Radiolink Electronic RL037T001A Users Manual
T7F-2.4GHZ
INSTRUCTION MANUAL
for RadioLink T7F-2.4GHz
7-channel,FHSS
for Airplanes/Helicopters
RadioLink corporation
Technical updates available at: http://www.radiolink.com.cn
2
TABLE OF CONTENTS
Introduction………………………………………................................................................................................………..…….….......….…3
Contents and specifications ………………………………………………….......................................................................................…3
Glossary…………………………………………………………............................................................................................……........……3
Introduction to the T7F-2.4GHz system………………………………………………………........................…......…..........….…4
Transmitter controls and descriptions …………………………………………………………........................…........…...…..….4
Radio installation……………………………………………………………………………………..........................………….….6
Receiver and servo connections……………………………………………………………………...................................….....…..8
LCD and Programming controls……………………………………………………………………...................................…...……9
Programming the T7F-2.4GHz radio ………………………………………………………………….......................................….11
MODL Model select function ……………………………………………………………………...........................………....….11
MODL Model select function ………………………………………………...………………..............................……..…….11
REST Data reset function………………………………………………………………….………...............................….….11
ACRO/HELI Model type select function………………………………………………….……………............................….12
Model name settings……………………………………………….…………………………………….......................12
REVR Servo reversing…………………………………………………………………………………….........................…12
D/R Dual Rate and Exponential settings ………………………………………………………...……….............................….13
D/R Dual Rate settings…………………………………………………………………………...................…….........13
EXPO Exponentials …………………………………………………………………………………..........................…13
EPA End Point Adjustments………………………………………………………………………………….................…..13
TRIM Trim Settings…………………………………………………………………………………………….................….14
(ACRO functions)
N-TH Normal Throttle Curve…………………………………………………………………………………......................15
PMX1 Programmable Mixer #1…………………………………………………………………………...................…..….15
PMX2 Programmable Mixer #2…………………………………………………………………………………..................15
FLPR Flaperon mixing……………………………………………………………………………………....................….....16
FLTR Flap trim……………………………………………………………………………………………………...................17
V-TL V-tail mixing……………………………………………………………………………………………….................….17
ELVN Elevon mixing…………………………………………………………………………………………........................18
AUX Auxiliary function………………………………………………………………………………..............................…19
(HELI functions)
N-TH Normal Throttle Curve………………………………………………………………………………….................…..20
N-PI Normal Pitch Curve…………………………………………………………………………………….................……20
I-TH Idle-Up Throttle Curve function……………………………………………………………………….................. …20
I-PI Idle-Up Pitch Curve function………………………………………………………………………….................... …..21
HOLD Throttle hold function………………………………………………………………………………...................… ...21
REVO Pitch - rudder mixing function ……………………………………………………………………....................… ..22
GYRO Gyro mixing function……………………………………………………………………………….................... ......22
SWSH Swashplate types selection & Swash AFR………………………………………………………......................…23
AUX Auxiliary function…………………………………………………………………………………...........................…24
Flow chart (ACRO)………………………………………………………………………………………….................…...…25
Flow chart (HELI)………………………………………………………………………………………….......................…............26
OtherT7F-2.4GHz functions……………………………………………………………………………….................................….27
Trainer function…………………………………………………………………………………………………................…27
Adjustable-height control sticks………………………………………………………………………………....................28
Changing the stick mode………………………………………………………………………...………….......................28
Flight preparation ………………………………………………………………………………………….............................…....28
Model Data Recording Sheets (ACRO)……………………………………………….………….....................................................29
Model Data Recording Sheets (HELI)………….................................................................................................................................................30
3
CONTENTS AND SPECIFICATIONS
Transmitter: T7F-2.4G Receiver: R7EH
T7F-2.4GHz Transmitter of FHSS system 7 channel receiver
Transmitting on 2.4GHz band Receiving on 2.4GHz band.
Operating system: 2-stick, 7-channel system Power requirement: 4.8V- 6V
Power supply:12V battery (8 pieces 5# batteries) Weight: 11g
Current drain: 80mA
Weight:560g (battery not included)
GLOSSARY
It will be helpful to understand the following terms before reading the rest of the manual. The terms are not in
alphabetical order, but are in a logical order that prepares the reader for understanding the next term.
