Hangar 9 Alpha.60 ARF, arrow .40 ARF Assembly Manual

Alpha .60 ARF

WE GE T P EOP LE FLY ING

TM

®

ASSEMBLY MANUAL

Specifications

Wingspan: ............. 71.5 in (1816mm)

Length: ................... 54 in (1371mm)

Wing Area: ............ 965.2 sq in (66.27 sq dm)

Weight: .................. 7.0–8.0 lb (3.2 kg–3.6 kg)

Engine: .................... .61 2-stroke

Radio: ..................... 4-channel w/4 servos

Table of Contents

Covering Colors .......................................................................................................................................................... 2

Contents of Kit ............................................................................................................................................................ 3

Required Radio and Engine ......................................................................................................................................... 3

Field Equipment Required ........................................................................................................................................... 4

Optional Field Equipment ............................................................................................................................................ 4

Additional Required Tools and Adhesives ................................................................................................................... 4

Warning ...................................................................................................................................................................... 4

Before Starting Assembly ............................................................................................................................................ 5

Using the Manual ........................................................................................................................................................ 5

Warranty Information ................................................................................................................................................... 5

Section 1: Joining the Wing Halves ............................................................................................................................ 6

Section 2: Gluing the Panels Together (Optional) ........................................................................................................ 7

Section 3: Fuel Tank Assembly .................................................................................................................................... 8

Section 4: Fuel Tank Installation ................................................................................................................................ 10

Section 5: Radio Installation ..................................................................................................................................... 11

Section 6: Tail Installation ......................................................................................................................................... 15

Section 7: Tail Installation (Glue Attachment Option) ................................................................................................ 17

Section 8: Landing Gear Installation ......................................................................................................................... 21

Section 9: Engine Installation .................................................................................................................................... 24

Section 10: Control Linkage Installation ................................................................................................................... 26

Section 11: Wing Installation (Rubber Band Option) ................................................................................................. 35

Section 11: Wing Installation (Bolt-On Option) ......................................................................................................... 36

Section 12: Control Throws ...................................................................................................................................... 37

Section 13: Center of Gravity .................................................................................................................................... 39

Section 14: Range Testing the Radio ......................................................................................................................... 40

Section 15: Adjusting the Engine .............................................................................................................................. 40

Section 16: Preflight ................................................................................................................................................. 40

Glossary of Terms ..................................................................................................................................................... 41

2004 Official AMANational Model Aircraft Safety Code ............................................................................................. 42

Covering Colors

• True Red HANU866

• Deep Blue HANU873

2

• White HANU870

• Silver HANU881

Contents of Kit

B

C

Large Parts:

A. Wing Set w/Alum. Tube HAN2601
B. Fuselage HAN2602
C. Tail Set HAN2603
D. Landing Gear Set HAN2604
E. Wing Tube HAN2605

3

F. 2

/4" Wheels HAN305

G. 3" Wheels HAN306

F

G

D

A

E

Items Not Shown:

Engine Mount HAM90M
Pushrod Set HAN2607
Fuel Tank (assembled) HAN2606

Note: Wheels are shown installed.

Required Radio and Engine

Radio Equipment

• 4-channel radio system (minimum)

• 4 standard servos (JRPS537 recommended
or equivalent)

• 6" Servo Extension (JRPA095)

Recommended JR® Systems

• Quattro

• XF421EX

• XF631

• XP662

• X-378

• XP6102

JR XF631

JR XF421EX

Recommended Engine

• .61 2-stroke

Evolution .61NT

EVOE0610

3

Field Equipment Required

• Propeller (EVOE0610P recommended)

• Fuel (10%–15% nitro content)

• Glow Plug Wrench (HAN2510)

• Glow Plug Igniter with Charger (HAN7101)

Optional Field Equipment

• 4-Way Wrench (DUB701)

• Fieldmate (HAN117)

• Cleaner & towels

• Extra Glow Plugs (HAN3001/3006)

• Blue Block After Run Oil (EVOX1000)

• Glow Plug (HAN3001/3006)

• Manual Fuel Pump (HAN118)

• #64 Rubber Bands (ARC64)

• Start-Up Field Pack (HANSTART)

• Power Panel (HAN106)

• 12V 7Ah Sealed Battery (HAN102)

• PowerPro 12V Starter (HAN161)

Additional Required Tools and Adhesives

Tools

• Adjustable wrench

• Drill

• Drill bit: 5/64", 3/32”

• Hobby Knife (XAC3126)

• Phillips screwdriver (small)

Adhesives

• 30-Minute Epoxy (HAN8002)

• Thick CA (cyanoacrylate) Glue (PAAPT02)

• CA Remover/Debonder (PAAPT16)

• Masking Tape (MMM20901)

Other Required Items

1

/2" spinner (white) (EVOE0610S recommended)

• 2

• Epoxy Brushes (DUB345)

• Felt-Tipped Pen (PAR10400)

• File

• Measuring device (e.g. ruler, tape measure)

• Mixing Sticks for Epoxy (DUB346)

• Paper towels

• Rubbing alcohol

• Wax paper

Warning

An RC aircraft is not a toy! If misused, it can cause serious bodily harm and damage to property. Fly only in open
areas, preferably at AMA (Academy of Model Aeronautics) approved flying sites, following all instructions included
with your radio and engine.

