Required Tools and Adhesives
UltraCote Covering Colors
Before Starting Assembly
Radio and Power Systems Requirements
Instructions for Disposal of WEEE by Users in the European Union
Warranty Period
Limited Warranty
Damage Limits
Safety Precautions
Questions, Assistance, and Repairs
Inspection or Repairs
Warranty Inspection and Repairs
Non-Warranty Repairs
Safety, Precautions, and Warnings
Contents of Kit
Hinging the Control Surfaces
Landing Gear Installation
This manual is divided into sections to help make assembly easier to understand, and to provide breaks between each
major section. In addition, check boxes have been placed next to each step to keep track of each step completed. Steps
with a single box (
repeating, such as for a right or left wing panel, two servos, etc. Remember to take your time and follow the directions.
) are performed once, while steps with two boxes ( ) indicate that the step will require
• 30-Minute Epoxy (HAN8002) • Formula 560 Canopy Glue (PAAPT56)
• CA Remover/Debonder (PAAPT16) • Pacer Z-42 Threadlock (PAAPT42)
UltraCote Covering Colors
• Cub Yellow HANU884
Before Starting Assembly
Before beginning the assembly of the Piper J-3 Cub, remove each part from its bag for inspection. Closely inspect
the fuselage, wing panels, rudder, and stabilizer for damage. If you find any damaged or missing parts, contact the
place of purchase.
If you find any wrinkles in the covering, use a heat gun or sealing iron to remove them. Use caution while working around
areas where the colors overlap to prevent separating the colors.
HAN101 – Sealing Iron
HAN100 – Heat Gun
HAN141 – Sealing Iron
Sock
HAN150 – Covering Glove
3
Radio and Power Systems Requirements
• 4-channel radio system (minimum) w/receiver • Large Servo Arms (JRPA212) (3 pkgs)
• 12-Inch Servo Lead Extension (JRPA098) • JR Charge Jack Switch (JRPA004)
• Y-harness (Ailerons) (JSP98020) (Required when using 4-channel radio)
• DS821 Digital Sport Hi-Torque Servo (JRPS821) (JSP20071) (6) or equivalent
The elevator installation will require:
Two servos and mixing through the radio
Or
Two servos and a JR® MatchBox™ (JPA0900) or a 6" standard reversing Y-harness (EXRA320)
Or
A standard rotation servo and a reverse rotation servo and a standard Y-harness
Recommended JR®, JR SPORT™ and Spektrum™ Systems
• XP9303 • XP7202
• DX7 • XP6102
• XS600
Recommended Setup–Gas/Glow
• Zenoah
®
20cc Electronic Ignition(ZENE20EI), OR
• 38mm stand-offs (Zenoah only) (EVO3307)
• RF choke ring (gas only) (JRPA029)
• Saito
™
180 AAC with Muffler (SAIE180 or SAIE180GK)
• Muffler Right Angle Adapter (Saito only) (SAI120S140)
• 16x6 Propeller
• Propeller nut
Recommended Setup–Electric
• E-flite
®
Power 110 BL Outrunner Motor (EFLM4110A)
• Castle Creations 85A ESC (CSEPHX85HV)
• 2 Thunder Power 8–9S Li-Po Battery Packs
• Propeller ((APC17010E) or (APC18080E)
• Propeller nut
FS One
With FS One
™
you get more than photorealistic fields, gorgeous
skies and realistic-looking aircraft. You get incredibly advanced
aerodynamic modeling that simulates every possible aspect
of real-world flight.
Spektrum DX7
JR XP9303
JR XP6102
E-Flite Power 110
EFLM4110A
Saito 1.80 Golden Knight AAC
SAIE180GK
Zenoah 20cc
ZENE20EI
HANS2000
4
Warranty Period
Exclusive Warranty- Horizon Hobby, Inc., (Horizon) warranties that the Products purchased (the "Product") will be free
from defects in materials and workmanship at the date of purchase by the Purchaser.
Limited Warranty
(a) This warranty is limited to the original Purchaser ("Purchaser") and is not transferable. REPAIR OR REPLACEMENT
AS PROVIDED UNDER THIS WARRANTY IS THE EXCLUSIVE REMEDY OF THE PURCHASER. This warranty covers only
those Products purchased from an authorized Horizon dealer. Third party transactions are not covered by this warranty.
Proof of purchase is required for warranty claims. Further, Horizon reserves the right to change or modify this warranty
without notice and disclaims all other warranties, express or implied.
(b) Limitations- HORIZON MAKES NO WARRANTY OR REPRESENTATION, EXPRESS OR IMPLIED, ABOUT NONINFRINGEMENT, MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OF THE PRODUCT. THE
PURCHASER ACKNOWLEDGES THAT THEY ALONE HAVE DETERMINED THAT THE PRODUCT WILL SUITABLY MEET
THE REQUIREMENTS OF THE PURCHASER’S INTENDED USE.
(c) Purchaser Remedy- Horizon's sole obligation hereunder shall be that Horizon will, at its option, (i) repair or (ii)
replace, any Product determined by Horizon to be defective. In the event of a defect, these are the Purchaser's exclusive
remedies. Horizon reserves the right to inspect any and all equipment involved in a warranty claim. Repair or replacement
decisions are at the sole discretion of Horizon. This warranty does not cover cosmetic damage or damage due to acts of
God, accident, misuse, abuse, negligence, commercial use, or modification of or to any part of the Product. This warranty
does not cover damage due to improper installation, operation, maintenance, or attempted repair by anyone other than
Horizon. Return of any goods by Purchaser must be approved in writing by Horizon before shipment.
Damage Limits
HORIZON SHALL NOT BE LIABLE FOR SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES, LOSS OF PROFITS OR
PRODUCTION OR COMMERCIAL LOSS IN ANY WAY CONNECTED WITH THE PRODUCT, WHETHER SUCH CLAIM
IS BASED IN CONTRACT, WARRANTY, NEGLIGENCE, OR STRICT LIABILITY. Further, in no event shall the liability of
Horizon exceed the individual price of the Product on which liability is asserted. As Horizon has no control over use,
setup, final assembly, modification or misuse, no liability shall be assumed nor accepted for any resulting damage or
injury. By the act of use, setup or assembly, the user accepts all resulting liability.
