a reliable and safe manner. Please read the instructions and warnings carefully prior to assembly, setup or use.
As this model aircraft is a sophisticated hobby product, it must be flown with safety and common sense in mind, failure
in doing so may result in injury or property damage. This product is not intended for use by children without direct adult
supervision.
This manual contains important information that will help you maintain and operate your model aircraft in
Safety precautions and Warnings
As the user, you are solely responsible for the safe operation and maintenance of this product. Follow the directions
and warnings listed in this manual, as well as that of supporting equipment (chargers, batteries etc.) and always use
common sense.
This is not a toy. Not for children under 14 years of age.
Always operate your model in an open area away from buildings, cars, traffic or people. Never operate near
people-especially children who can wander unpredictably. Never operate in populated areas for any reason, where
injury or damage can occur.
Always keep a safe distance in all directions around your model to avoid collisions or injury. This model is controlled
by a radio signal subject to interference from many sources outside your control. Interference can cause momentary
loss of control.
Never catch the aircraft while it is in flight, the structure of the fuselage was not designed and protected for this
purpose.
Never operate your model in bad weather, including in excessively windy or precipitating conditions.
Never operate your model with low transmitter batteries.
Keep your throttle quadrant in its lowest position prior and after every flight. Use the throttle cut function if able.
Always use fully charged batteries and move batteries before disassembly.
Avoid water exposure to all equipment not specifically designed and protected for this purpose.
Avoid cleaning this product with chemicals.
Never lick or place any part of your model in your mouth as it could cause serious injury or even death.
Keep all chemicals, small parts and anything electrical out of the reach of children.
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Introduction
Arrows Hobby’ s sincere work, the 1200mm Trekker!
Arrows Hobby has always hoped that the developed model can not only meet the needs of novice players to get started, but also
meet the needs of old players to explore more gameplay. Therefore, the research and development concept it upholds has never
changed, that is, " higher stability, better handling, more possibilities". Trekker is a work based on the above standards.
Quick-release and quick-install structure, especially the buckle-designed horizontal stabilizer and front landing gear, enables the
airplane fly in the sky in five minutes upon unpacking-with a full-charged battery. It is remarkable that the fuselage adopts a two-section structure, which is convenient for carrying, storing, and replacement of accessories.
Built with ultralight EPO foam, the large wing area, high-winged airframe configuration gives the Trekker low wing-loading and
extraordinary amounts of lift, even at slow speeds. The use of the tricycle-geared layout helps to have a better rolling directionality.
The main landing gear is made of durable aluminum plates, with large spans on both sides and flat arcs, which can effectively
absorb the impact of heavy landing. Furthermore, optional floats add to the all-terrain fun of the Trekker.
The power system adopts a brushless configuration, which can burst out enough power for completing stunts such as inverted flight,
roll, somersault, and low-altitude flight.
Trekker is a typical 4-channel aircraft: throttle, elevator, rudder, aileron. For novice players, it's clear at a glance, and for old players,
it’ s greatness in simplicity
For pilots who are looking for an aircraft that has gentle trainer characteristics, plenty of power and graceful lines- the 1200mm Trekker is all of that, and more.
• Buckle-designed horizontal stabilizer and front landing gear.
• Two-section structure fuselage.
• One-piece horizontal stabilizer for accurate movement.
• Robust and durable EPO foam material.
• Optional floats for the all-terrain fun.
Table of contentsSpecifications
Introduction
Specifications
Kit contents
Model Assembly
Battery installation
Receiver diagram
Preflight check
Control horn and servo arm settings
Center of gravity(CG)
Before flying the model
Flying course
Trouble shooting
Spare parts list content
Before assembly, please inspect the contents of the kit. The photo below details the contents of the kit with labels. If any
parts are missing or defective, please identify the name or part number (refer to the spare parts list near the end of the
manual) then contact your local shop.
C.
A.
B.
04
D. E.
A: Front fuselage
B: Rear fuselage
C: Main Wing Set
D: Horizontal Stabilizer
E: Front landing gear set
F: Main landing gear set
F.
G.
J.
K.L.
I.
G: Insert plateJ: Spinner and propeller set
H.
H: Supporting bar set
I: Wing spar
K: Linkage rods
L: Screw set(15-HKM3.0*10mm、2-KA2.0*8mm)
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Model assembly
HKM3.0*10mm
HKM3.0*10mm
Fuselage installation
1. Pass the servo extension cable through the front fuselage.
2. As shown in the figure, fix the front and rear fuselage using the included screws.
(Note: please be sure that the front and rear fuselages are firmly connected before locking the screws)
Horizontal stabilizer installation
1.Align the horizontal stabilizer with the slot at the rear of the fuselage, and slide it towards the nose to tighten it.