Reversing (servo reversing) - A function that allows the user to determine the direction of response of each servo. If,
after hooking up the servos, a control on the model responds in the wrong direction, the user may change the servo's
direction so the control responds correctly.
Throw - When speaking of a control surface (such as an elevator or aileron), the throw
is the distance the surface moves. Control surface throw is usually measured at the
trailing edge of the surface and is expressed in inches or millimeters. The model in the
diagram has 1/2" [13mm] of up elevator throw. Throw can also refer to the distance a
servo arm (or wheel) travels.
Dual rate (D/R) - On the T7F-2.4GHz the dual rate switch allows you to instantly switch,
in flight, between two different control throws for the aileron, elevator and rudder. Often,
different control throws are required for different types of flying. (“Low” throws may be
required for flying at high speeds where the model's response becomes more sensitive,
and “high” throws may be required for aggressive aerobatic maneuvers or landing or
flying at lower speeds where the model's response becomes less sensitive.)
End point adjustment (E.P.A.) - Sets the overall, maximum distance the servo rotates in either direction. (No matter
where the dual rates are set, the servo will never travel beyond the limit set by the end point adjustment.)
Exponential - Normally, servos respond proportionally to control stick input from the transmitter (e.g., if the stick is
moved halfway, the servo will move halfway). However, with “exponential,” the servo can be made to move more or
less than initial stick movement (less servo movement is more common). Exponentials are commonly used to “soften,”
or decrease initial servo travel for the ailerons, elevators and rudder. This way, initial control stick inputs from the pilot
result in small servo movement for a smoother flying airplane.
(Dual rates adjust the amount of servo travel. Exponentials determine where most of the travel will occur.)
Mixing - Two (or more) servos can be made to operate together either by mechanically joining the wires (with a Y-
connector) or by electronically “joining” them through programming functions in the transmitter. When servos are
electronically joined via programming, they are said to be “mixed.” Unlike joining servos with a Y-connector, when
servos are mixed electronically they can be made to move in opposition. Additionally, each servo's end points can be
independently set.
Thank you for purchasing the RadioLink T7F-2.4GHz FHSS digital proportional R/C airplane/helicopter system. If this is
your first “computer” radio, rest assured that it is designed to make initial setup and field-tuning of your airplane/helicopter
easier and more accurate than using a “non-computer” radio. Although this is a beginner or sport system with the
requirements of those flyers in mind, in order to make the best use of your RadioLink T7F-2.4GHz and to operate it safely,
you must carefully read all of the instructions.
Suggestion: If, while reading the instructions, you are unclear of some of the procedures or functions and become “stuck,”
continue to read on anyway. Often, the function or procedure will be explained again later in a different way, providing
another perspective from which to understand it. Another suggestion is to connect the battery, switch and servos to the
receiver and actually operate the radio on your workbench as you make programming changes. Then, you'll be able to
see the effects of your programming inputs.
INTRODUCTION
4
INTRODUCTION TO THE T7F-2.4GHz SYSTEM
IMPORTANT!: Always turn on the transmitter first, then the receiver. When turning off the system, always turn off the
receiver first. The object is never to have the receiver on by itself. Otherwise, the servos or control surfaces could be
damaged, or in the case of electric-powered models, the motor may unexpectedly turn on causing severe injury.
Transmitter
ACRO mode: External switches operate dual rates (D/R), landing gear, and trainer cord or “buddy-box” capabilities.
Programming features include servo reversing and E.P.A on all channels, dual rates, exponentials and programmable
mixing. Additionally, any one of four, factory-set, preprogrammed “wing-type” mixers including flaperon, and V-tail,
elevon mixing may be selected.
HELI mode: Dual rate (D/R), Idle up, Throttle hold, and Gyro sense can be operated by switch. Two different gyro
senses can be set with RadioLink GY100 Gyro on gyro function of this transmitter. Programming features include
servo reversing and E.P.A on all channels, dual rates, exponentials, throttle curve, pitch curve, throttle hold, and pit to
rudder mixing(REVO). Additionally, any one of two, factory-set, preprogrammed “swashplate type” mixers, including
three servo type 3-S, may be selected.
Transmitter controls
The diagram and explanations briefly describe the functions of the RadioLink T7F-2.4GHz transmitter. Full instructions
on how to operate the controls are provided beginning on page 11.
