FeiYu Tech FY-41AP Lite Installation & Operation Manual

FY-41AP Lite AutoPilot & OSD System

Installation & Operation Manual

Guilin Feiyu Technology Incorporated Company

Addr : 3rd Floor,B,Guilin Electric Valley ,Innovation Building,

Information Industry Park,Chao Yang Road,

Qi Xing District,Guilin 541004,China

Website: www.feiyu-tech.com

Guilin Feiyu Technology Incorporated Company.

http://www.feiyu-tech.com [e-mail]

Table Of Content

User Agreement ............................................................................................................................................................ 1

1. FY-41AP Lite AutoPilot System Introduction .................................................................................................. 2

2. Function Introduction .......................................................................................................................................... 3

2.1 FY-41AP Lite Single Module Function .................................................................................................. 3

2.2 FY-41AP Lite With GPS Function ............................................................................................................ 4

2.3 OSD Video Overlay System Function ................................................................................................... 5

2.4 FY-41AP Lite Can Be Connected To A Data Link .............................................................................. 5

3. FY-41AP Lite Configuration ............................................................................................................................... 5

4. FY-41AP Lite Connection Summary ................................................................................................................ 7

5. S1~S8 Servo Interface Connection Instructions ........................................................................................ 8

6. Connection Introduction .................................................................................................................................... 8

7. Main Module Installation ................................................................................................................................ 10

7.1 FY-41AP Lite Module Installation ....................................................................................................... 10

7.2 GPS Module Install ................................................................................................................................... 11

7.3 Power Manager Module Install ........................................................................................................... 11

7.4 Airspeed Sensor Module Install .......................................................................................................... 11

7.5 Remote Control Setting: SW1&SW2.................................................................................................. 12

7.6 Gyroscope Reset ....................................................................................................................................... 12

7.7 FY-41AP Lite Indicator Light Instruction .......................................................................................... 13

7.8. OSD Interface Instruction ..................................................................................................................... 14

8. FY-41AP Lite Setting.......................................................................................................................................... 15

9. FY-41AP Lite First Flight Test Checklist .......................................................................................................... 27

10. Other Functions And Settings ..................................................................................................................... 29

10.1 Switch ( SW2 ) Function Setting ................................................................................................... 29

10.2 RC Max Distance Setting ................................................................................................................. 29

10.3 Circling Radius Setting ..................................................................................................................... 30

10.4 The Altitude Of Return To Launch Instructions ....................................................................... 30

10.5 FAIL-SAFE Setting .............................................................................................................................. 31

10.6 Fixed Altitude & Heading Lock Mode Instruction ................................................................. 31

10.7 3D Mode Instruction ........................................................................................................................ 32

10.8 Auto Circling Mode Instruction .................................................................................................... 32

10.9 Link Mode (RC Receiver Control Mode/Data Radio Control Mode) ............................... 32

Appendix ...................................................................................................................................................................... 33

Appendix : Flight Area Map Making ..................................................................................................... 33

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Page 1

Dear Customer :

Thank you for choosing FY-41AP Lite as your autopilot system. Please read this

manual carefully to ensure correct installation & operation.

User Agreement

The use of FY-41AP Lite is prohibited for any illegal intentions and purposes. The
user will be fully responsible for the use of this product and FY-Tech will not be held liable
it's misuse either in its original or altered state by the customer (including the direct,
indirect, or third party losses caused by a faulty plane or plane crash).

Please read this manual carefully before using this product. If you have any questions,
do freely contact us and we will attempt to provide you with a satisfactory clarification

and/or resolution should it be required. The products’ functions maybe changed only by

firmware upgrades which is available from our website from time-to-time. Please do check
our website for available firmware upgrades. The company reserves the right to alter the
contents of the product firmware.

This agreement takes immediate effect upon the purchase of the product.

Attention

 The installation and use of this device require some skill and knowledge in flying
remote controlled aircraft.
 If you are a complete beginner & have never flown one before, we do not recommend
you install this device on your own. Please find an experienced RC pilot who may provide
you with the basic knowledge required to use this device successfully.
 If you are already an experienced flyer, you will find the FY-41AP Lite installation to be
easy & logical. Follow this manual & you won’t go wrong.
 If you need further technical support, contact us at: [e-mail]

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1. FY-41AP Lite AutoPilot System Introduction

FY-41AP Lite Module

FY-41AP Lite is an inertial attitude measurement instrument used for FPV flight on
fixed-wing aircrafts. It has an integrated OSD video overlay system that presents critical
flight information such as power management, airspeed, altitude, and flight direction via its
sensors and GPS module, allowing for a clear visual flight while ensuring key information
is within sight.