4

Before Starting Assembly

Before beginning the assembly of the Alpha™, 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 covering iron to remove them. Use caution while
working around areas where the colors overlap to prevent separating the colors.

Using the Manual

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 multiple boxes indicate the step will require repeating, such as for a right or left wing
panel, two servos, etc. Remember to take your time and follow the directions.

Warranty Information

Horizon Hobby, Inc. guarantees this kit to be free from defects in both material and workmanship at the date of
purchase. This warranty does not cover any parts damage by use or modification. In no case shall Horizon Hobby's
liability exceed the original cost of the purchased kit. Further, Horizon Hobby reserves the right to change or modify
this warranty without notice.

In that Horizon Hobby has no control over the final assembly or material used for the final assembly, no liability
shall be assumed nor accepted for any damage of the final user-assembled product. By the act of using the product,
the user accepts all resulting liability.

Once assembly of the model has been started, you must contact Horizon Hobby, Inc. directly regarding any warranty
question that you have. Please do not contact your local hobby shop regarding warranty issues, even if that is where
you purchased it. This will enable Horizon to better answer your questions and service you in the event that you may
need any assistance.

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.

Horizon Hobby

4105 Fieldstone Road

Champaign, Illinois 61822

[phone]

www.horizonhobby.com

5

Section 1: Joining the Wing Halves

Required Parts

• Right wing panels • Left wing panel

• Wing joiner tube

Required Tools and Adhesives

• Hobby knife

Skip to Section 2 if you plan on joining
the wings together permanently.

Step 1

Locate the wing joiner tube. Slide the tube into one
of the wing panels.

Step 3

Apply the clear tape to the joint, starting at the front
of the servo tray. Wrap the tape around the leading
edge, then onto the top of the wing. Continue around
the trailing edge of the wing, back to the servo tray.
Trim the excess tape using a hobby knife.

Step 2

Slide the remaining wing panel onto the tube tightly
against the first panel.

6

Section 2: Gluing the Panels Together (Optional)

Required Parts

• Right wing panels • Left wing panel

• Wing joiner tube

Required Tools and Adhesives

• Masking tape • 30-minute epoxy

• Epoxy brush • Mixing stick

• Rubbing alcohol • Paper towels

• Hobby knife

The two wing panels can be glued together if
you choose to do so. Read through the steps
and wait to mix the epoxy until the steps are
fully understood.

Step 1

Locate the wing joiner tube. Slide the tube into one
of the wing panels.

Step 2

Mix 1/2 ounce of 30-minute epoxy. Apply the
epoxy to the exposed wood at the root rib.

Step 3

Slide the remaining wing panel onto the tube tightly
against the first panel. Use masking tape on the top
and bottom of the wing to hold the panels tightly
together until the epoxy cures.

Hint: Use a paper towel moistened with
rubbing alcohol to clean up any epoxy before
it has a chance to cure.

7

Section 3: Fuel Tank Assembly

Required Parts

• Clunk (fuel pickup) • Metal caps (2)

• Fuel pickup tubing • Fuel tank

• Rubber stopper • 3mm x 20mm screw

• Metal tubes (short and long)

Required Tools and Adhesives

• Phillips screwdriver (small) • Hobby knife

The stopper provided with your model has
three holes that are not bored completely
through the stopper. The holes are for the
fuel pickup, fill, and vent lines. For these
instructions only, two holes will be used:
one for the fuel pickup and one for the fuel
vent. Only open the third hole if you are
going to use a separate fill line.

Step 1

Locate the fuel tank parts.

Step 2

Locate the rubber stopper. Insert the short metal
tube into one of the holes in the stopper so that an
equal amount of tube extends from each side of the
stopper. This tube will be the fuel tank pickup that
provides fuel to the engine.

Step 3

Slide the smaller cap over the tube on the smaller
end of the rubber stopper. This end will be inserted
into the fuel tank. The larger cap is placed on the
side of the rubber stopper that makes the cap.
Loosely install the 3mm x 20mm screw through
the center of the stopper.

8

Section 3: Fuel Tank Assembly

Step 4

Locate the vent tube. It is the one that has a slight
bend. Slide the longer end of the vent tube into the
remaining hole in the stopper from the tank (small
cap) side. The bend must be on the back of the
stopper, so it ends up inside the fuel tank.

Step 5

Locate the clear piece of silicone fuel tubing and
the fuel tank clunk. Install the clunk onto one end
of the silicone tubing. Slide the silicone tubing (end
opposite the clunk) onto the fuel tank pickup tube
(straight tube) in the stopper.

Step 6

Carefully insert the stopper assembly into the fuel
tank. Note the position of the vent tube; it must point
towards the top of the fuel tank to function properly.
(The stopper is located towards the top of the tank.)

Check to make sure the clunk can move
freely inside the tank. You must be able
to turn the tank to any attitude, and the
clunk will fall to the lowest point (all
directions except for having the stopper
facing down). If it does not, remove the
stopper and shorten the line by 1/16 inch
and check again. Take your time during
this step, as it is important that the clunk
operates properly. Having the line too short
will keep the engine from drawing all the
fuel from the tank.