If you as the Purchaser or user are not prepared to accept the liability associated with the use of this Product, you are
advised to return this Product immediately in new and unused condition to the place of purchase.
Law: These Terms are governed by Illinois law (without regard to conflict of law principals).
Safety Precautions
This is a sophisticated hobby Product and not a toy. It must be operated with caution and common sense and requires
some basic mechanical ability. Failure to operate this Product in a safe and responsible manner could result in injury
or damage to the Product or other property. This Product is not intended for use by children without direct adult
supervision. The Product manual contains instructions for safety, operation and maintenance. It is essential to read
and follow all the instructions and warnings in the manual, prior to assembly, setup or use, in order to operate correctly
and avoid damage or injury.
5
Questions, Assistance, and Repairs
Your local hobby store and/or place of purchase cannot provide warranty support or repair. Once assembly, setup or
use of the Product has been started, you must contact Horizon directly. This will enable Horizon to better answer your
questions and service you in the event that you may need any assistance. For questions or assistance, please direct your
email to productsupport@horizonhobby.com, or call 877.504.0233 toll free to speak to a service technician.
Inspection or Repairs
If this Product needs to be inspected or repaired, please call for a Return Merchandise Authorization (RMA). Pack
the Product securely using a shipping carton. Please note that original boxes may be included, but are not designed
to withstand the rigors of shipping without additional protection. Ship via a carrier that provides tracking and insurance
for lost or damaged parcels, as
at our facility. A Service Repair Request is available at www.horizonhobby.com on the “Support” tab. If you do not
have internet access, please include a letter with your complete name, street address, email address and phone number
where you can be reached during business days, your RMA number, a list of the included items, method of payment
for any non-warranty expenses and a brief summary of the problem. Your original sales receipt must also be included
for warranty consideration. Be sure your name, address, and RMA number are clearly written on the outside of the
shipping carton.
Horizon is not responsible for merchandise until it arrives and is accepted
Warranty Inspection and Repairs
To receive warranty service, you must include your original sales receipt verifying the proof-of-purchase
date. Provided warranty conditions have been met, your Product will be repaired or replaced free of charge. Repair or
replacement decisions are at the sole discretion of Horizon Hobby.
Non-Warranty Repairs
Should your repair not be covered by warranty the repair will be completed and payment will be
required without notification or estimate of the expense unless the expense exceeds 50% of the retail
purchase cost. By submitting the item for repair you are agreeing to payment of the repair without notification. Repair
estimates are available upon request. You must include this request with your repair. Non-warranty repair estimates will
be billed a minimum of ½ hour of labor. In addition you will be billed for return freight. Please advise us of your preferred
method of payment. Horizon accepts money orders and cashiers checks, as well as Visa, MasterCard, American Express,
and Discover cards. If you choose to pay by credit card, please include your credit card number and expiration date. Any
repair left unpaid or unclaimed after 90 days will be considered abandoned and will be disposed of accordingly.
note: non-warranty repair is only available on electronics and model engines.
Electronics and engines requiring inspection or repair should be shipped to the following address:
Horizon Service Center
4105 Fieldstone Road
Champaign, Illinois 61822
Please
All other Products requiring warranty inspection or repair should be shipped to the following address:
Horizon Product Support
4105 Fieldstone Road
Champaign, Illinois 61822
Please call 877-504-0233 with any questions or concerns regarding this product or warranty.
6
Safety, Precautions, and Warnings
This model is controlled by a radio signal that is subject to interference from many sources outside your control. This
interference can cause momentary loss of control so it is advisable to always keep a safe distance in all directions around
your model, as this margin will help to avoid collisions or injury.
• Always operate your model in an open area away from cars, traffic, or people.
• Avoid operating your model in the street where injury or damage can occur.
• Never operate the model into the street or populated areas for any reason.
• Never operate your model with low transmitter batteries.
• Carefully follow the directions and warnings for this and any optional support equipment (chargers, rechargeable
battery packs, etc.) that you use.
• Keep all chemicals, small parts and anything electrical out of the reach of children.
• Moisture causes damage to electronics. Avoid water exposure to all equipment not specifically designed and protected
for this purpose.
Contents of Kit
Replacement Parts
A. HAN4551 25% J-3 Cub Fuselage
B. HAN4552 25% J-3 Cub Left Wing w/Aileron
C. HAN4553 25% J-3 Cub Right Wing w/Aileron
D. HAN4554 25% J-3 Cub Stab and Elevator Set
E. HAN4555 25% J-3 Cub Rudder
F. HAN4556 25% J-3 Cub Cowl
G. HAN4559 25% J-3 Cub Window Set
H. HAN4562 25% J-3 Cub Wing Strut Set
HAN4561 25% J-3 Cub 4
HAN4563 25% J-3 Cub Wing Strut Pins w/Keepers
HAN4564 25% J-3 Cub Tailwheel Assembly
HAN4565 25% J-3 Cub Decals
HAN4566 25% J-3 Cub Pilot Figure
HAN4567 25% J-3 Cub Dash Panel
HAN4568 25% J-3 Cub Pushrod Set
HAN4569 Side and Top Window Set
HAN4570 25% J-3 Cub Tail Wire Set
HAN4571 25% J-3 Cub Interior Seat Set
1
/
-inch Wheels (pr)
4
A
E
B
C
D
H
7
Hinging the Control Surfaces
Required Parts
• Stabilizer (2) • Elevator (2)
• Wing (left and right) • Rudder
• Aileron (left and right) • Fuselage
• CA hinge (19)
Required Tools and Adhesives
• Rotary tool • T-pins
• Thin CA
• Drill bit: 1/16-inch (1.5mm)
Step 1
Use a rotary tool and 1/16-inch (1.5mm) drill bit to drill a
hole in the center of each of the three hinge slots in both
of the stabilizers.
Step 3
Position the hinge in the stabilizer. The slot in the hinge
will align with the hole drilled in the stabilizer.
