Page 1
Specifications
Wingspan: . . . . . . . 63 in (1600mm)
Length: . . . . . . . . 52.5 in (1334mm)
Wing Area: . 710 sq in (45.8 sq dm)
Weight: . . . . . . . . . . . 5.7 lb (2.6 kg)
The Evolution Trainer
Power System.
Engineered for ease...
first flight, every flight.
Featuring the Unique Evolution Trainer Power System
INSTRUCTION MANUAL
Semi-Symmetrical Trainer
WE GET PEOPLE FLYING
TM
®
Page 2
2
Section 1. Assemble Wing
Section 2. Mount Main Landing Gear
Tape Strip
Wood Screws
Page 3
3
Section 3. Bolt on Tail
Rubber Bands (4 per side to hold wing)
Small Washers
Long Screws
Large Washers
Assembly Diagram
Please carefully read through the entire
instruction manual before beginning assembly
of the Arrow Semi-Symmetrical Trainer Ready-To-Fly (RTF) kit.
Page 4
Small Parts Layout
4
Table of Contents
Assembly Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Large Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Small Parts Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Section 1: Assembly of the Wing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Section 2: Installing the Main Landing Gear/Wing Hold-Down Dowels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Section 3: Installing the Tail Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Final Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Center of Gravity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Control Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Preflight Checks at the Field . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Evolution Trainer Power System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Starting the Evolution Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Engine Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Flying the Arrow Advanced Trainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
AMA Safety Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Glossary of Terms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Large Parts Layout
1. Wing Set HAN2551
2. Fuselage HAN2552
3. Tail Set HAN2553
4. Wing Joiner HAN2554
5. Engine (Evolution Trainer Power System)
6. Nose Gear
7. Main Landing Gear
A. Tail and Landing Gear Hardware
B. Center Wing Tape
C. #64 Rubber Bands
D. Wing Dowels
E. Transmitter and Receiver Charger
F. Radio Frequency Identifiers
G. Extra Servo Accessories (not used)
1
3
2
5
6
7
A
B
C
D
E
F
G
4
Items not shown:
Decal Set HAN2555
Page 5
5
Section 1: Assembly of the Wing
Carefully remove the contents of the Arrow Trainer Ready-To-Fly
kit. It is recommended that you charge the transmitter and receiver
batteries 24 hours prior to flying your model.
Step 1
Remove each wing from its protective plastic bag. Remove the
pieces of tape that hold the ailerons in place for shipping. The
hinges in the Arrow T rainer have already been glued in place during
manufacturing. Check the ailerons for security by gently pulling
on them, trying to separate them from the wing.
Be careful not to damage the wing structure.
Step 2
Locate the aluminum wing tube and carefully slide it into the
opening in one of the wing halves. The fit may be snug, so use a
twisting motion while inserting the tube. There is a short metal
pin located near the trailing edge that will key into the opposite
wing panel and keep the wing from rotating around the wing tube.
Carefully slide the other wing half onto the wing tube. Align the
metal pin with its hole and press the wing panels together.
Step 3
Locate the clear wing joiner tape and apply it to the top and bottom
of the wing along the joint. Start at the top of the trailing edge and
wrap it around the front of the wing and to the bottom trailing edge.
Step 4
The aileron servo lead has been wrapped around the linkage for
shipment. Untie the servo lead to free up the aileron linkage.
Note that the lead has been labeled with a piece of tape; do not
remove this tape. One of the aileron linkages has already been
connected to the aileron and secured with a small piece of tubing
(clevis keeper). This is done to prevent the clevis from opening
during flight.
Connect the other aileron linkage to the aileron and snap the clevis
in place. Slide the clevis keeper over the clevis to secure the linkage
to the aileron.
You have successfully assembled the wing of the Arrow Trainer.
Step 3
Wrap supplied
clear tape around
the center joint.
Step 1
Remove shipping tape.
Step 2
Slide both wing panels onto
the metal tube.
Step 4
Attach clevis.
Bottom view of wing
Page 6
6
Section 2: Installing the Main Landing
Gear/Wing Hold-Down Dowels
Step 1
Locate the two landing gear wires, two nylon landing gear straps
and the four 3mm x 10mm sheet metal screws. The wheels have
already been installed for you. On the bottom of the fuselage, you
will find a groove with a hole near each side of the fuselage to
accept the landing gear wire. The landing gear wire slides into the
hole and lies across the bottom of the fuselage. Install both landing
gear wires.