9

Section 3: Fuel Tank Assembly

Step 7

Tighten the 3mm x 20mm screw carefully—do not
overtighten, as this can cause the the fuel tank to
split open. This allows the rubber stopper to form
a seal by being slightly compressed, thus sealing
the fuel tank opening.

Step 8

Install the vent and pickup tubes. Use the red tube
on the vent, and the green tube on the pickup. This
will be helpful later when installing the lines to
the engine.

Section 4: Fuel Tank Installation

Required Parts

• Fuselage • Fuel tank assembly

Required Tools and Adhesives

• None

Step 1

Slide the fuel tank into the fuselage. Make sure the
stopper faces the top of the fuselage.

Step 2

Guide the fuel lines through the large hole in the
firewall. Push the fuel tank as far forward as possible.

10

Section 5: Radio Installation

Required Parts

• Fuselage • Foam radio protector

• Radio tray (plywood)

• #6 x 5/8" sheet metal screw

Required Tools and Adhesives

• Standard servo (4) • Servo hardware

• Receiver • Radio battery pack

• Switch harness • 6" servo extension

• Phillips screwdriver (small) • Drill bit: 5/64"

• Drill

Step 1

Install the rubber grommets and eyelets supplied with
your servos. Use the instructions provided with the
radio system for this procedure.

Step 2

Test fit a servo into one of the openings in the
fuselage. Use a small sander to make the opening
bigger if the servo does not fit. Check and fit
all three servos.

11

Section 5: Radio Installation

Step 3

Position the three servos as shown. Use the screws
provided with the servos to secure them in position.

Step 4

1

Cut one of the flat foam pieces to a length of 5

/2".

Place the foam piece inside the fuselage as shown.

Step 5

Plug the servos, receiver and aileron extension into
the receiver. Use the radio instructions to make sure
the servos are plugged into the correct channels. Use
the photo in Step 3 that labels the elevator, rudder
and throttle servos.

Step 6

Cut pieces of the remaining foam to fit at the front
and rear of the radio area. Place the receiver and
receiver battery onto the foam as shown. Position
the servo wires so they are neat and not cluttering
the area around the receiver and receiver battery.
Use the remaining foam to insulate the receiver and
receiver battery from the sides of the fuselage and
from each other.

12

Step 7

Section 5: Radio Installation

Route the receiver antenna wire through the antenna
tube located on the right side of the fuselage. This
routes the antenna to the rear of the fuselage.

Step 8

Check to make sure the aileron servo lead and
receiver antenna wire are accessible. Place the
remaining flat radio foam piece over the receiver
battery and receiver.

DO NOT cut the antenna wire, as this will
significantly reduce the range and operation
of your radio system.

To make the installation of the receiver
antenna easier, use a small piece of music
wire. Slide the wire into the antenna tube
from the back of the fuselage. Attach the
receiver antenna to the wire and pull it
through the tube.

Step 9

Slide the plywood radio tray into the notches in the
former. Push the tray forward, against the fuel tank.

13

Section 5: Radio Installation

Step 10

Drill a 5/64" hole in the tray support using the hole in
the aft end of the tray as a guide.

Step 11

Secure the tray using a #6 x 5/8" sheet metal screw.

Step 13

Remove the switch plate from the radio switch.
Attach the switch to the fuselage side using the
switch hardware.

14

Section 6: Tail Installation

Required Parts

• Fuselage • Rudder/fin

• Stabilizer/elevator

Required Tools and Adhesives

• Wing nut (2) • #4 washer (4)

• 4-40 x 3/4" screw (2) • Threadlock (included)

• Phillips screwdriver

Skip to Section 7 if you plan on joining
the tail to the fuselage permanently.

Step 1

Slide the fin bolts into the holes in the stabilizer.
Make sure the trim is facing towards the fin.
Push the fin tight against the stabilizer.

Step 3

Slide a 3mm washer onto the fin bolts. Thread
the wing nuts onto the bolts. Tighten the nuts
against the stabilizer. Do not crush the wood
when tightening the nuts.

Step 4

Step 2

Apply a small drop of threadlock onto each of
the fin bolts.

Place the stabilizer in position on the fuselage.
The fin will fit into the slot in the fuselage when
installed correctly.

15

Section 6: Tail Installation

Step 5

Slide a #4 washer onto a 4-40 x 3/4" screw. Apply a
drop of threadlock to the screw. Prepare two screws
using this method.

Step 6

Secure the stabilizer using the two screws prepared
in the previous step.

16

Section 7: Tail Installation (Glue Attachment Option)

Required Parts

• Fuselage • Rudder/fin

• Stabilizer/elevator

Required Tools and Adhesives

• Wing nut (2) • 30-minute epoxy

• 4-40 x 3/4" screw (2) • #4 washer (4)

• Phillips screwdriver • Felt-tipped pen

• Threadlock

The tail can be glued together, then glued
to the fuselage if you choose to do so. Read
through the steps and wait to mix the epoxy
until the steps are fully understood.

Step 1

Slide the fin bolts into the holes in the stabilizer.
Make sure the trim is facing towards the fin. Push the
fin tight against the stabilizer.

Step 2

Use a felt-tipped pen to trace the outline of the fit
onto the stabilizer.

