Hobbico TTX403 Users Manual

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TACJ2403

2.4GHz 4-Channel Micro Spread Spectrum Radio
Instruction Manual

The Tactic™ TTX403 Micro airplane radio system uses an advanced 2.4GHz spread

spectrum technology to prevent unwanted outside interference from interrupting
control of the model, ensuring error-free fl ying and eliminating the need to pull
frequency pins before every fl ight. Tactic 2.4GHz transmitters and receivers are not
compatible with other brand 2.4GHz equipment.

For safe operation and best results, it’s strongly recommended to
read t his manual in its entir ety before use! Also read and und erstand
the instructions included with the model. Damage resulting from
misuse or modifi cation will void your warranty.

FEATURES

● 2.4GHz frequency hopping spread

spectrum technology

● Tx can link to Tactic SLT 2.4GHz

receivers

● Digital trims with power status LED

● Built-in charger for 1S micro LiPo

batteries

● V-Tail Mixing

● Elevon Mixing

● Channel Remapping

TTX403 TRANSMITTER (Tx)

The TTX403 4-Channel Micro airplane transmitter can be confi gured to operate

as a 3-channel or 4-channel Tx. When confi gured for 4-channel operation the
controls function like a normal Mode-2 transmitter with aileron + elevator on the

right stick, and throttle + rudder on the left stick.

Confi guring the Tx for 3-channel operation can help beginners concentrate on

throttle control with one hand and full airplane directional control with the other hand.

Here, the right stick operates elevator + rudder while the left stick will control the

throttle. The aileron function will still be active, and now be on the left stick, but aileron
control is often not needed for 3ch aircraft.

To change the TTX403 transmitter between 3ch and 4ch confi gurations:

1. Turn off the Tx power switch.

2. Move the right stick to the top­right corner, and the left stick to
the top-left corner, and hold in
these positions.

3. Move the Tx power switch to the
on position. The power LED will
fl ash, accompanied by three
short tones from the Tx which
indicates the Tx confi guration
has been changed.

NOTE: Each time the Tx power switch is turned on you will hear either one
short tone if the Tx is in the 3ch configuration, or two short tones if the Tx is
in the 4ch configuration.

Input Power

Five “AA” batteries are required to power the Tx (not included with individual radio

systems). Non-rechargeable 1.5V alkaline, or 1.2V rechargeable nickel-cadmium

(NiCd) or nickel-metal hydride (NiMH) cells can be used. Do not mix cell types, old

and new cells, etc. See the SERVOS AND ACCESSORIES section on page 12 for
optional products available at local hobby retailers.

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Slide the battery door down,
and insert the cells as shown.
Make sure to note proper
polarity for each cell. Close the
battery door.

Power LED and Low Battery Alarm

The red power LED should light when the power switch is moved upwards to the

on position. The Tx should have adequate power for fl ight when the LED is on
constantly. Anytime the LED begins to fl ash, accompanied by an audible tone, the

Tx battery voltage has dropped too low and operation of the model should NOT

be attempted!

WARNING! Never operate an R/C model with weak Tx batteries!
Reduced operational range and/or possible loss of control of the
aircraft could result. Replace weak alkaline batteries, or recharge
NiCd or NiMH batteries before attempting a fl ight!

If during a fl ight audible tones sound and the Tx LED starts to fl ash the Tx batteries

have become weak and the aircraft should be landed as soon as possible!

Aileron (Ch 1)

Controls the moveable surfaces at the trailing edge of the main wings to rotate the

airplane about the “roll” axis (an imaginary line which extends from the airplane’s
nose to the tail). Since every airplane is different, the direction of movement for
the aileron channel may need to be reversed so that moving the aileron stick to
the right will cause the airplane’s right aileron to defl ect up, thus causing the right

wing to drop and the airplane will bank to the right. Moving the aileron stick to the

left will cause the airplane’s left wing to drop and the airplane will bank to the left.

This is one important method for turning the aircraft. When the Tx is set to the 3ch

confi guration the aileron channel will not be used.

Elevator (Ch 2)

Controls the moveable horizontal surfaces on the airplane’s tail to rotate the airplane

about the “pitch” axis (an imaginary line extending through the center of both main
wings, from one wing tip to the other wing tip). The direction of movement for the
elevator channel may need to be reversed so that pulling the elevator stick back
(towards you) will cause the elevator to defl ect up, thus causing the nose of the

3

airplane to rise. Pushing the elevator stick forwards (away from you) will cause the

nose of the airplane to drop.

Throttle (Ch 3)

Controls the speed (R.P.M.) at which the motor operates. Pulling the throttle stick

back will cause the motor’s speed to decrease. Pushing the throttle stick forward
will cause the motor’s speed to increase.