Step 4
Slide the hinges in the elevator. Position the stabilizer
and elevator so there is as little gap between the two as
possible without restricting movement. Align the tips of
the stabilizer and elevator.
Note: While your rotary tool is out,
drill the holes in the elevators, ailerons,
wing, rudder and fin as well.
Step 2
Place a T-pin in the center of three CA hinges.
8
Hinging the Control Surfaces
Step 5
Apply thin CA to the top and bottom of each of the three
hinges. Make sure to saturate each hinge so there is
enough CA to wick into the hinge and bond with the
surrounding wood.
Note: Do not use CA accelerator on the
hinges. The CA must be allowed to wick
fully into the hinge to provide the best bond
between the hinge and the surrounding wood.
Step 7
Flex the elevator up and down a number of times to break
in the hinges.
Step 6
Allow the CA plenty of time to cure. Once cured, pull on
the elevator and stabilizer to make sure the hinges are
fully glued into position.
9
Hinging the Control Surfaces
Step 8
Repeat Steps 1 through 8, and using five hinges per
aileron, hinge the ailerons to the wing panels.
Landing Gear Installation
Step 9
Repeat Steps 1 through 8, and using three hinges, hinge
the rudder to the fin/fuselage.
Required Parts
• Fuselage • Wheel assembly (2)
• Wheel axle (2) • Cross brace
• Wing strut tab (2) • 4-40 locknut (6)
• 4-40 setscrew (2)
• Assembled shock strut (2)
• Wheel collar w/setscrew (2)
• Main gear strut (right and left)
• 4-40 x 1/2-inch socket head screw (2)
• 4-40 x 5/8-inch socket head screw (4)
• 8-32 x 3/4-inch socket head screw (8)
• #2 x 5/8-inch sheet metal screw (8)
Required Tools and Adhesives
• Threadlock
• Hex wrench (included in kit for wheel collars)
• Phillips screwdriver (#1)
• Hex wrench: 3/32-inch, 1/8-inch
• Nut driver: 1/4-inch
Step 1
Locate the left and right main gear struts and the wing
strut tab. Attach the front of the landing gear using two
8-32 x 3/4-inch socket head screws. The rear is also
secured to the fuselage using four 8-32 x 3/4-inch socket
head screws, but the wing strut tabs are positioned
between the landing gear and fuselage.
Note: Be sure the 6-32 bolts that
secure the landing gear legs to the
landing brackets are snug to minimize
vibration, but allow for movement
10
Note: Use threadlock on the
8-32 x 3/4-inch socket head screws
to prevent them from vibrating loose in flight.
Landing Gear Installation
Note: In Step 2, leave the screws
loose in the gear until all the struts
and cross brace are in position.
Step 2
Use two 4-40 x 5/8-inch socket head screws and two
4-40 locknuts to attach the shock struts to the main
landing gear struts. The cross brace also uses two
4-40 x 5/8-inch socket head screws and 4-40 locknuts
to attach to the gear near the fuselage. Last, use two
4-40 x 1/2-inch socket head screws and two 4-40
locknuts to attach the shock struts to the cross brace.
Step 4
Secure the wheel collar to the axle by tightening
the setscrew onto the flat of the axle with the included
hex wrench.
Note: Use threadlock on the setscrew to
prevent it from vibrating loose in flight.
Step 3
Locate the main wheel and remove the front and rear hubs
from the wheel.
Step 5
Slide the rear hub into the wheel. The rear hub is
identified as the one without the holes going through the
hub for the screws. Slide the longer portion of the axle
into the hub, then slide the front hub into the wheel.
Note: The photo does not show
the wheel to illustrate how the wheel
collar is placed between the two wheel
hubs to hide the wheel collar.
11
Landing Gear Installation
Step 6
The front and rear hubs will key together when
installed properly. Once installed, use four #2 x 5/8-inch
sheet metal screws to secure the hubs together. Check
the rotation of the wheel when installing the screws.
If the wheel does not rotate, loosen the screws slightly
until it does.
Step 8
To complete the wheel installation, snap the hub cap
onto the wheel.
Step 9
Repeat Steps 3 through 8 to install the remaining wheel.
Step 7
Use a 4-40 setscrew to secure the axle to the main landing
gear.
Note: Use threadlock on the setscrew to
prevent them from vibrating loose in flight.
12
Stabilizer Installation
Required Parts
• Fuselage assembly • Stabilizer/elevator (2)
3
• 6
/8-inch (162mm) joiner • #6 washer (4)
• Tail wheel assembly • 2-56 nut (4)
• 4-40 locknut (3)
• Large strut support bracket (2)
• Small strut support bracket (2)
• #6 x 5/8-inch sheet metal screws (2)
• 4-40 x 5/8-inch socket head screw (3)
• Support rod w/clevis, 10-inch (254mm) (2)
• Support rod w/clevis, 9
1
/2-inch (241mm) (2)
• 6-32 x 3/4-inch socket head screw (4)
Required Tools and Adhesives
• Threadlock
• Hex wrench: 3/32-inch, 7/64-inch
Step 1
Slide the 6
in the stabilizer.
3
/8-inch (162mm) joiner into the forward hole
Step 2
Slide the stabilizer into the slot in the fuselage. Use two
6-32 x 3/4-inch socket head screws and two #6 washers
to secure the stabilizer.
Note: Leave the screws loose until
instructed to tighten them.
Step 3
Slide the remaining stabilizer into the slot in the fuselage.
The tubes from the first stabilizer will key into the second
stabilizer. Use two 6-32 x 3/4-inch socket head screws
and two #6 washers to secure the stabilizer. Once all four
screws have been started, tighten each one, but avoid
crushing the underlying wood.
Note: Use threadlock on the four 6-32 screws
to prevent them from vibrating loose in flight.
13
Stabilizer Installation
Step 4
Attach the tail wheel assembly to the fuselage using two
#6 x 5/8-inch sheet metal screws. The forward screw
goes through the gear and into the fuselage, while the rear
screw goes through the two large strut support brackets,
then through the gear and into the fuselage.