Step 3

Use a hobby knife with a new blade to remove the
covering inside the lines drawn in the last step. Also
remove the covering from the bottom of the fin where
it rests against the stabilizer.

DO NOT cut into the underlying wood. Let
the knife “float” across the covering. Cutting
into the wood will weaken the stabilizer and
may cause it to fail in flight.

You can use a soldering iron instead of a
hobby knife to remove the covering. Doing
so will eliminate accidentally cutting into
the stabilizer.

17

Section 7: Tail Installation (Glue Attachment Option)

Note: Read through and understand Steps 4
through 7 before mixing any epoxy.

Step 4

Mix a small amount of 30-minute epoxy and apply
it to the exposed wood on the stabilizer.

Step 5

Re-install the fin onto the stabilizer.

Step 6

Step 7

Slide a 3mm washer onto the fin bolts. Thread
the wing nuts onto the bolts. Tighten the nuts
against the stabilizer. Do not crush the wood when
tightening the nuts.

Step 8

Place the stabilizer in position on the fuselage.
The fin will fit into the slot in the fuselage when
installed correctly.

Apply a small drop of threadlock onto each of
the fin bolts.

18

Section 7: Tail Installation (Glue Attachment Option)

Step 9

Trace the outline of the fuselage onto the bottom of
the stabilizer using a felt-tipped pen.

Step 10

Remove the covering from the bottom of the stabilizer
using a hobby knife or soldering iron.

Note: Read through and understand Steps 11
through 14 before mixing any epoxy.

Step 11

Mix 1/2 ounce of 30-minute epoxy. Apply the epoxy
to the exposed wood on the bottom of the stabilizer.

Step 12

Note: Remove the covering from the rear of

the stabilizer up to the bolt as shown.

Place the stabilizer/fin assembly back onto the
fuselage. Slide a #4 washer onto a 4-40 x 3/4" screw.
Apply a drop of threadlock to the screw. Prepare two
screws using this method.

19

Section 7: Tail Installation (Glue Attachment Option)

Step 13

Secure the stabilizer using the two screws prepared in
the previous step.

Step 14

Remove any excess epoxy from the fuselage
and stabilizer using a paper towel soaked with
rubbing alcohol.

20

Section 8: Landing Gear Installation

Required Parts

• Main landing gear • Nose gear wire

• Steering arm • Main axle (2)

• 3mm x 5mm screw (4) • 5/32" wheel collar (4)

3

• 3mm x 10mm screw • 3/32" x 17

3

/4" wheel • 3" wheel (1)

• 2

/4" wire

• 4mm x 18mm screw (2)

Required Tools and Adhesives

• Phillips screwdriver • Threadlock

Step 1

Use a file to make a flat area on both main gear and
nose gear. This gives the screws an area for the wheel
collars to tighten down onto. It will also keep them
from rotating and falling off the landing gear.

Step 2

3

Install the 3/32" x 17

/4" wire into the outer hole in
the steering arm. The Z-bend will be installed from
the top of the arm as shown in the photo. The hole in
the steering arm will face away from the wire.

21

Section 8: Landing Gear Installation

Step 3

Slide the wire into the steering pushrod tube.
Position the steering arm in the nose gear mount.

Step 5

Apply a drop of threadlock on the 3mm x 8mm screw.
Install the screw into the hole in the front of the
steering arm. Tighten the screw onto the flat on the
nose gear wire.

Step 6

Position the main landing gear on the fuselage.
The straight edge of the main landing gear faces
towards the front of the fuselage. Secure the main
gear using two 4mm x 18mm screws. Remember to
use threadlock to prevent the screws from loosening
during flight,

Step 4

Slide the nose gear wire into the nose gear mount
and steering arm. Note that there is a flat area on the
nose gear. This faces the front of the plane.

22

Section 8: Landing Gear Installation

Step 8

Attach the main axles to the main landing gear using
the nuts provided with the axles.

Step 9

Install a 3" wheel onto the main landing gear. Secure
the wheel using a 3mm x 5mm screw and a 5/32"
wheel collar. Check to make sure the wheel can spin
freely on the axle.

Step 10

Repeat Step 9 for the remaining 3" main wheel and

3

/4" nose wheel. The nose wheel will require

the 2
wheel collars on both sides of the wheel as shown.

23

Section 9: Engine Installation

Required Parts

1

• 8-32 x 1

/2” bolt (4) • 8-32 x 1” bolt (4)

• 8-32 locknut (4) • #8 washer (8)

• Engine mount

Required Tools and Adhesives

• Phillips screwdriver • Threadlock

1

• 2

/2" spinner (white) • Ruler

Step 1

Position the engine mount on the firewall. Use four
8-32 x 1" screws and four #8 washers to attach the
mount to the firewall. Make sure to use threadlock
on the screws to prevent them from loosening during
flight.

Step 2

Slide the engine into position onto the mount as
shown. Position the engine on the mount so the drive

3

washer is 4

/4" in front of the firewall.

Step 3

Use a felt-tipped marker to mark the locations for the
engine mounting bolts.

24

Step 4

Drill four 3/16" holes at the locations marked in the
previous step. It is suggested to use a drill press for
the best results.