Step 2
With the landing gear wires installed, secure them to the fuselage
using the two nylon landing gear straps and four 3mm x 10mm
sheet metal screws. The straps lay across the wires and the
screws go into the predrilled holes on the bottom of the fuselage.
Step 3
Locate the two wing hold-down dowels and, using a twisting
motion, carefully insert one into each of the two holes located in
the fuselage. The dowels should be positioned so an equal
amount protrudes from each side of the fuselage.
Step 1
Mount landing gear to
fuselage with the two
straps and four screws.
Wood Screw (4)
Step 2
Landing Gear Strap (2)
Page 7
Section 3: Installing the Tail Assembly
7
Locate the horizontal stabilizer and vertical stabilizer assemblies.
The rudder and elevator have been prehinged at the factory, and
the control horns are also attached.
Remove the shipping tape holding the rudder and elevator in place.
Check both the rudder and elevator for freedom of movement.
Step 1
The vertical stabilizer has threaded rods in the bottom that secure
it to the horizontal stabilizer. Insert the threaded rods through the
predrilled holes in the horizontal stabilizer. Secure them together
using two large washers and wing nuts. Be sure to use a drop of
threadlock on the threaded rods before tightening the wing nuts.
Step 2
Slide the tail assembly into the slot in the rear of the fuselage,
making sure the rudder pushrod is on top of the horizontal
stabilizer. Use the two long screws and two small washers to
secure the tail assembly to the fuselage. There is a hole in the
bottom of the fuselage to access the forward screw location. Place
a drop of threadlock on the screws before installing them.
Hint: Use a magnetic screwdriver when installing the screws.
Threadlock
Threadlock
Attach the vertical stabilizer
to the horizontal stabilizer
using washer and wing nut.
Apply threadlock to
the threaded rods
before installing
the wing nuts.
Slide tail assembly into the
slot at the fuselage rear.
Large
Washer
Wing Nut
Small Washer
Long Screw
Step 1
Step 2
Apply threadlock to the
screws before installing.
Large Washer
Wing Nut
Horizontal Stabilizer
Vertical
Stabilizer
Page 8
8
Final Assembly
Plug the aileron servo connector into the connector marked
“aileron” located in the fuselage. This will connect the aileron
servo in the wing to the aileron channel of your receiver.
Temporarily attach the wing to the fuselage by stretching a rubber
band from wing hold-down dowels starting at the leading edge of
the wing back to the trailing edge of the wing. For now, use two
rubber bands to mount the wing in position.
Aileron
Charger
Center of Gravity (CG)
The Arrow Trainer has been balanced at the factory.
If changes are made in battery location or a different engine is
installed, you will need to make sure the balance of the aircraft is
correct before attempting to fly it. The balance point (center of
gravity) of the Arrow is 3
1
/8" from the leading edge of the wing. If
you must add weight to the nose or tail, use the stick-on variety
available at your local hobby shop.
Step 3
Connect the rudder and elevator pushrod clevises to the preinstalled
control horns. Install the clevises into the hole furthest away from
the control surface (see illustration). Secure each clevis to the
control horn by snapping the clevis pin into the hole. To prevent
the clevises from accidentally opening in flight, make sure to slide
the clevis keeper up onto the clevis.
Section 3: Installing the Tail Assembly
Continued
Clevis Keeper
Clevis Keeper
Step 3
The rudder pushrod is
positioned above the
horizontal stabilizer.
Page 9
9
Control Checks
The correct servo directions are preadjusted, but it’s a good idea
to confirm the correct direction. After charging the transmitter and
receiver batteries per the instruction included with the radio, turn
on the transmitter and airplane and check that the controls are
moving in the correct direction, as per the illustration below.
Elevator: Moving the right
stick down should cause the
elevator to move upward.
Pushing the right stick up
will cause the elevator to
move down.
Aileron: Moving the right
stick to the right should
move the right aileron up
and the left aileron down.
Moving the stick in the
opposite direction will give
the opposite result.
Rudder: Moving the left
stick to the right should
move the rudder to the right.
Moving the stick to the left
moves the rudder to the left.