Mode 1:Throttle on the right. Mode 2:Throttle on the left. (More on flight modes on page 28)
DESCRIPTIONS:
Aileron, Elevator and Rudder dual rate switch
Use this switch to “flip” between two aileron, elevator and rudder control throw settings. The throws can be set up
however you prefer, but generally, when the switch is “up” the throws are greater (“high rate”) and when the switch is
“down” the throws are less (“low rate”). This switch also flips between exponential rates (if used).
A:Flap switch/Channel 6 - This switch operates the servo connected to channel 6 in the receiver. If your model has
flaps, this is the control used to operate them.
Antenna Liquid-crystal display screen(LCD)
Carrying handle
A:Gear switch(CH.5)
H:Gyro switch(CH.5)
Traner switch
Idle-up switch
Throttle trim lever(Mode 2)
Elevator trim switc(Mode 1)
Throttle/rudder control
stick(Mode 2)
Elevator/rudder control
stick(Mode 1)
Rudder trim lever
MODE “▲” key
DATA “+” key
CH.7Auxiliary channel
Aileron
Elevator&Rudder dual
rate switch
A:Flap switch(CH.6)
H:Throttle hold switch
Power indicator LED
Elevator trim lever
(Mode 2)
Throttle trim lever
(Mode 1)
Elevator/aileron
control stick(Mode 2 )
Throttle/aileron control
stick(Mode 1)
Neck strap hook
Aileron trim lever
SELECT key
POWER switch
MODE “▼” key
DATA “-” key
5
Trim levers (all) - Used to shift the neutral or center position of each servo as labeled in the diagram. Once either trim
lever is operated, the trim position is displayed on the LCD screen. Also once either edit key is operated, all trim
positions are displayed sequentially on the LCD screen.
NOTE: The throttle trim lever is intended for fine tuning the throttle servo when the engine is at idle. Throttle trim does
not affect the throttle servo when the throttle control stick is all the way up (so idle r.p.m. can be adjusted without
affecting throttle settings through the rest of the stick movement).
Charging jack - Port for charging the transmitter batteries.
POWER switch-power on/power off
DATA “+” or “-” key - Used to change the values of the various functions displayed on the LCD screen
Liquid - crystal display screen (LCD) - Displays programming modes and values entered.
MODE “▲”or“▼” key - Used to scroll through and display the different functions.
Press MODE “▲” key to scroll to previous function menu.
Press MODE “▼” key to scroll to next function menu
SELECT key - Used to scroll the sub-menu for the current function.
Throttle/rudder control stick - Operates the servos connected to channel 3 (throttle) and channel 4 (rudder) in the
receiver.
Trainer switch - Operates the trainer functions. To operate as a trainer switch the transmitter must be connected to
another transmitter via. a trainer cord (available separately).
Idle - up switch - This switch operates to change the fight condition which sets the throttle curve and pitch curve of
mid air maneuvers (rolls, loops, stall turns) and 3D flight.
A:Retractable landing gear switch/Channel 5 - Switch operates the servo connected to channel 5 in the receiver. If
your model has retractable landing gear, this is the control used to extend and retract the gear.
H:Gyro switch/Channel 5 - You can connect the sense adjust connector to channel 5 of the receiver to operate the
gyro, which has two different senses. Also if you use the RadioLink GY100 Gyro, two different gyro sense settings on
the gyro function in this transmitter can be called by this switch.
Antenna - Radiates signals to the receiver. NEVER point at the model when flying!
H:Throttle - hold switch - This switch operates to hold the engine in the idling position and disengage it from the
Throttle Stick. It is commonly use to practice auto-rotation.
Neck strap hook - Mounting point for optional neck strap.
Aileron/elevator control stick - Operates the servos connected to channel 1 (aileron) and channel 2 (elevator) in the
receiver.
Servo
6
RADIO INSTALLATION
Follow these guidelines to properly mount the servos, receiver and battery
Make certain the alignment tab on the battery, switch and servo connectors is oriented correctly and “keys” into the
corresponding notch in the receiver or connectors before plugging them in. When unplugging connectors, never pull
on the wires. Always pull on the plastic connector instead.
If any servo wires are not long enough to reach the receiver, servo extension wires (available separately) may be
used.