Section 9: Engine Installation

Step 5

1

Install four 8-32 x 1

/2" screws, 8-32 locknuts and #8
washers.Tighten the four screws evenly to secure the
position of the engine.

Step 7

Connect the fuel lines to the engine. The red line
(vent) goes to the muffler, the green line (pickup)
to the carburetor.

Step 8

Use the instructions provided with your engine to
install the propeller and spinner.

Step 6

Use the hardware and instructions provided with
the engine to attach the muffler.

25

Section 10: Control Linkage Installation

Required Parts

• Nylon clevis (5) • Clevis retainer (5)

• Nylon wire keeper (5) • Brass wire connector

• Nylon control horn (2) • 3mm x 5mm screw

• 2mm x 18mm bolt (6)

• Nylon connector keeper

• 3/32" x 15

• 3/32" x 29

3

/4" throttle pushrod

3

/4" rudder pushrod

• 3/32" x 32" elevator pushrod

• 3/32" x 5" aileron pushrod (2)

Required Tools and Adhesives

• Phillips screwdriver • Threadlock

• Drill • Drill bit: 5/64", 3/32"

Step 1

Use the instructions included with your radio and
charge both the transmitter and receiver batteries
before starting this section. Once the batteries are
fully charged, turn on both the transmitter and
receiver. Check that the trim levers are centered.
Move the transmitter sticks and verify the radio
is working properly.

Step 3

Locate the 3/32" x 32" elevator pushrod
wire inside the fuselage.

Step 4

Install the elevator control horn using three
2mm x 18mm bolts.

Step 2

Install the servo arms on the servos. The radio
should be on and the trim levers centered. Also have
the throttle stick and trim centered when installing
the arm on the throttle servo.

26

Section 10: Control Linkage Installation

Step 5

Place a clevis retainer onto a clevis. Thread the clevis
12 turns onto the elevator pushrod wire.

Step 6

Drill the outer hole in the elevator servo arm using
a 5/64" drill bit.

Using the nylon wire keepers is simple,
and they provide an excellent way to attach
pushrod wires to servo arms.

The first step is to have a 90-degree bend in
the pushrod wire. For the Alpha™ trainer, there
90-degree bends have already been made.

Install the bend into the servo arm. In most
cases a hole will need to be drilled in the
servo arm that the wire can fit through.

Place the nylon wire keeper onto the end of
the pushrod wire that passes through the
servo arm.

Step 7

Secure the elevator pushrod wire to the servo arm
using a nylon wire keeper.

27

There is a notch in the keeper that runs
parallel to the main pushrod wire. This allows
you to snap the keeper onto the pushrod wire.
It may take small pliers to get the keeper to
snap onto the wire.

Section 10: Control Linkage Installation

Step 9

With the radio on, attach the clevis to the outside
hole on the elevator control horn.

Step 10

Step 8

Install the screw to secure the servo arm
on the servo.

With the radio on, use a straight edge to make sure
the elevator is in line with the stabilizer. If not,
thread the clevis in or out on the pushrod wire until
the elevator and stabilizer are in alignment.

28

Section 10: Control Linkage Installation

Step 11

Drill a 3/32" hole in the outer hole in the rudder
servo arm as shown.

Step 12

Remove the servo arm. Slide the brass wire connector
into the hole. Secure the connector using the nylon
connector keeper.

Step 13

Slide the steering wire through the brass wire
connector. Place the servo arm back onto the
rudder servo.

Step 14

Position the nose wheel so it is in line with the
centerline of the fuselage. Use a 3mm x 5mm screw
to secure the steering pushrod wire.

Note: If your plane does not track straight
on the runway, loosen the screw and adjust
the nose wheel. Changing the rudder trim
will change the steering trim, but will trim
the rudder also. Use the trim for in-flight
adjustments, and the screw for steering.

29

Section 10: Control Linkage Installation

Step 15

3

Locate the 3/32" x 29

/4" rudder pushrod

wire inside of the fuselage.

Step 16

Install the rudder control horn using three 2mm x
18mm screws.

Step 17

Place a clevis retainer onto a clevis. Thread the clevis
12 turns onto the rudder pushrod wire.

Step 19

Secure the rudder pushrod wire to the servo arm
using a nylon wire keeper.

Step 20

Attach the clevis to the center hole on the rudder
control horn.

Step 18

Drill the outer hole in the rudder servo arm using a
5/64" drill bit.

30

Section 10: Control Linkage Installation

Step 21

With the radio on, use a straight edge to make sure
the rudder is in line with the fin. If not, thread the
clevis in or out on the pushrod wire until the rudder
and fin are in alignment.

Step 22

Install the screw in the servo arm to secure it
to the servo.

Step 23

3

Locate the prebent 15

/4" throttle pushrod wire. Place
a clevis retainer onto a clevis. Thread the clevis
12 turns onto the throttle pushrod wire. Slide the
pushrod wire into the fuselage.

Step 24

Drill both holes next to the fuselage in the throttle
servo arm using a 5/64" drill bit.

31

Section 10: Control Linkage Installation

Note: The next few steps may take a bit of
trial and error to get the throttle operating
correctly. It is suggested to work slowly until
the throttle operates as described. Also, a
computer radio can make this a much easier
job if you happen to own one.

