Hobbico TTX402 Users Manual

™

TACJ2402 v1.0

2.4GHz 4-Channel Spread Spectrum Radio

INSTRUCTION MANUAL

The Tactic TTX402 Micro airplane radio system uses an advanced 2.4GHz spread
spectrum technology to prevent outside interference from interrupting control of
your model, ensuring error-free fl ying and eliminating the need to obtain frequency
pins before ev ery fl ight. Tactic 2.4GHz transmitters and receivers are not compatible
with other brands of 2.4GHz equipment.

For safe operation and best results, it’s strongly recommended
you read this manual in its entirety before use! Also read and
understand the instructions included with the model. Damage
resulting from misuse or modifi cation will void your warranty.

FEATURES

Antenna

LED Power

LED Charge

Indicator

Power

Switch

●

2.4GHz frequency hopping spread spectrum technology

● Built-in charger for airborne 1S micro LiPo batteries ● Power status LED

● Transmitter can bind to multiple Tactic 2.4GHz receivers

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● Digital trims on all four channels

Indicator

Trim
Buttons

TTX402 TRANSMITTER (Tx

)

The TTX402 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 ele vator + 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. See the diagram above for
details.

To change the TTX402 transmitter between 3ch and 4ch confi gurations:

1. Turn off the Tx power switch.

2. Move the right stick to the top-right 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 that each time the Tx pow er switch is turned on you will hear either one short
tone if the Tx is in the 3ch confi guration, or two short tones if the Tx is in the 4ch
confi guration.

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INPUT POWER

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

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

POWER LED, and LOW BATTERY ALARM

The 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 re-charge
NiCd or NiMH batteries before attempting a fl ight!

If during a fl ight audible tones sound and the power LED starts to fl ash the Tx
batteries have become weak and the aircraft should be landed as soon as possib le!

AILERON (CH1)

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 (CH2)

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 mo vement f or the elev ator
channel may need to be rev ersed so that pulling the elev ator stick back (tow ards you) will
cause the elevator to defl ect up, thus causing the nose of the airplane to rise. Pushing
the elevator stick forward (a way from you) will cause the nose of the airplane to drop.

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THROTTLE (CH3)

Controls the speed (R.P.M.) at which the motor operates. Pushing the throttle stick
forward will cause the motor’s speed to increase. Pulling the throttle stick back will
cause the motor’s speed to decrease. Always place the throttle stick at the low
position before switching on the transmitter.

RUDDER (CH4)

Controls the side-to-side movement of the airplane’s tail and will rotate the airplane
about the “ya w 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 f or 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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BUILT-IN 1S LIPO CHARGER

A 1S LiPo charger is b uilt into the TTX402 tr ansmitter itself. This charger is designed
specifi cally for charging a micro 1S 3.7V LiPo cell ha ving 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. It is not recommended to charge a 1S LiPo while fl ying.

1S LiPo Battery

ttery

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

2. Looking at the rear of the Tx, slide open the charger door b y moving it to the right.

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

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

.IMPORTANT WARNINGS REGARDING LIPO BATTERY USE!!

NEVER A TTEMPT TO CARE FOR LITHIUM-POLYMER (LiPo) CELLS
IN THE SAME WAY AS OTHER BATTERY TYPES! LiPo cells are much

more sensitive and volatile than NiCd or NiMH batteries. Misuse and

overcharge can quickly result in LiPo cells getting hot and/or swelling,
which could lead to VIOLENT EXPLOSION AND/OR FIRE and serious personal
injury and property damage.

● NEVER attempt to recharge other batter y types except 1S LiPo cells with this

built-in charger.

● NEVER continue to charge or use LiPo cells if they start to swell or become

overly warm to the touch. Failure to follow this guideline could cause the battery
to become hot and explode or ignite!!

● ALWAYS disconnect the battery from the charger immediately if the battery

becomes hot! Allow the battery to cool before use.

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