Step 5
Attach the two small strut support brackets to the fin
using a 4-40 x 5/8-inch socket head screw and a 4-40
locknut. There will be a bracket on the right and left of
the fin when complete.
Step 6
Remove the clevis from each of the support rods. Use a
hobby knife to clean the paint from the threads. Thread a
2-56 nut onto the threads, then replace the clevis.
Step 7
Use a 4-40 x 5/8-inch socket head screw and 4-40
locknut to attach the support rods to the stabilizer. The
longer 10-inch (254mm) rod attaches to the top of the
stabilizer, while the shorter 9
attaches to the bottom of the stabilizer.
1
/2-inch (241mm) rod
14
Step 8
Clip the clevis to the strut support bracket. It will be
necessary to adjust the position of the clevis to ensure
the support rods are not causing any twists between the
fuselage, stabilizer and fin. Tighten the nuts against the
clevises once all adjustments have been made.
Stabilizer Installation
Note: Use threadlock on the nuts and clevises
to prevent them from vibrating loose in flight.
15
Aileron Servo Installation
Required Parts
• 4-40 metal clevis (4) • 4-40 nut (4)
• Wing panel (right and left)
• Servo hatch cover (right and left)
• 2-56 x 1-inch machine screw (6)
3
• 4
/4-inch (120mm) pushrod (2)
• #2 x 1/2-inch sheet metal screw (8)
• Nylon control horn w/backplate (2)
• 3/4 x 11/16 x 7/16-inch (19 x 17 x 11mm)
servo mounting blocks (4)
• Safety fuel tubing (4)
Required Tools and Adhesives
• Drill • 30-minute epoxy
• Servo (2) • Long servo arm
• String • Weight
• Phillips screwdriver • Threadlock
• Felt-tipped pen • Tape
• Thin CA
• 18-inch (457mm) servo extension (2)
• Drill bit: 1/16-inch (1.5mm), 5/64-inch (2mm)
Step 1
Step 2
Install a long servo arm onto the aileron servo. Remove
the excess arms that will not extend out from the wing.
Position the servo so the arm is centered in the opening
for the arm. Use a felt-tipped pen to mark the location of
the servo on the cover.
Note: The mounting tabs for the servo
must not extend beyond the servo cover.
If so, reposition the servo before marking
its location on the servo cover.
Locate the servo hatch cover and test fit it into position,
There is a right and left cover, so make sure when the
hatch is positioned, the slot for the servo arm lines up.
Step 3
Locate two of the 3/4 x 11/16 x 7/16-inch (19 x 17 x
11mm) servo mounting blocks. Position the blocks so
they align with the marks made in the previous step. Use
30-minute epoxy to glue the blocks to the cover. Allow the
epoxy to fully cure before proceeding.
16
Aileron Servo Installation
Step 4
Repeat steps 1 through 3 to prepare the remaining cover
while the epoxy cures.
Step 5
Position the servo between the block and with a small
space between the servo and cover. Use a felt-tipped pen
to mark the locations for the servo mounting screws onto
the blocks.
Step 7
Use string or a commercially available connector to secure
a 18-inch (457mm) servo extension to the servo lead.
Step 8
Tie a weight to a 24-inch (610mm) piece of string. Lower
the weight into the wing and pull it out at the opening for
the servo cover.
Step 6
Drill the marked locations using a drill and 1/16-inch
(1.5mm) drill bit. Use the hardware provided with the
servo to secure it to the blocks.
17
Aileron Servo Installation
Step 9
Tie the string to the end of the servo extension and use it
to pull the extension through the wing. Use a piece of tape
to keep the extension from falling back into the fuselage.
Step 10
Position the servo hatch cover and secure it using four
#2 x 1/2-inch sheet metal screws. After installing the
screws, remove them and apply a few drops of thin CA to
the holes to harden the wood to prevent the screws from
vibrating loose.
Step 11
Assemble the aileron pushrod by sliding the safety
fuel tubing onto two metal clevises. Thread the two
metal clevises and two 4-40 nuts onto a 4
(120mm) pushrod.
3
/4-inch
18
Align holes with hinge line
Aileron Servo Installation
Step 12
Attach one end of the linkage to the servo horn. Remove
the backplate from a nylon control horn and attach the
other end of the linkage to the horn. Position the horn
on the aileron with the holes in the horn aligned with the
hinge line of the aileron. Use a felt-tipped pen to mark the
location for the three control horn mounting screws.
Step 14
Secure the control horn to the aileron using three 2-56 x
1-inch machine screws and the control horn backplate.
Step 13
Use a 5/64-inch (2mm) drill bit to drill the three holes
for the control horn screws. Apply a few drops of thin CA
into each hole to harden the wood to aid in preventing the
wood from being crushed when the horn is installed.
Note: Once the length of the linkage
has been adjusted, use threadlock on
the nuts and clevises to prevent them
from vibrating loose in flight.
Step 15
Repeat Steps 5 through 14 to install the remaining aileron
servo and linkage.
19
Radio Installation
Required Parts
• Fuselage assembly • 4-40 nut (4)
• Metal clevis (4) • Rudder cable
• Rigging couplers (4) • Cable crimps (4)
• 2-56 nuts (3) • Rudder spring (2)
• Rudder tiller bracket • Radio tray cover
• Safety fuel tubing (4)
• Rado tray cover
• 2-56 x 5/8-inch machine screw (9)
• Hook and loop strap (2)
• #2 x 5/8-inch sheet metal screw (4)
1
• 33
/4-inch (845mm) elevator pushrod (2)
• 4-40 ball end w/hardware (4)
• Control horn w/backplate (4)
Required Tools and Adhesives
• Drill • Large servo arm (3)
• Threadlock • Hobby knife
• Felt-tipped pen • Thin CA
• Crimping tool/vice grips • Pliers
• 1/4-inch (6mm) foam
• Drill bit: 1/16-inch (1.5mm), 5/64-inch (2mm)
Step 2
Attach the ball end to a large servo horn. Use side cutters
to remove the remaining arm from the horn.