Step 25

Attach a brass connector to the throttle servo arm.
Slide the pushrod wire through the connector.

Step 26

Turn on both the transmitter and receiver. Move the
throttle stick to the fully open position. Attach the
clevis to the carburetor control arm. At this time,
it really doesn’t matter which hole. Position the
pushrod so the carburetor is at the “wide open”
position. Temporarily tighten the screw to secure
the pushrod wire.

32

Section 10: Control Linkage Installation

Step 27

Move the throttle stick and trim to the closed
position. The carburetor should move to the
fully closed position.

This is all done to allow for a full range of
operation of the carburetor using the radio.

If you must move the linkage, return to
Step 26 and start over the process of
adjusting the clevis.

Step 28

Move the trim lever up, but leave the stick down. The
carburetor should open about 1/16".

If the servo is binding, you may need to
reduce the amount of travel mechanically.
Moving the clevis away from the center
on the carburetor arm, or the linkage
towards the center on the servo arm will
accomplish this.

If the carburetor is not closing, you need to
increase the amount of travel mechanically.
Moving the clevis toward the center
on the carburetor arm, or the linkage
away from the center on the servo arm will
accomplish this.

3333

Section 10: Control Linkage Installation

Step 28

Once the throttle servo has been adjusted, install the
nylon wire clevis and screw in the servo arm.

Step 29

Place a clevis retainer onto a clevis. Thread the clevis
12 turns onto the 3/32" x 5" aileron pushrod wire.

Step 30

Thread a nylon control horn onto the aileron control
wire. Adjust the horn so it is 1" from the surface of
the wing.

Step 32

Secure the aileron pushrod wire to the servo arm
using a nylon wire keeper.

Step 33

Attach the clevis to the aileron control horn.

Step 34

With the radio on, check to make sure the aileron is
in line with the center area of the wing. If not, thread
the clevis in or out on the pushrod wire until the
aileron and wing are in alignment.

Step 31

Drill the outer hole in the aileron servo arm using
a 5/64" drill bit.

34

Step 35

Repeat Steps 29 through 34 for the remaining
aileron linkage.

Step 36

Install the screw in the servo arm to secure it
to the servo.

Section 11: Wing Installation (Rubber Band Option)

Required Parts

• Wing • Fuselage

• Wing dowel (2) • Rubber band (10)

Required Tools and Adhesives

• Medium CA

Step 1

Insert one of the wing dowels into the holes in the
fuselage at the front of the wing saddle. Center the
dowel in the fuselage.

Hint: Apply a thin layer of CA to the
exposed dowel to prevent fuel from soaking
into the dowel.

Step 3

Repeat Steps 1 and 2 for the rear wing dowel. Allow
the CA to fully cure before continuing.

Step 4

Plug the aileron servo into the aileron extension.
Attach the wing to the fuselage using 14 rubber
bands. The first set of rubber bands should cross as
shown. Alternate straight and crossed until all but
the last two rubber bands are installed. The last two
should cross, as this helps hold the other rubber
bands on the dowels.

Step 2

Apply medium CA to the dowel where it enters the
fuselage. The CA will seep into fuselage, securing
the wing dowel.

35

Section 11: Wing Installation (Rubber Band Option)

A good general rule is using at least two
rubber bands per pound of airplane. A
5-pound plane will use 10 rubber bands.
Using more than the recommended amount
is fine, just don’t go overboard.

When removing the rubber bands, place
them in a container with a small amount
of talcum powder. This will soak up some
of the fuel from the rubber bands, making
them last longer.

Also note: When putting on the rubber
bands, start from the front dowels at the
leading edge of the wing and stretch them to
the dowels at the trailing edge of the wing.
This applies greater pressure to the leading
edge of the wing and keeps it from raising
in flight.

Section 11: Wing Installation (Bolt-On Option)

Required Parts

• Wing • Fuselage

• 1/4-20 x 2" wing bolt (2) • Wing dowel (2)

Required Tools and Adhesives

• 6-minute epoxy • Hobby knife

Step 1

Use a hobby knife to remove the covering to expose
the wing dowel holes in the leading edge of the wing.

Step 2

Use 6-minute epoxy to glue the dowels into the
leading edge of the wing.

Step 3

Use a hobby knife to remove the covering from the
trailing edge of the wing using a sharp hobby knife.

Section 11: Wing Installation (Bolt-On Option)

Step 3

Position the wing onto the fuselage. Bolt the wing into
position using the two 1/4-20 x 2" wing bolts.

Section 12: Control Throws

Step 1

Check to make sure the controls move the
right direction when using the transmitter. Use
the following photos to make sure things are
working correctly.

Photo for Step 1

Photo for Step 1

37

Photo for Step 1

Photo for Step 1

Section 12: 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 the clevis toward the control
surface will increase the amount of throw.

Step 2

Adjust the amount of control throw on each surface
as indicated. Control throws are measured at the
widest part of the elevator, rudder, and aileron.

Elevator 1/2" up 1/2" down
Rudder 11/4" right 11/4" left
Aileron 3/8" up 3/8" down

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.

Step 3

Once the control throws have been set, slide the
clevis retainers onto the clevises. This will prevent
them from opening during flight due to vibration.