2.Install the pushrod to the control horn on the horizontal stabilizer as shown.
Landing gear set installation
1. Align the landing gear with the slot on the bottom of the fuselage as shown, move the plastic block part out a lit to install
the front landing gear into the slot.
(Note: Check before installation to ensure that the landing gear wire is aligned with the hole position of the servo arm)
2. Secure the main landing gear onto the fuselage with the included screws with the included retainer and screws as shown.
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Model assembly
Main wing installation
1.Install the wing spar through the fuselage pass-through as shown.
2.Install the two wing halves to fuselage, with control surface facing down as shown.
3.Use the included screws to secure the wing halves to the fuselage.
4.Align the holes of support bars with the holes on the fuselage and the main wing.
5.Fix the supporting bars onto fuselage and main wing using included screws.
HKM3.0*10mm
HKM3.0*10mm
KA2.0*8mm
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Model assembly
Propeller and spinner installation
1. Assemble the propeller and spinner as shown below.
Note:The motor should rotate clockwise when viewing
the plane from the rear.
Float assembly installation
1. As shown in the image, connect both floats with the metal struts and secure the structure with the included
screws.
2. Connect the floats to the fuselage and secure with the included screws and retainer.
HKM3.0*10mm
HKM3.0*10mm
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Battery installation
1. Remove the battery hatch.
2. Remove the hook and loop tape from the fuselage.
Apply the looped surface to the battery.
3. Install the battery into the fuselage- securing it with
the preinstalled battery straps.
Note: The weight of each battery may vary due to
different manufacturing techniques. Move the battery
fore or aft to achieve the optimal center of gravity.
Receiver diagram
The cables from the servo connector board should be
connected to your receiver in the order shown. Note that the
LEDs can be powered by any spare channel on the receiver.
Tuck the wire leads into the recessed cavity towards the
rear of the battery hatch.
Spare
Flap
5
6
Spare
6
Flap
Preflight check
Important ESC and model information
1. The ESC included with the model has a safe start. If the motor battery is connected to the ESC and the throttle stick is not in
the low throttle or off position, the motor will not start until the throttle stick is moved to the low throttle or off position. Once the
throttle stick is moved to the low throttle or off position, the motor will emit a series of beeps. Several beeps with the same tune
means the ESC has detected the cells of the battery. The count of the beeps equals the cells of the battery. The motor is now
armed and will start when the throttle is moved.
2. The motor and ESC come pre-connected and the motor rotation should be correct. If for any reason the motor is rotating in
the wrong direction, simply reverse two of the three motor wires to change the direction of rotation.
3. The motor has an optional brake setting. The ESC comes with brake switched off and we recommend that the model be flown
with the brake off. However, the brake could be accidentally switched on if the motor battery is connected to the ESC while the
throttle stick is set at full throttle. To switch the brake off, move the throttle stick to full throttle and plug in the motor battery. The
motor will beep one time. Move the throttle stick to low throttle or the off position. The motor is ready to run and the brake will be
switched off.
4. Battery Selection and Installation. We recommend the 11.1V 1300mAh 25C Li-Po battery. If using another battery, the battery
must be at least a 11.1V 1300mAh 25C battery. Your battery should be approximately the same capacity, dimension and weight
as the 11.1V 1300mAh 25C Li-Po battery to fit the fuselage without changing the center of gravity significantly.
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Preflight check
transmitter and model setup
After assembly and prior to your first flight, make sure all control surfaces respond correctly to your transmitter by referring to the diagram below.
Control throws
The suggested control throw setting for the 1200mm Trekker are as follows (dual rate setting):
Tips: The maiden flight should always be flown
using low rates, fly the aircraft until you are familiar with its characteristics prior to trying high
rates. Make sure the aircraft is flying at a decent
altitude and speed prior to using high rates, as
the aircraft will be sensitive to control inputs with
the larger control surface movements.
Control horn and servo arm settings
1. The table shows the factory settings for the
control horns and servo arms. Fly the aircraft at the
factory settings before making changes.
2. After flying, you may choose to adjust the linkage
positions for the desired control response.
Elevator
Rudder
Aileron
ElevatorRudderAilerons
14mm up / down
18mm left / right
16mm up / down
Horns
Arms
10mm up / down
16mm left / right
12mm up / down
More control throw
Less control throw
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Finding the center of gravity
Finding the correct center of gravity is critical in ensuring that the aircraft
performs in a stable and responsive manner. Please adjust the weight
distribution so the aircraft balances in the range stated on the diagram.