Step 3
Slide the pushrod into the elevator pushrod tube inside
the fuselage. You will need to trim the covering from the
pushrod exit using a hobby knife.
Step 1
Locate the 33
40 ball end. Thread the ball end onto one end of the rod a
minimum of 14 turns.
1
/4-inch (845mm) elevator pushrod and a 4-
Step 4
Slide a piece of safety fuel tubing onto a metal clevis.
Thread a 4-40 nut and metal clevis onto the pushrod.
20
Align holes with hinge line
Radio Installation
Step 5
Remove the backplate from a control horn. Attach the
clevis to the horn and position the horn on the elevator
with the holes in the horn aligned with the elevator
hinge line. The horn cenerline will be 1-inch (25mm)
from the edge of the stabilizer to avoid interferrence
between the control linkage and mounting tabs. Use a
felt-tipped pen to mark the positions for the three control
horn mounting screws.
Step 7
Apply a few drops of thin CA into each of the holes to
harden the surrounding wood.
Step 8
Attach the control horn to the elevator using three
2-56 x 5/8-inch machine screws and the control
horn backplate.
Step 6
Use a 5/64-inch (2mm) drill to drill through the elevator
for the control horn mounting screws.
Note: Once the length of the linkage
has been adjusted; use threadlock on
the nuts and clevises to prevent them
from vibrating loose in flight.
21
Radio Installation
Step 9
Install the elevator servo into the fuselage. The output arm
on the servo faces toward the rear of the fuselage. Secure
the servo horn to the servo using the hardware provided
with the servo.
Step 10
Note: The cable will be installed into the
fuselage from the tail to make the servo
end of the cable easier to install, and
to keep it from falling into the fuselage
while installing the ends and servo.
Step 11
Locate the rudder cable and insert one end of the cable
into the fuselage. Make sure the cable does not get
tangled around any of the formers on its way to where the
rudder servo will be installed.
Repeat Steps 1 through 9 to install the remaining
elevator servo.
Note: Using two standard rotation servos
and a standard Y-harness for the elevator
servos will result in them moving in opposite
directions instead of the same direction.
There are three options available that will
result in the elevators operating correctly.
Option 1: Use two standard rotation servos
if your radio has programmable mixing.
You will need to use two separate channels
and use your radio to mix them together
electronically for this option to work.
Option 2: Use two servos and a JR®
MatchBox™ or a 6" standard reversing
Y-harness (EXRA320) to link the two
elevator servos to operate properly.
Option 3: Use a standard rotation
servo and a reverse rotation servo
and a standard Y-harness.
22
Radio Installation
Step 12
Thread a rigging coupler into one of the 4-40 ball ends.
Slide a crimp onto the cable, then pass the cable through
the rigging coupler. The cable then goes back through
the crimp. Use a crimping tool or vice grips to secure the
crimp to the cable.
Step 15
Install the rudder servo into the fuselage and attach the
servo horn to the servo using the hardware provided
with the servo. The output of the servo faces the front of
the fuselage. Note that the cables cross once inside the
fuselage: The cable from the right side of the servo exits
the left of the fuselage and vice versa.
Step 13
Repeat Steps 11 and 12 to prepare the other end of
the cable.
Step 14
Attach the ball ends to the servo horn using the hardware
included with the ball ends.
Step 16
Place light tension on the cable and align it so it is
centered in the exit opening. The rudder control horn
centerline should be 7/8-inch (22mm) from the bottom of
the rudder. Mark the rudder where the cable crosses with a
felt-tipped pen.
23
Align holes with hinge line
Radio Installation
Step 17
The rudder uses two control horns mounted on either
side. Position one horn so it is aligned with the mark
made in the previous step. Mark and drill the holes for
the control horn screws, then mount the horns. The three
2-56 x 5/8-inch machine screws go through the first
control horn, through the rudder, through the second horn
and are then secured using three 2-56 nuts.
Step 18
Slide a piece of safety tubing on a metal clevis. Thread a
4-40 nut and metal clevis onto a rigging coupler. Slide
a crimp onto the cable, then slide the cable through the
coupler. The cable will then go back through the crimp.
Prepare both ends of the cable and attach the clevises to
the control horns. Adjust the cable so there is light tension
on the cable, then secure the cable using the crimp and
crimping pliers or vice grips. Make sure to install that
safety fuel tubing on those clevises.
Note: Use threadlock on the nuts to prevent
them from vibrating loose in flight.
Note: Once the length of the cable
has been adjusted, use threadlock on
the nuts and clevises to prevent them
from vibrating loose in flight.
Step 19
Attach the rudder tiller bracket to the rudder using two
#2 x 5/8-inch sheet metal screws. It is highly suggested to
remove the screws, then apply a few drops of thin CA into
the holes and reinstall the screws.
24
Radio Installation
Step 20
Connect the rudder tiller bracket to the tailwheel steering
arm using the two rudder springs. You will need to bend
the springs to attach them on each end using pliers.
Step 21
Wrap the receiver battery and receiver in 1/4-inch (6mm)
foam. Attach the receiver and receiver battery to the radio
tray using hook and loop straps.
Step 23
Install a choke ring (JRPA029) on each of the the
18-inch (457mm) aileron extensions that are plugged
into the receiver. These will be hidden under the radio
tray. This is strongly recommended due to all the metal
struts on the Cub.
Step 24
Step 22
Slide the radio tray into the fuselage and secure its
position using two #2 x 1/2-inch sheet metal screws.
Plug two 18-inch (457mm) servo extensions into
the receiver and route them through the holes in the
sides of the fuselage and up to the top of the fuselage.
Slide the radio tray cover into position so it locks into
position under the rear cabin wall. Use two #2 x 1/2-inch
sheet metal screws to secure the radio tray cover inside
the fuselage.
Remove the template and enlarge the holes using a
3/16-inch (4.5mm) drill bit.
Step 3
Secure the engine mounts to the firewall using four
8-32 blind nuts from the inside of the fuselage, and four
8-32 x 1
1
/4-inch socket head screws and four #8 washers.
Step 1
Place the firewall template in position on the firewall. Drill
the locations for your particular engine using a 1/16-inch
(1.5mm) drill bit. Drill the location for the throttle pushrod
at this time as well.