38

Section 13: Center of Gravity

An important part of preparing the aircraft for flight is
properly balancing the model.
Do not inadvertently skip this step!
This is especially important when various engines
are mounted.

The recommended Center of Gravity (CG) location for
the Alpha is 4

1

/4" behind the leading edge of the wing

against the fuselage.

Step 1

Turn the wing (and plane, if assembled) upside down.
Where the sheeting stops on the underside of the

1

wing, measure back 4

/4" from the leading edge of
the wing and use a felt-tipped pen at the location.
This will be the balance point.

Step 2

Attach the wing as described in Section 11. Turn the
model upright and lift the model at the marks made
in the previous step. It should balance with the
fuselage level or with the nose down slightly when
balanced correctly.

If the plane hangs with the tail down, some
weight must be added to the nose of the plane.

If the plane hangs with the nose down, weight
must be added to the tail of the plane to correct
the balance.

Tail Heavy

Nose Heavy

CG Correct

Stick-on weights are available at your local hobby
shop and work well for this purpose.

39

Section 14: Range Testing the Radio

Before each flying session, range-check your radio.
This is accomplished by turning on your transmitter
with the antenna collapsed. Turn on the radio in
your airplane. With your airplane on the ground,
you should be able to walk 30 paces away from
your airplane and still have complete control of all
functions. If not, don't attempt to fly! Have your radio
equipment checked out by the manufacturer.

Section 15: 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.

Section 16: Preflight

Note: If this is your first RC model, it is
highly recommended you seek the assistance
of a qualified RC flight instructor. Do not
attempt to fly the model alone.

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.

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.

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.

40

Glossary of Terms

• Ailerons: Each side of this airplane has a hinged

control surface (aileron), located on the trailing edge of
the wing. Move the aileron stick on the transmitter left,
the left aileron moves up and the right aileron moves
down. Moving the left aileron up causes more drag and
less lift, causing the left wing to drop down. When the
right aileron moves down, more lift is created, causing
the right wing to rise. This interaction causes the
airplane to turn or roll to the left. Perform the opposite
actions, and the airplane will roll to the right..

• Clevis: The clevis connects the wire end of the pushrod

to the control horn of the control surface. A small clip,
the clevis has fine threads so that you can adjust the
length of the pushrod.

• Control Horn: This arm connects the control surface to

the clevis and pushrod.

• Dihedral: The degree of angle (V-shaped bend) at which

the wings intersect the fuselage is called dihedral. More
dihedral gives an airplane more aerodynamic stability.
Some sailplanes and trainer planes with large dihedral
dispense with ailerons and use only the rudder to
control the roll and yaw.

• Elevator: The hinged control surface on the back of

the stabilizer that moves to control the airplane’s pitch
axis. Pulling the transmitter’s control stick toward the
bottom of the transmitter moves the elevator upward,
and the airplane begins to climb. Push the control stick
forward, and the airplane begins to dive.

• Fuselage: The main body of an airplane.

• Hinge: Flexible pieces used to connect the control

surface to the flying surface. All hinges must be glued
properly and securely to prevent the airplane from
crashing. (This has already been done for you on the
Alpha Advanced trainer.)

• Nose Gear: The part of the landing gear that is attached
to the nose of the fuselage. The nose gear is usually
connected to the rudder servo to help you steer the
airplane on the ground.

• Pitch Axis: The horizontal plane on which the airplane’s
nose is raised or lowered. By moving the elevator,
you can raise the airplane’s nose above the pitch axis
(climb) or lower it below the pitch axis (dive).

• Pushrod: The rigid mechanism that transfers movement
from the servo to the control surface.

• Roll Axis: The horizontal plane on which the airplane’s
wings are raised or lowered. By adjusting the ailerons,
you can drop a wing tip below the roll axis and cause
the airplane to bank or roll.

• Rudder: The hinged control surface on the vertical
stabilizer that controls the airplane’s yaw. Moving
the rudder to the left causes the airplane to yaw left;
moving the rudder to the right causes it to yaw right.

• Servo: The servo transforms your ground commands
into physical adjustments of the airplane while it’s in
the air.

• Servo Output Arm: A removable arm or wheel that
connects the servo to the pushrod (also called servo
horn).

• Spinner: Term describing the nose cone that covers the
propeller hub.

• Threadlock: A liquid that solidifies; used to prevent
screws from loosening due to vibration.

• Torque Rods: Inserted into the ailerons, these rigid
wire rods run along the wing’s trailing edge, then bend
downward and connects to the pushrod.

• Vertical Stabilizer: The vertical flying surface of the tail
gives an airplane stability while in flight.

• Horizontal Stabilizer: The horizontal flying surface of
the tail gives the airplane stability while in flight.

• Leading Edge: The front of a flying surface.

• Main Landing Gear: The wheel and gear assembly the
airplane uses to land. It is attached to the bottom of the
fuselage.

• Wheel Collar: The round retaining piece that anchors
wheels in place on the wheel axle.

• Wing: The lifting surface of an airplane.

• Yaw Axis: The vertical plane through which the
airplane’s nose rotates as it yaws to the left or to the
right. The rudder controls the yaw axis.

41

2004 Official AMA

National Model Aircraft Safety Code

Effective January 1, 2003

Model Flying MUST be in accordance with this Code in order for AMA Liability Protection to apply.