• Depending on the capacity and weight of your choosen flight
batteries, move the battery forward or backward to adjust the
center of gravity.
• If you cannot obtain the recommended CG by moving the battery to a
suitable location, you can also install a counterweight to achieve correct
CG. However, with the recommended battery size, a counterweight is not
required. We recommend flying without unnecessary counterweight.
Before flying the model
50mm-60mm
Find a suitable flying site
Find a flying site clear of buildings, trees, power lines and other obstructions. Until you know how much area will be
required and have mastered flying your plane in confined spaces, choose a site which is at least the size of two to three
football fields - a flying field specifically for R/C planes is best. Never fly near people - especially children, who can
wander unpredictably.
Performing a range check
A radio range check should be performed prior to the first flight of the day. This test may assist you in detecting electronic
problems that may lead to a loss of control- problems such as low transmitter batteries, defective or damaged radio components or radio interference. This usually requires an assistant and should be done at the flying site.
Always turn your transmitter on first. Install a fully charged battery in the battery bay, then connect it to the ESC. In this
process, make sure that the throttle cut functionality is on, and that the throttle stick is secured in its lowest position- otherwise, the propeller/fan will engage and possibly cause bodily harm.
Note: Please refer to your transmitter manual that came with your radio control system to perform a ground
range check. If the controls are not working correctly or if anything seems wrong, do not fly the model until you
correct the problem. Make certain all the servo wires are securely connected to the receiver and the transmitter
batteries have a good connection.
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Before flying the model
Monitor your flight time
Monitor and limit your flight time using a timer (such as a stopwatch or on the transmitter, if available). As modern Lithium
Polymer batteries are not designed to discharge completely, when the battery runs low, the ESC will lower then completely
cut the power to the motors to protect the battery. Often (but not always) power can be briefly restored after the motor
cuts off by holding the throttle stick all the way down for a few seconds.To avoid an unexpected dead-stick landing on your
first flight,set your timer to a conservative 4 minutes. When your alarm sounds you should land right away.
Flying course
Take off
Point the aircraft into the wind while slowly applying power until the aircraft starts to track straight, use the rudder when
necessary. When the aircraft reaches takeoff speed, ease back on the elevator stick until the aircraft is climbing at a
constant rate without decelerating. Climbing at too steep of an angle at the relatively low speeds of a takeoff-climb may
result in an aerodynamic stall.
Flying
Always choose a wide-open space for flying your plane. It is ideal for you to fly at a sanctioned flying field. If you are not
flying at an approved site always avoid flying near houses, trees, wires and buildings. You should also be careful to avoid
flying in areas where there are many people, such as busy parks, schoolyards, or soccer fields. Consult laws and
ordinances before choosing a location to fly your aircraft. After takeoff, gain some altitude. Climb to a safe height before
trying technical manoeuvres.
Landing
Land the aircraft when you start to feel sluggish motor response. If using a transmitter with a timer, set the timer so you
have enough flight time to make several landing approaches.The model’s three point landing gear allows the model to land
on hard surfaces. Align model directly into the wind and fly down to the ground. Fly the airplane down to the ground using
1/4-1/3 throttle to keep enough energy for proper flare. Before the model touches down, always fully decrease the throttle
to avoid damaging the propeller or other components. The key to a great landing is to manage the power and elevator all
the way to the ground and set down lightly on the main landing gear. With some practice, you will be able to set the aircraft
gently on its main gear and hold it that way until the speed reduces enough where the nose wheel (tricycle landing gear
aircraft) or tail wheel (tail draggers) settles onto the ground.
Maintenance
Repairs to the foam should be made with foam safe adhesives such as hot glue, foam safe CA, and 5min epoxy. When
parts are not repairable, see the spare parts lst for ordering by item number.Always check to make sure all screws on the
aircraft are tightened. Pay special attention to make sure the spinner is firmly in place before every flight.
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Troubleshooting
ProblemPossible CauseSolution
Aircraft will not respond to
the throttle but responds to
other controls.
Excessive vibration or
propeller noise.
Reduced flight time or
aircraft underpowered.
Control surfaces
unresponsive or sluggish.
Controls reversed.
Motor loses power
Motor power pulses then
motor loses power.
ESC is not armed.
Throttle channel is reversed.
Damaged spinner, propeller,
motor or motor mount.
Loose propeller and spinner parts.
Propellor installed backwards.