26
Engine Installation (Glow)
Step 4
Position the engine on the mount so the drive washer is 6
inches (152mm) forward of the firewall. Clamp the engine
to the mount and transfer the locations for the engine
mounting bolts onto the engine mounts.
Step 5
Drill the locations for the engine mounting screws using a
drill and 5/32-inch (4mm) drill bit.
Step 6
Slide the throttle pushrod tube into the hole drilled in
the firewall. The tube will extend forward of the firewall
slightly. Use medium CA to glue the tube to the firewall.
Note: It may be necessary to rotate
the carburetor to align with the throttle
pushrod tube. Check the alignment before
attaching the engine to the engine mount.
Step 7
Use four 8-32 x 1
8-32 locknuts and eight #8 washers to secure the engine
to the mount.
1
/2-inch socket head screws, four
27
Engine Installation (Glow)
Step 8
Thread a 1-inch (25mm) threaded rod into each end of
the throttle pushrod. Thread a metal clevis onto one of
the threaded rods and slide the pushrod into the pushrod
tube. Attach the clevis to the arm of the carburetor.
Step 9
Secure the throttle servo in the fuselage using the
hardware provided with the servo. Thread a clevis onto the
threaded rod and attach the clevis to the servo arm.
Step 11
Slide the fuel tank into the fuselage with the stopper facing
toward the top of the fuselage. Use a rubber band to keep
the fuel tank from moving rearward in the fuselage.
Step 12
Use two #2 x 1/2-inch sheet metal screws to secure the
battery cover in position behind the fuel tank.
Step 10
Check the operation of the throttle servo to make sure
it doesn't bind and the throttle will move from open to
closed. Make any adjustment at this time to the throttle
linkage as necessary.
28
Engine Installation (Glow)
Step 13
Install the muffler and connect the fuel lines from the tank
to the engine.
Note: We used a fuel dot and T-fitting
on our model so the cowl won't have
to be removed to fuel the engine.
Step 14
Attach the cowling using four 4-40 x 1/2-inch
socket head screws, four pieces of cowl screw tubing
and four #4 washers. Install the propeller to complete
the engine installation.
Note: You will need to use a Muffler
Right Angle Adapter (SAI120S140)
when installing the Saito engines.
29
Engine Installation (Gas)
Required Parts
• Fuselage assembly • Firewall template
• Throttle pushrod tube • Metal clevis (2)
• Battery cover • #4 washer (4)
• Cowl screw tubing (4) • Throttle pushrod
• Fender washer (4)
• Ignition switch (JRPA004)
• 10-32 x 5/8-inch bolt (4)
• 4-40 x 1/2-inch socket head screw (4)
• #2 x 1/2-inch sheet metal screw (2)
• Threaded rod, 1-inch (25mm) (2)
• 38mm engine stand-offs (EVO3307)
Required Tools and Adhesives
• Drill
• Clamp • Medium CA
• Phillips screwdriver • Threadlock
• Hex wrench: 3/32-inch, 9/64-inch
• Drill bit: 1/16-inch (1.5mm), 3/16-inch (4.5mm)
Step 1
Place the firewall template in position on the firewall. Drill
the locations for your particular engine using a 1/16-inch
(1.5mm) drill bit. Drill the location for the throttle pushrod
at this time as well.
Step 2
Remove the template and enlarge the holes using a
3/16-inch (4.5mm) drill bit.
Step 3
Slide the throttle pushrod tube into the hole drilled in
the firewall. The tube will extend forward of the firewall
slightly. Use medium CA to glue the tube to the firewall.
Step 4
Attach the engine and accessories to the firewall as shown
in the following photos.
30
Step 7
Engine Installation (Gas)
Step 5
Secure the throttle servo in the fuselage using the
hardware provided with the servo. Thread a clevis onto the
threaded rod and attach the clevis to the servo arm.
Slide gas compatible fuel lines back onto the brass
tubes. Use fine wire to secure the fuel lines. The wire
is placed behind the solder applied in the previous step
to keep the tubes in place.
Step 8
Carefully insert the stopper assembly into the fuel tank.
Note the position of the vent tube; it must be up at the top
portion of the fuel tank to function properly. Tighten the
screw carefully—do not over-tighten.
Note: When using a gas engine it is
recomended that an RF choke ring (JRPA029)
be used. The servo lead must make 3
passes around or through the ring.
Step 6
Remove the stopper from the fuel tank using a Phillips
screwdriver. Remove the fuel lines from the stopper and
set them aside. Prepare the tubing by placing a drop of
solder on the ends of the brass tubing as shown. This
will keep the fuel line from slipping off the tube when
combined with the following steps.
31
Engine Installation (Gas)
Step 9
Slide the fuel tank into the fuselage with the stopper facing
toward the top of the fuselage. Use a rubber band to keep
the fuel tank from moving rearward in the fuselage.
Step 10
Use two #2 x 1/2-inch sheet metal screws to secure the
battery cover in position behind the fuel tank.
Step 11
Trim the cowling as necessary to clear the muffler,
carburetor and head of the engine. Secure the cowling
using four 4-40 x 1/2-inch socket head screws, four
pieces of cowl screw tubing and four #4 washers.
The ignition battery should be placed
next to the fuel tank behind the firewall.
This is to keep as much separtation
between the ignition and the RX.
The battery pack should be installed
before installing the fuel tank. The model
was flown with the battery pack placed
here when using the Zenoh 20ei.
32
Interior Detail Installation
Required Parts
• Fuselage assembly • Front windscreen
• Side window (left and right) • Upper window
• Front seat bottom • Front seat back
• Rear seat bottom • Rear seat back
• Floor • Instrument panel
• Windscreen supports • Hook and loop
• Pilot
• #2 x 1/2-inch sheet metal screw (4)
Required Tools and Adhesives
• Switch harness • Medium CA
• Phillips screwdriver • Hobby knife
• Hobby scissors • 30-minute epoxy
• Canopy glue
Step 1
Install the switch harness into the opening in the rear
seat bottom.