GENERAL

1) I will not fly my model aircraft in sanctioned
events, air shows or model flying demonstrations
until it has been proven to be airworthy by having
been previously, successfully flight tested.

2) I will not fly my model higher than approximately
400 feet within 3 miles of an airport without notifying
the airport operator. I will give right-of-way and avoid
flying in the proximity of full-scale aircraft. Where
necessary, an observer shall be utilized to supervise
flying to avoid having models fly in the proximity of
full-scale aircraft.

3) Where established, I will abide by the safety rules
for the flying site I use, and I will not willfully and
deliberately fly my models in a careless, reckless
and/or dangerous manner.

4) The maximum takeoff weight of a model is 55
pounds, except models flown under Experimental
Aircraft rules.

5) I will not fly my model unless it is identified with
my name and address or AMA number, on or in the
model. (This does not apply to models while being
flown indoors.)

6) I will not operate models with metal-bladed
propellers or with gaseous boosts, in which gases
other than air enter their internal combustion
engine(s); nor will I operate models with extremely
hazardous fuels such as those containing
tetranitromethane or hydrazine.

7) I will not operate models with pyrotechnics (any

device that explodes, burns, or propels a projectile
of any kind) including, but not limited to, rockets,
explosive bombs dropped from models, smoke
bombs, all explosive gases (such as hydrogen-filled
balloons), ground mounted devices launching a
projectile. The only exceptions permitted are rockets
flown in accordance with the National Model Rocketry
Safety Code or those permanently attached (as per
JATO use); also those items authorized for Air Show
Team use as defined by AST Advisory Committee
(document available from AMA HQ). In any case,
models using rocket motors as a primary means of
propulsion are limited to a maximum weight of 3.3
pounds and a G series motor. (A model aircraft is
defined as an aircraft with or without engine, not able
to carry a human being.)

8) I will not consume alcoholic beverages prior to,

nor during, participation in any model operations.

9) Children under 6 years old are only allowed on the

flight line as a pilot or while under flight instruction.

RADIO CONTROL

1) I will have completed a successful radio equipment

ground range check before the first flight of a new or
repaired model.

2) I will not fly my model aircraft in the presence

of spectators until I become a qualified flier, unless
assisted by an experienced helper.

3) At all flying sites a straight or curved line(s) must

be established in front of which all flying takes place
with the other side for spectators. Only personnel
involved with flying the aircraft are allowed at or in
the front of the flight line. Intentional flying behind
the flight line is prohibited.

4) I will operate my model using only radio control

frequencies currently allowed by the Federal
Communications Commission. (Only properly
licensed Amateurs are authorized to operate
equipment on Amateur Band frequencies.)

42

2004 Official AMA

National Model Aircraft Safety Code

5) Flying sites separated by three miles or more
are considered safe from site-to site interference,
even when both sites use the same frequencies. Any
circumstances under three miles separation require
a frequency management arrangement, which may
be either an allocation of specific frequencies for
each site or testing to determine that freedom from
interference exists. Allocation plans or interference
test reports shall be signed by the parties involved
and provided to AMA Headquarters. Documents of
agreement and reports may exist between (1) two
or more AMA Chartered Clubs, (2) AMA clubs and
individual AMA members not associated with AMA
Clubs, or (3) two or more individual AMA members.

6) For Combat, distance between combat engagement
line and spectator line will be 500 feet per cubic
inch of engine displacement. (Example: .40 engine
= 200 feet.); electric motors will be based on
equivalent combustion engine size. Additional safety
requirements will be per the RC Combat section of
the current Competition Regulations.

7) At air shows or model flying demonstrations, a
single straight line must be established, one side of
which is for flying, with the other side for spectators.

8) With the exception of events flown under AMA
Competition rules, after launch, except for pilots or
helpers being used, no powered model may be flown
closer than 25 feet to any person.

9) Under no circumstances may a pilot or other
person touch a powered model in flight.

Organized RC Racing Event

10) An RC racing event, whether or not an AMA Rule

Book event, is one in which model aircraft compete
in flight over a prescribed course with the objective of
finishing the course faster to determine the winner.

A. In every organized racing event in which
contestants, callers and officials are on the course:

1. All officials, callers and contestants must properly

wear helmets, which are OSHA, DOT, ANSI, SNELL or
NOCSAE approved or comparable standard while on
the racecourse.

2. All officials will be off the course except for the

starter and their assistant.

3.”On the course” is defined to mean any area beyond

the pilot/staging area where actual flying takes place.
B. I will not fly my model aircraft in any organized

racing event which does not comply with paragraph A
above or which allows models over 20 pounds unless
that competition event is AMA sanctioned.

C. Distance from the pylon to the nearest spectator
(line) will be in accordance with the current
Competition Regulations under the RC Pylon Racing
section for the specific event pending two or three
pylon course layout.

11) RC night flying is limited to low-performance

models (less than 100 mph). The models must be
equipped with a lighting system that clearly defines
the aircraft’s attitude at all times.

43

© 2004, Horizon Hobby, Inc.

WE GE T P EOP LE FLY ING

TM

®

4105 Fieldstone Road

Champaign, Illinois 61822

[phone]

www.horizonhobby.com

# 6140