Always mount the servos with the supplied rubber grommets. Do not over
tighten the screws. No part of the servo casing should contact the mounting
rails, servo tray or any other part of the airplane/helicopter structure. Otherwise,
vibration will be transmitted to the servo causing premature wear and/or servo
failure.
Note the small numbers (1, 2, 3, 4) molded into each arm on the 4-arm servo arms. The
numbers indicate how many degrees each arm is “off” from 90 degrees to correct for minute
manufacturing deviations from servo to servo.
To center the servos, connect them to the receiver and turn on the transmitter
and receiver. Center the trims on the transmitter, then find the arm that will be
perpendicular to the pushrod when placed on the servo.
After the servos are installed, operate each servo over its full travel and check that the pushrods and servo arms do not
bind or contact each other. Also make sure the controls do not require excess force to operate. If there is an
objectionable buzzing sound coming from a servo, there is probably too much resistance in the control. Find and correct
the problem. Even if there is no servo damage, excess battery drain will result.
To prevent the servo lead wires from being broken by vibration during
flight, provide a margin so that the wire sticks out slightly and fasten it at
suitablepoints. In addition, periodically check the wire during daily
maintenance
Fasten about
5-10cm from the
servo outlet so that
the lead wire is neat.
Margin in the lead wire.
Rubber
grommet
Servo
Rubber
grommet
Signal
7
7
Transmitter Antenna
1. The transmitter antenna is adjustable so please make sure that the antenna is never pointed directly at the model when
flying as this creates a weak signal for the receiver.
2. Keep the antenna perpendicular to the transmitter's face to create a better RF condition for the receiver. Of course this
depends on how you hold the transmitter, but in most cases, adjusting the transmitter antenna so that it is perpendicular
to the face will give the best results. Please adjust the transmitter antenna to the way you hold the transmitter.
3. NEVER grip the antenna when flying as this degrades RF quality.
Link Procedure
Each transmitter has an individually assigned, unique ID code. In order to start operation, the receiver must be linked with
the ID code of the transmitter with which it is being paired. Once the link is made, the ID code is stored in the receiver and
no further linking is necessary unless the receiver is to be used with another transmitter. When you purchased another
R7EH, this procedure is necessary; otherwise the receiver will not work.
1. Place the transmitter and the receiver close to each other within one (1) meter
2. Turn on the transmitter.
3. Connect the 5V power line of ESC to the 3rd channel of receiver.
4. Press down the "ID SET" switch for more than one second, and release the switch. The receiver starts the linking
operation. The LED of receiver blinks 12 times,then always green on signifies the success of linking.
5. Please confirm that the servos will now operate by your transmitter.
Receiver's Antenna Installation:
To obtain the best results of function, please refer to the following instructions;
1. The antenna must be kept as straight as possible. Otherwise it will reduce the effective range.
2. Larger models can have large metal objects that can attenuate the RF signal. In this case the antenna should be placed
at both sides of the model. Then the best RF signal condition is obtained at any flying attitude.
3. The antenna must be kept away from conductive materials, such as metal and carbon by at least a half inch. The
coaxial part of the antenna does not need to follow these guidelines, but do not bend it in a small radius.
4. Keep the antenna away from the motor, ESC, and other noise sources as much as possible.
The receiver contains precision electronic parts. It is the most delicate radio component on-board the model and should be
protected from vibration, shock and temperature extremes. To protect the receiver, wrap it in R/C foam rubber or other
vibration-absorbing material. If appropriate, waterproof the receiver by placing it in a plastic bag and closing the open end
with a rubber band before wrapping it in foam. If moisture enters the receiver, intermittent operation or a failure may result.
Wrapping the receiver in a plastic bag also protects it from fuel and exhaust residue which, in some models, can work its
way into the fuselage.