Step 3
Plug the switch harness into the battery and receiver. Slide
the rear seat into position, guiding the wires from the
switch harness behind the seat.
Step 4
Glue the front seat back to the front seat bottom. Slide the
front seat into position.
Step 2
Use medium CA to glue the rear seat back to the rear
seat bottom.
33
Interior Detail Installation
Step 5
Use four #2 x 1/2-inch sheet metal screws to secure the
floor into the fuselage. The floor will keep the seats from
sliding in the fuselage.
Step 6
Use medium CA to glue the instrument panel into
the fuselage
Step 7
Use 30-minute epoxy to glue the windscreen supports into
position as shown.
Step 8
Use canopy glue to glue the front windscreen onto the
fuselage as shown.
34
Interior Detail Installation
Step 9
Use a hobby knife and hobby scissors to trim the side
windows. Use canopy glue to attach the side windows
into position.
Step 10
Trim the rear window and use canopy glue to secure the
rear window in position.
Step 12
Complete the window installation by trimming and
installing the upper window in the fuselage.
Step 13
Use hook and loop to secure the pilot in the fuselage.
Step 11
Repeat Steps 9 and 10 for the opposite side windows.
35
Wing Installation
Required Parts
• Wing (left and right) • Short strut pin (4)
• Mid-span stud (4) • 4mm nut (4)
• Wing strut end (4) • Long strut pin (4)
• Retainer clip (8) • Aluminum wing tube
• Wing strut wing bracket • 4-40 locknut (8)
• 1/4-20 nylon wing bolt (2)
• Mid-span cross brace (2)
• 4-40 x 3/4-inch socket head screw (8)
• 4-40 x 3/8-inch socket head screw (4)
• 4-40 x 1/2-inch socket head screw (4)
• Front wing strut (left and right)
• Rear wing strut (left and right)
Required Tools and Adhesives
• Hex wrench: 3/32-inch • Threadlock
• Nut driver: 1/4-inch
Step 1
Attach the wing strut wing brackets to the bottom of the
wing using four 4-40 x 3/4-inch socket head screws.
Step 2
Thread two of the mid-span studs into the wing. The
threads of the studs should be flush to the top of the wing
Step 3
Attach the front and rear wing strut to the brackets
using four 4-40 x 1/2-inch socket head screws and
4-40 locknuts.
Note: Use threadlock on the screws to
prevent them from vibrating loose in flight.
36
Note: The wide strut goes toward the leading
edge, the narrow strut toward the trailing
edge. The airfoil on the struts will match
the wing as well when they are installed.
Wing Installation
Step 4
Thread the wing strut ends and 4mm nuts on the ends
of the struts.
Step 5
Install the mid-span supports and cross brace as shown.
The brace and supports attach using two 4-40 x 3/8-inch
socket head screws and 4-40 locknuts. The supports
attach to the mid-span studs using two long strut pins and
two retainer clips.
Step 6
Slide the aluminum wing tube into the fuselage. The wing
is then slid onto the wing tube. Plug the servo lead in the
wing into the extension inside the fuselage.
Step 7
The wing is held in place using a 1/4-20 nylon wing bolt.
37
Wing Installation
Step 8
Confirm that there is a piece of tubing on the pin before
inserting it into the brace. If not, install a piece of tubing
to prevent vibration and radio interferrence. Slide the
short pins from the strut ends into the brace at the
fuselage. It will be necessary to adjust the strut ends
to align without binding or twisting the wing. Once
adjusted, tighten the 4mm nuts against the ends to
prevent them from changing position.
Step 9
Secure the strut ends to the wing using two retainer
pin clips.
Note: Use threadlock on the strut
ends and 4mm nuts to prevent them
from vibrating loose in flight.
38
Control Throws
The amount of control throw should be adjusted as closely
as possible using mechanical means, rather than making
large changes electronically at the radio. By moving
the position of the clevis at the control horn toward the
outermost hole, you will decrease the amount of control
throw of the control surface: moving it toward the control
surface will increase the amount of throw; moving the
pushrod wire at the servo arm will have the opposite
effect. Moving it closer to center will decrease throw,
and away from center will increase throw. Work with a
combination of the two to achieve the closest or exact
control throws listed.
Aileron:
High Rate: 1
1
1
/8-inch (28mm) up
1
/8-inch (28mm) down
Low Rate: 3/4-inch (19mm) up
3/4-inch (19mm) down
Note: Aileron throw is measured at the trailing
edge of the aileron nearest the fuselage.
Elevator:
High Rate: 2-inch (51mm) up/down
Low Rate: 1
1
/4-inch (32mm) up/down
Note: Elevator throw is measured
at the trailing edge of the elevator
next to the fuselage.
Rudder:
High Rate: 2
Low Rate: 1
1
/4-inch (57mm) left/right
1
/2-inch (38mm) left/right
Note: Rudder throw is measured
at the bottom of the rudder.
Recommended Center of Gravity (CG)
An important part of preparing the aircraft for flight is
properly balancing the model. This is especially important
when various engines are mounted.
Caution: Do not inadvertently skip this step!
The recommended Center of Gravity (CG) location for
the Piper J-3 Cub is CG: 4
1
/2 inches (114mm) back
from leading edge of wing at the root rib. Mark the
location of the CG onto the bottom of the wing using
a felt-tipped pen. Make sure the aircraft is upright when
checking the CG. If the nose of your aircraft hangs low,
add weight to the rear of the aircraft. If the tail hangs low,
add weight to the nose of the aircraft. Stick-on weights
are available at your local hobby store and work well for
this purpose. The CG Range for your Piper J-3 Cub is
4–43/4 inches (102mm–120mm) back from leading
edge of wing at the root rib.
39
Pre-Flight
Charge both the transmitter and receiver pack for your airplane. Use the recommended charger supplied with your
particular radio system, following the instructions provided with the radio. In most cases, the radio should be charged the
night before going out flying.
Check the radio installation and make sure all the control surfaces are moving correctly (i.e. the correct direction and with
the recommended throws). Test run the engine and make sure it transitions smoothly from idle to full throttle and back.