Throttle: Look into the
carburetor. With the throttle
(left stick) in the up position,
the carburetor should be fully
open. With the throttle in the
lower position and trim lever
at the mid-point, the carburetor should be 1/16" open.
It is very important that you make sure the control surfaces (rudder,
elevator and ailerons) are at 0 degrees when the transmitter control
sticks and trim levers are centered. Turn on your transmitter and
receiver. Make sure the rudder, elevator and aileron sticks are
centered and the trim levers are centered. Place a ruler against the
control surfaces to see if there are any deflections from the center
(0 degrees).
Adjustments to the control surfaces can be made by temporarily
disconnecting the clevis from the horn and threading the clevis in
or out on the control rod. Threading in causes the surface to move
toward the rod. Threading out causes the surface to move away
from the rod. Set the control surfaces, ailerons, elevator and rudder
to 0 degrees.
Reconnect the clevises to the outer hole of the control horn of
the rudder and elevator control horns. Make sure that the clevis
keepers are in place.
0°
Preflight Checks at the Flying Field
Important: Be sure your batteries are fully charged,
per the instructions included with your radio system.
Before each flight, check the screws and nuts that secure the
metal plate holding the engine in place on the engine mount. Also
check the clevises of each control surface for security and presence
of a clevis keeper.
Check the screws that hold the tail assembly in place, as they can
loosen during flight.
Check the muffler screws that attach the muffler to the engine
after every flight.
Perform a ground range check before each day’s flying as follows:
1. Do not extend the transmitter antenna. Turn the transmitter on.
2. Turn the model on.
3. Slowly walk away from the model while moving the control
surfaces. The aircraft should function properly at a distance
of 75–100 feet.
4. Make sure all trim levers on the transmitter are in the
proper position.
5. Make sure all servos and switch harness plugs are secure.
ELEVATOR
ELEVATOR
AILERON
AILERON
AILERON
RUDDER
CARBURETOR
Full open
THROTTLE
1/16”
RUDDER
Page 10
Evolution Trainer Power System
The Evolution T rainer Power System has been specifically designed
with the first time pilot in mind. The engine and special three
blade propeller have been designed to give your Arrow Trainer the
optimum performance for training new RC pilots. The engine is
designed for easy starting and reliable idle to give you confidence in
your equipment, allowing you to concentrate on developing your
piloting skills.
Benefits of the Evolution Trainer Power System
• Lower noise level than standard 10 x 6 prop, baffle in muffler
lowers noise even more
• Smaller speed envelope—the 3-bladed prop design has
a lower top speed, so overspeeding the model is less likely;
this gives the beginner more reaction time while still
providing lots of power to climb out of bad situations
• Pre-set needle settings—ready-to-run out of the box
• Needle valve limiters make it impossible for beginners to
adjust the needles valves wrong to the point that the engine
will not run
• User friendly—easy to start from first try with super reliable
idle and no break-in needed
Warning: Before operating your engine, read and
follow all safety points. A rotating propeller can cause
serious personal injury.
Follow these instructions carefully! If this is the first time you
have run a model airplane engine, we recommend that you seek
the help of an experienced modeler. Your local hobby shop can
put you in contact with the flying club in your area.
• Only use a “Start Stick” or electric starter to start the engine.
• Only make adjustments to the carburetor from behind the engine.
• Keep spectators at least 20 feet away and out of the path of a
rotating propeller
• Wear safety glasses and hand protection when operating
model engines. Do not permit any objects to touch a turning
propeller. Remain clear of the propeller plane of rotation.
• To stop the engine, cut off the fuel and air supply by moving
the throttle stick and trim lever down to close the carburetor.
Do not stop the propeller with your hand or other object.
• Inspect the propeller after each flight; discard any propeller
that has nicks, scratches or any other visible defect. Do not
repair, alter or in any way modify a propeller. Replacement
propellers are available through your local hobby retailer.
