEP5 ASSEMBLY
1-Install (2) 6-32 blind nuts and apply glue around nut flanges
2-Dry fit F31 to F2A and F3A. Once fit is found correct, apply glue to join both parts as shown.
F3
NOTICE: 2 BLIND
NUTS ROW NEAR F2
STEP7
13
1-Dry fit first. Install STEP6 assy and F4 to F9.
2-Glue all parts over FC1. Make sure that they are perpendicular to FC1 assy.
STEP6 assy F4 F5 F6 F7 F8
F9

STEP8
FSL
1-Dry fit (2) FS and (2) F10 to assembly as shown
2- Glue both parts as shown. F10
STEP9
14
1-Glue (2) 3/8 sq balsa 28in long on rear of fuselage
2-Fit and glue ¼ sq balsa as shown
1/4sq balsa sticks
On both sides
3/8sq balsa sticks
On both sides
Trim 1/4sq balsa
to fit 3/8 sq stick
1/8
Top view
side view
Do not sand the side of 3/8 balsa
at this time
FSR

STEP10
FB
1-Dry fit FB over assembly as shown
2- Glue FB as shown.
STEP11
15
1-Dry fit and glue STEP4 assembly, F4A and F5A as shown
STEP4 assembly
(F2A, F3A and F31)
F4A F5A

STEP12
1/4 X 3/8 balsa sticks
1-Cut (2) 1/4 X 3/8 28 inches long balsa sticks
2-Glue sticks as shown between F3A and F6 as shown. Trim excess flush with F3A.
STEP13
16
1-Use F11 to mark line on 3/8sq balsa stick and remove material 1/8 deep as shown prior installing F11 and F11A
Use F11 over 3/8 stick to mark line and
remove material 1/8 deep
F3A F6

STEP14
1-Install (2) 4-40 t-nuts under F11A as shown
2-Glue F11A flush with balsa cut-out made at step 13 as shown. T-nuts must be inside.
STEP15A
17
1-Glue F11 over F11A.
2-Drill 1/4 dia hole in 3/8 balsa at 1 ¾ inch from existing hole
(use tail wheel to locate the hole properly)
3-Glue 1/4 dia dowel 3/4 inch long
4-Drill 5/64 (2mm) dia hole in the center of the dowel
Glue 1/4 dia dowel
And drill 5/64 dia hole in center
F11A
F11
Drill ¼ dia hole
F11A
1 ¾’’

STEP15B
1-Cut and glue 3/8sq sticks to brace rear of fuselage bottom as shown
18
2-Cut and glue 3/8sq balsa sticks to brace sides of rear fuselage as shown as shown.

STEP16A
1-Move fuselage so that the front end is a bout an inch in front of building table.
2-Dry fit first and glue F1 assembly (step2) to fuselage assembly as shown.
3-Cut (2) 1/2 triangular hardwood sticks 5 inches long and glue them inside fuselage as shown on both sides.
19
Glue 1/2 triangular
hardwood both sides
STEP2 assembly (F1)

STEP16B
1-Glue (2) F13A inside fuselage (one on each sides). F16A must contact F2 and the
¼ sq balsa stick located on the bottom of the fuselage
2-Cut (2) 3/8 X ½ X 7 11/32 inches long hardwood sticks and glue them in slot found in F13A as shown.
3-Locate F13 over the hardwood block and drill 4 holes in hardwood stick using holes found in F13
4-Use (4) No2-1/2 long screws to secure F13. This plate is used for throttle and choke servo installation.
NOTE: It is highly recommended to install these servos prior completing the sheeting.
20
Hardwood sticks
3/8 X 1/2
F13A
F13