Also ensure the engine is tuned according to the manufacturer’s instructions, and it will run consistently and constantly at
full throttle when adjusted.
Check all the control horns, servo horns and clevises to make sure they are secure and in good condition. Replace any
items that would be considered questionable. Failure of any of these components in flight would mean the loss of your
aircraft.
Adjusting the Engine
Step 1
Completely read the instructions included with your engine and follow the recommended break-in procedure.
Step 2
At the field, adjust the engine to a slightly rich setting at full throttle and adjust the idle and low-speed needle so that a
consistent idle is achieved.
Step 3
Before you fly, be sure that your engine idles reliably, transitions and runs at all throttle settings. Only when this is
achieved should any plane be considered ready for flight.
Range Test Your Radio
Before each flying session, be sure to range check your radio. See your radio manual for the recommended range and
instructions for your radio system. Each radio manufacturer specifies different procedures for their radio systems. If using
a gasoline engine, check the range first with the engine not running and note the distance. Next, start the engine. With the
model securely anchored, check the range again. The range test should not be significantly affected. If it is, don’t attempt
to fly! Have your radio equipment checked out by the manufacturer.
Instructions for Disposal of WEEE by
Users in the European Union
This product must not be disposed of with other waste. Instead, it is the user’s responsibility to dispose of their waste
equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic
equipment. The separate collection and recycling of your waste equipment at the time of disposal will help to conserve
natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more
information about where you can drop off your waste equipment for recycling, please contact your local city office, your
household waste disposal service or where you purchased the product.
40
Building and Flying Notes
41
2007 Official AMA
National Model Aircraft Safety Code
GENERAL
1. A model aircraft shall be defined as a non-humancarrying device capable of sustained flight in the
atmosphere. It shall not exceed limitations established
in this code and is intended to be used exclusively for
recreational or competition activity.
2. The maximum takeoff weight of a model aircraft,
including fuel, is 55 pounds, except for those flown
under the AMA Experimental Aircraft Rules.
3. I will abide by this Safety Code and all rules
established for the flying site I use. I will not willfully
fly my model aircraft in a reckless and/or dangerous
manner.
4. I will not fly my model aircraft in sanctioned events,
air shows, or model demonstrations until it has been
proven airworthy.
5. I will not fly my model aircraft higher than
approximately 400 feet above ground level, when
within three (3) miles of an airport without notifying the
airport operator. I will yield the right-of-way and avoid
flying in the proximity of full-scale aircraft, utilizing a
spotter when appropriate.
6. I will not fly my model aircraft unless it is identified
with my name and address, or AMA number, inside or
affixed to the outside of the model aircraft. This does
not apply to model aircraft flown indoors.
7. I will not operate model aircraft with metal-blade
propellers or with gaseous boosts (other than air),
nor will I operate model aircraft with fuels containing
tetranitromethane or hydrazine.
8. I will not operate model aircraft carrying pyrotechnic
devices which explode burn, or propel a projectile
of any kind. Exceptions include Free Flight fuses or
devices that burn producing smoke and are securely
attached to the model aircraft during flight. Rocket
motors up to a G-series size may be used, provided
they remain firmly attached to the model aircraft during
flight. Model rockets may be flown in accordance with
the National Model Rocketry Safety Code; however,
they may not be launched from model aircraft. Officially
designated AMAAir Show Teams (AST) are authorized
to use devices and practices as defined within the Air
Show Advisory Committee Document.
9. I will not operate my model aircraft while under the
influence of alcohol or within eight (8) hours of having
consumed alcohol.
10. I will not operate my model aircraft while using any
drug which could adversely affect my ability to safely
control my model aircraft.
11. Children under six (6) years old are only allowed on
a flightline or in a flight area as a pilot or while under
flight instruction.
12. When and where required by rule, helmets must be
properly worn and fastened. They must be OSHA, DOT,
ANSI, SNELL or NOCSAE approved or comply with
comparable standards.
42
2007 Official AMA
National Model Aircraft Safety Code
Radio Control
1. All model flying shall be conducted in a manner to
avoid over flight of unprotected people.
2. I will have completed a successful radio equipment
ground-range check before the first flight of a new or
repaired model aircraft.
3. I will not fly my model aircraft in the presence of
spectators until I become a proficient flier, unless I am
assisted by an experienced pilot.
4. At all flying sites a line must be established, in front of
which all flying takes place. Only personnel associated
with flying the model aircraft are allowed at or in front
of the line. In the case of airshows demonstrations
straight line must be established. An area away from
the line must be maintained for spectators. Intentional
flying behind the line is prohibited.
5. I will operate my model aircraft using only radiocontrol frequencies currently allowed by the Federal
Communications Commission (FCC). Only individuals
properly licensed by the FCC are authorized to operate
equipment on Amateur Band frequencies.
6. I will not knowingly operate my model aircraft within
three (3) miles of any preexisting flying site without
a frequency-management agreement. A frequencymanagement agreement may be an allocation of
frequencies for each site, a day-use agreement between
sites, or testing which determines that no interference
exists. A frequency-management agreement may exist
between two or more AMA chartered clubs, AMA
clubs and individual AMA members, or individual
AMA members. Frequency-management agreements,
including an interference test report if the agreement
indicates no interference exists, will be signed by all
parties and copies provided to AMA Headquarters.
7. With the exception of events flown under official AMA
rules, no powered model may be flown outdoors closer
than 25 feet to any individual, except for the pilot and
located at the flight line.
8. Under no circumstances may a pilot or other person
touch a model aircraft in flight while it is still under
power, except to divert it from striking an individual.
9. Radio-controlled night flying is limited to lowperformance model aircraft (less than 100 mph).
The model aircraft must be equipped with a lighting
system which clearly defines the aircraft's attitude and
direction at all times.
10. The operator of a radio-controlled model aircraft shall
control it during the entire flight, maintaining visual
contact without enhancement other than by corrective
lenses that are prescribed for the pilot. No model
aircraft shall be equipped with devices which allow it
to be flown to a selected location which is beyond the
visual range of the pilot.