10
20 feet
Page 11
11
Starting the Evolution Engine
Field Equipment Needed
The following are included in the Hangar 9®Start-Up Field
Accessory Pack (HANSTART)
• Sturdy cardboard construction tote box
• Manual fuel pump
• Hangar 9 glow plugs (2)
• 4-way wrench
• Rechargeable glow driver with charger
• Start stick
Other Items Needed
(not included in Start-Up Field Accessory Pack)
• Fuel, 10 to 15% nitro content
(Cool Power or Powermaster recommended)
• Electric starter (optional)
Step 1
Fill the fuel tank with the proper fuel. We recommend 10% or
15% nitro content such as Cool Power or Powermaster fuel. Fill
the tank by connecting the fuel pump to the line that is connected
to the remote needle valve assembly. Disconnect the fuel line
attached to the pressure fitting of the muffler; your tank is full
when fuel begins to run out of the pressure line. Reconnect the
fuel lines to the needle valve assembly and muffler.
Note: It is very important to reconnect the lines to
the correct place. If they are reconnected incorrectly,
the engine will not run properly.
Step 2
To prime your engine, first turn on your transmitter and then your
receiver. Move the throttle to full open and place your finger over
the carburetor opening. Turn the propeller over by hand until you
can see fuel entering the fuel line. Move the throttle stick full
down to idle.
Caution: Always have a helper hold your plane when
starting the engine.
Step 3
Move the throttle to the low position and the throttle trim lever to
the middle position. Place the glow driver on the glow plug and,
using a start stick, turn the propeller counterclockwise through
the compression stroke. You should feel a “bump” against the
start stick. When you feel the “bump,” flip the propeller counter
clockwise to start the engine. Repeat the process if the engine
does not start.
Page 12
12
Flying the Arrow Trainer
For first time pilots, the thought of flying the Arrow T rainer through
loops, rolls and perfect three-point landings can be thrilling.
Learning to fly, however, takes time, patience, most importantly ,a
good instructor. If you’re a first time pilot, don’t try to fly your
model without an experienced instructor. Your local hobby shop
can put you in touch with an instructor in your area who can test
fly your Arrow Trainer, and then give you your first chance on the
“sticks” with very little risk of damage to the airplane. We cannot
over emphasize the importance of having a qualified instructor to
help you through your first flights.
The JR™ Quattro radio system has a built-in trainer system or
“buddy box” option. The transmitter can be used with any JR
transmitter and a trainer cord (JRPA130). Use of the “buddy box”
for the first few flights is highly recommended.
More experienced pilots will find the Arrow Trainer to be a
confidence-inspiring airplane. Its super stable and slow-flight
characteristics make pinpoint landings easy. At full throttle, the
Arrow Trainer is more than capable of most Sport
aerobatics maneuvers, making it truly the trainer that goes
where you point it.
Repair Information
Should you have the misfortune of a crash or broken part, see your
local hobby dealer for replacement parts.
Engine Adjustments
Model engines run on a mixture of fuel and air. The high-speed
and low-speed needle valves control the ratio of fuel to air that
the engine receives. If you find that small adjustments are needed,
have an experienced modeler help you to fine-tune your engine.
Do not attempt to move the needles past the preset stops.
Warning: Make all adjustments to the Evolution engine’s
low-speed needle valve with the engine stopped.
Our technicians have preset the needle valves of the Evolution
engine. Your engine should run properly at these preset needle
settings. On occasion, depending on your location, you may find
it necessary to adjust the high-speed and low-speed needle
valves to optimize the performance of your engine. The needle
valves have limiters to allow small adjustments to the engine.
The low-speed needle valve limiter allows 1/4 turn of the needle
valve, turning clockwise (in) will lean the mixture while turning
counterclockwise (out) will richen the mixture to the low-speed
or idle setting of the engine. The high-speed needle valve limiter
allows one full turn of the needle valve. As with the low-speed
adjustment, turning the high-speed needle valve clockwise (in)
will lean the mixture, while turning counterclockwise (out) will
richen the mixture of the high-speed setting of the engine.
Fine-Tuning the High-Speed Needle
Start your engine and advance the throttle to full, then pinch the
red fuel line going to the engine. If the engine dies immediately
without an increase in rpm, the setting is too lean. Adjust the
high-speed needle valve counterclockwise (out) 1/2 turn and
repeat the test. When the high-speed needle is adjusted correctly,
the engine should increase rpm slightly and then quit. If the
engine rpm increases more than 200–300 rpm and continues to
run, the needle valve setting is too rich. Adjust the needle valve
clockwise (in) 1/8th of a turn and repeat the test until the engine
responds correctly to the pinch test.