Rudder (Ch 4)

Controls the side-to-side movement of the airplane’s tail and will rotate the airplane

about the “yaw axis” (an imaginary line from the top of the airplane’s fuselage to the

bottom of the fuselage, located near the center-point of the fuselage). The direction

of movement for the rudder channel may need to be reversed so that moving the
rudder stick to the right causes the rudder to defl ect to the right, thus causing the

nose of the airplane to point to the right. Moving the rudder stick to the left will cause

the nose of the airplane to turn left. When the Tx is set to the 3ch confi guration the
rudder will be controlled by the right stick. Otherwise, rudder is controlled with the

left stick.

Trims

All trims are digital in function. Two trim buttons are included for each of the main

controls, located adjacent to the respective stick. One trim button adjusts the

servo’s direction in one direction, and the other button to the opposite direction.
Briefl y pressing any trim button will adjust the center position of the respective

servo output in the appropriate direction and will be accompanied by an audible

tone. Pressing and holding any trim button will cause the servo output to move
repeatedly. A unique tone will sound when the servo reaches either end of the trim

limit, and at the channel’s center point.

During a fl ight, when the main sticks are released and spring back to center position

the aircraft should ideally not veer in any direction. If the aircraft does veer in a

particular direction, press the respective trim button until the aircraft maintains a

straight attitude on its own.

Reversing Channel Direction

The direction of movement for any of the four channels can be reversed electronically.

To change the direction of movement for any channel:

1. Switch off the Tx power switch.

2. Press and hold either trim button for the channel to be reversed.

3. Switch the Tx power switch on. The LED should fl ash to indicate the

movement for that channel has been reversed.

4. Repeat steps 1-3 to reverse the direction of any other channel as needed.

5. Switch the Tx power switch off.

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Elevon & V-Tail Mixing Functions

The TTX403 includes elevon and V-tail mixing functions, which can be turned on or

off. “Elevon” control consists of a mixture between the elevator and aileron channels,

and is useful for certain types of aircraft (such as a fl ying wing). “V-tail” control

consists of a mixture between the elevator and rudder channels and is useful for

aircraft which have a V-tail. The default setting for all mixing will be “off”. To change

the mix setting:

1. With the Tx power switch off, move
the right stick to the bottom-right
corner, and the left stick to the bottom­left corner.

2. While holding the sticks in
these positions, turn the Tx power
switch ON.

3. The transmitter will emit three rapid
tones to confirm the programming
has been changed. The LED will
then flash once simultaneously with
one (3ch config) or two tones (4ch

config) during powerup. This single flash indicates that the transmitter is in

V-Tail mixing and the LED will remain solid afterwards.

ch2 ch4 ch2 ch4 ch2 ch4

V-Tail Mixing

Left Rudder

Right Rudder Up Elevator

4. To cancel V-tail mixing and activate elevon mixing, turn off the transmitter and
repeat the above procedure. When the LED fl ashes twice during powerup the
elevon mix is enabled and the LED will remain solid afterwards.

Aileron
Function

Elevon Mixing

Elevator Function

5. To cancel all mixes, repeat this procedure again. When the LED remains solid, all
mixes will be off.

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Each time the mix setting is changed, be sure to check that all controls move in

the proper direction for the model. It may be necessary to change the setting of
the aileron, elevator, or rudder reversing on page 4 to achieve the proper throw
directions for the model. If the elevator and aileron functions or the rudder and

elevator functions appear reversed at the control surfaces, it may be necessary to

swap the channel 1 and 2 servo plug positions for the elevon mix or the channel 2
and 4 servo plug positions for the V-tail mix.

Electronic Speed Control (ESC)

If the model is electric powered, an optional ESC will be necessary to control speed

of the electric motor and to divert power to the receiver and servos. Connect the

receiver plug on the ESC to the slot marked CH3 (throttle) on the receiver. Center

the transmitter’s throttle trim and follow the ESC instructions for proper operation
and connection of the power battery.

Glow Engines

If the model is powered by a glow engine, a switch harness and 4-cell battery
(4.8V) will be necessary to power the receiver and servos. See the SERVOS AND
ACCESSORIES section for suggested options.

Built-In 1S LiPo Charger

A 1S LiPo charger is built into the TTX403 transmitter itself. This charger is designed

specifi cally for charging a micro 1S 3.7V LiPo cell which has a micro connector.

Charge current is rated at 250mAh, with a maximum charge voltage of 4.20V.
Charging will begin automatically when the battery is connected, and automatically

stop when full charge is detected.

1. Make sure the Tx power
switch is in the off position.

Looking at the rear of the Tx,

2.
slide open the charger door

by moving it to the right.

3. Connect the 1S LiPo battery
to the socket inside the
battery door. When a proper
connection has been made
and the battery is being
charged, the green “CHARGE”
LED will illuminate.

4. When charge is complete
the green CHARGE LED will
turn off.

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