Top
Key for linking
Positive
+
Antenna
Negative
1
FHSS
2
3
4
5
6
7
Bottom
Antenna
R7EH
7Channel Receiver
ID SET
Receiver
8
The diagram shown is for aircraft models only. Additional servos may have to be purchased separately
The diagram shown is for helicopter models only. It is necessary to buy an additional gyro separately
RECEIVER AND SERVO CONNECTIONS
Connect the servos to the receiver to perform the functions indicated:
Function
Aileron-or-right flaperon-or-right eleven(for
tailless models)
Output
Channel
Aircraft(ACRO) Helicopter(HELI)
1
2
Elevator-or-left ruddervator(for V-Tail models)
–or-left elevon( for tailless models)
Aileron
Elevator
3 Throttle Throttle
4 Rudder-or-right ruddervator(for V-Tail models) Rudder
5 Retractable landing gear Gyro sensitivity
6 Flap-or-left flapron Pitch
7 Auxiliary Auxiliary
A ileron Servo
(CH1)
Elevator Ser
vo
(CH2)
Throttle Servo
(CH3)
Rudder Servo
(CH4)
Gear Servo
(CH5)
(CH6)
Flaperon Mode (Dual Aileron
R7EH
7Channel Receiver
ID SET
1
2
3
4
5
FHSS
6
7
(CH2)
(CH4)
Servo, CH1 & 6)
(CH1)
(CH1)
(CH6)
(CH2)
(CH4)
Independent Aileron & Flap
Flap Servo
(CH6)
AUX
(CH7)
R7EH
7Channel Receiver
ID SET
1
2
3
4
5
FHSS
6
7
A ileron Servo
(CH1)
Elevator Servo
(CH2)
Throttle Servo
(CH3)
P itch Servo
(CH6)
AUX
(CH7)
Rudder Servo
Optional
Gyro
System
Gyro Sensitivity (CH5)
Rudder (CH4)
7-Channel Radio Control System
9
When the transmitter is initially turned on, the model type, model
memory name, and transmitter battery voltage are displayed on the LCD
screen. When prompted by the user, the functions
and settings stored in the memory can also be read on the screen. The
user accesses the different functions using the MODE“▲”or“▼” key
and changes the values and settings using the DATA “+” or “-” key.
(This is called programming!)
Note: Feel free to explore by scrolling through the programs and viewing the displays using the MODE“▲”or“▼” key. The
MODE“▲”or“▼” key only determine what will be displayed on the screen and will not change any of the settings. Only when
using the DATA “+” or “-” key will you be able to change any of the settings.
Model name
The RadioLink T7F-2.4GHz stores model memories for six models. This means all the data (control throws, trims, end
points, etc.) for up to six different models can be stored in the transmitter and activated at any time (depending upon which
model you choose to fly that day). This eliminates the requirement for reconfiguring the transmitter each time you decide to
fly a different model with it! When the transmitter is turned on the model type, model name, and the transmitter voltage will be
indicated on the LCD screen. Before every flight BE CERTAIN that the correct model name for the model you intend to fly
appears on the screen. If the transmitter is not operating the correct model, some (or all) of the controls could be reversed
and the travels and trims will be wrong.
Flying a model with the wrong program will result in a crash, so always be certain the model name in the transmitter is
correct. One way to ensure this is to write the corresponding model name directly on the airplane or helicopter, or attach a
list to the bottom or back of the transmitter.
LIQUID CHIP DISPLAY (LCD) & PROGRAMMING CONTROLS
Press MODE “▲” key to scroll to previous function menu
Press MODE “▼” key to scroll to next function menu
LCD display screen
Current model
memory name
Transmitter
Battery voltage
Current model
type
MODE “▲”or“▼” key - Used to scroll through
and display the different functions.
SELECT key - Used to scroll the sub-menu
for the current function.
DATA “+” or “-” key - Used to change the values of the
various functions displayed on the LCD screen
POWER switch
To open programming menu:
Press MODE“▲”and “▼” keys simultaneously and hold for one second
Battery
10
Transmitter battery voltage
In addition to the model type, the LCD screen also displays the transmitter battery voltage.
When the voltage goes below approximately 8.5 Volts the “battery” icon will flash and the
lowbattery alarm will continuously beep until the transmitter is turned off. When the lowbattery alarm sounds, land immediately your model before losing control.
Note: If the transmitter ever reaches 8.9 Volts, land as soon SUGGESTED GUIDELINES
as safely possible. A more reasonable margin of safety would 9.4 Volts - No more flying until recharge.
be to quit flying for the day (or recharge the batteries) when 8.9 Volts - Land as soon as safely possible.
the transmitter battery reaches 9.4 Volts. 8.5 Volts - Emergency- Land immediately!
Mixer alert warning (HELI only)
If the transmitter is turned on with the throttle hold or idle up function switched on, the screen
will show "MIX" and a warning will sound. Please turn the throttle hold and idle up functions
off to precede.
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