Fine-Tuning the Low-Speed Needle
After fine-tuning the high-speed needle, you can begin to test the
low-speed needle. Start your engine and go to full throttle for
approximately 5–10 seconds then return to idle. Pinch the red
fuel line going to the engine. If the engine dies immediately
without an increase in rpm, the setting is too lean. Adjust the
needle valve counterclockwise (out) 1/8th of a turn and repeat the
test. When the low-speed needle is adjusted correctly, the engine
should increase rpm slightly and then quit. If the engine rpm
increases more than 200–300 rpm and continues to run, the
needle-valve setting is too rich. Adjust the needle valve clockwise
(in) 1/16th of a turn and repeat the test until the engine responds
correctly to the pinch test.
High-Speed Needle Adjustment
Low-Speed Needle
Adjustment
Page 13
13
AMA Safety Code
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 or deliberately fly my
model 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 hydrogenfilled 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
an 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 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.)
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, the distance between the combat engagement
line and the 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, with one side for flying, 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.
1994 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.
Page 14
14
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.
• Carburetor: By adjusting the needle valve in the carburetor ,
you control the engine’s lean/rich fuel mixture and set the
engine for correct operation.
• Charger: This is the device used to charge/recharge batteries.
If Ni-Cd batteries are provided with the radio, a charger is
usually provided as well.
• 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.
• Clunk: Located inside the fuel tank, a clunk is weighted and
ensures that the intake line has a steady supply of fuel regardless of the altitude of the airplane.
• Control Horn: This arm connects the control surface to the
clevis and pushrod.
• Control Surfaces: The moveable part of the wing and tail that
cause the aircraft to roll (aileron), pitch (elevator) or yaw (rudder).
• Dead Stick: When the airplane is in flight, gliding without the
engine running, it is called “dead stick.”
• 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.
• Electric Starter: This is the small motor commonly used to
start the airplane’s engine.
• 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.
• Expanded Scale Voltmeter (ESV): This device is used to
check the voltage of the battery pack.
• Flight Box: The box in which you store and transport your
flying equipment is called a flight box.
• Flight Pack or Airborne Pack: These interchangeable terms
describe the radio equipment that is installed on the airplane.
• Fuel Overflow Line (Vent): This line connects to the muffler
and pressures the fuel tank when the engine is running. It also
functions as an overflow line when the fuel tank is full.
• Fuel Pickup Line: This line connects the fuel tank to
the carburetor.
• Fuselage: The main body of an airplane.
• Glow Plug Clip/Battery: A 1.2-volt battery with a clip that is
connected to your engine’s glow plug and is used to start the
engine. You remove it once the engine is running smoothly.
• High Wing: The term describes an airplane that has its wing
mounted on the top of the fuselage.
• 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 Arrow Advanced trainer .)
• 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.
• Muffler: This device muffles engine noise and increases the
back pressure from the engine’s exhaust stack, which can
improve the engine’s performance at low speeds. RC clubs usually require mufflers.
• Needle Valve: This mechanism within the carburetor adjusts
the fuel mixture. Refer to your instructions for
directions on how to adjust the needle valve.
• Ni-Cd: This abbreviation stands for Nickel Cadmium, the
chemical compound used in rechargeable batteries.
• Nitro: Short for nitromethane, a fuel additive that improves
an engine’s performance. 10% to 15% nitro content is
recommended for the Evolution engine.
• 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.
• Receiver: The receiver unit in an airplane receives signals from
the ground transmitter and passes the instructions along to the
airplane’s servos.
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• 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.
• Switch Harness: This switch is commonly located on the
fuselage and governs the On/Off mechanism for the flight pack.
• T achometer: A device that measures the engine’s rpm (rotations
per minute) by counting light impulses that pass through the
spinning propeller.
• 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.
• Trainer Airplane: Designed to fly with high stability at low
speeds, a trainer model airplane allows new pilots some extra
reaction time as they learn to control an airplane.
• T ransmitter: The device used on the ground to transmit
instructions to the airplane.
• Vertical Stabilizer: The vertical flying surface of the tail gives
an airplane stability while in flight.
• 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.
• Z-Bend: The wire ends of pushrods have Z-shaped bends that
attach to the servo.
Page 16
© 2003, Horizon Hobby, Inc.
4105 Fieldstone Road
Champaign, Illinois 61822
(217) 355-9511
www.horizonhobby.com
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