The new FY-41AP Lite with its enhanced altitude control and GPS module, can now
realize improved pinpoint inertial navigation and automatic piloting.

Flight stabilization is achieved via an integrated 3 axis gyro, 3 axis accelerometer,
and a barometric pressure sensor. This enables the module to accurately measure flight
attitude, earth azimuth & relative altitude to achieve:

 Extremely stable conventional flight pattern

 Stabilized 3D flight

 Automatically return to home (RTL)

 Fixed altitude flight

 Heading lock flight

 Auto circling over a fixed GPS location.

GPS Module

GPS module enables the FY-41AP Lite to calculate the flight course & sense the
exact location of the aircraft. GPS data allows aircraft return to home (RTL), auto circle,
and control straight line navigation.

Airspeed Module

The FY-41AP Lite can be connect to the airspeed sensor (When don’t connect the
airspeed sensor, the FY-41AP Lite also can work normally).The airspeed sensor can
measure the airspeed of the aircraft. Compared to the GPS speed the airspeed have the
characteristics which is small delay and small affected by the wind. This characteristics
can achieve the effective control of the throttle, improve the efficiency of flight and flight
safety

OSD System

FY-41AP Lite has integrated OSD hardware with optimizing display interface. Critical
flight parameters are displayed like altitude, speed, direction, flying voltage and amp draw,
and most display parameter outlay can be changed via RC control.

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Power Manager Module

FY-41AP Lite can connect power manager module which is integrated with current
sensor module and Voltage-Regulating module. Current Sensor is used to check voltage,
Amp draw. The integrated Voltage-Regulating module provides stable +12V to FPV video
camera and video transmitter.

Altitude Control

Altitude control is achieved using a high sensitivity barometric sensor which
measures relative height. Altitude is fixed via elevator servo control and throttle
management.

Heading Control

Under the condition of without GPS module, heading control is achieved by the
inertial device. Both the aileron & rudder servo is used to control flight heading. But it will t
influence of wind deviation from the original route.

Under the condition of connect to the GPS module, GPS data is used to automatically
correct heading even in windy conditions.

Speed Control

Under the condition of without airspeed sensor but connect to the GPS module, GPS

module provide the speed and altitude information for the throttle control to achieve the
control of the speed.

When connect to the airspeed sensor, the airspeed information will available and use
for controlling the throttle, and the speed control is more reliable and accurate.

2. Function Introduction

2.1 FY-41AP Lite Single Module Function

Note: Not use the GPS module

● Activated Mode In this mode, the FY-41AP Lite auto stabilization is turned off.

The aircraft is completely under pilot control.

● Stabilized Mode Level flight is automatically maintained, making flight simple,

especially for beginners. If a pilot feels the plane is out of control, simply reduce input
control and the plane will automatically recover level flight.

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● 3D Mode If no input is given by the pilot (all sticks in the middle position), 3D

mode will lock the current aircraft attitude. Therefore the aircraft can be easily
maneuvered to complete a variety of 3D flight with added stability & smoothness.

● Fixed altitude & Heading lock Mode This mode maintains aircraft flight course

& holds the altitude on activation.The system automatically corrects flight course deviation
& maintains straight-line flight.

● Auto Circling Mode On activation, the plane will maintain altitude and flight speed,

while initiating a counterclockwise circle, but this is not hovering around a fixed point, is
likely to be blown away from the original place of circle.

2.2 FY-41AP Lite With GPS Function

● Fixed altitude & Heading lock Mode This mode maintains aircraft flight course

& holds the altitude on activation. By using GPS data, the system automatically corrects
flight course deviation & maintains straight-line flight.

● Auto Return To Launch Mode (RTL) Upon activation of this Mode, the aircraft

will automatically return to the Home point, maintaining is current altitude. Upon reaching
the Home point, it will initiate auto circling.

After the aircraft back to the target point ,if the altitude greater than 100 meters , the
aircraft will down to 100 meters while circling. For the FY-41AP Lite , there is 50 meters
protection altitude for return home .If the altitude below 50 meters when activate into RTL,
the aircraft will climb to 50 meters while return.

● Auto Circling Mode On activation, the plane will maintain altitude and flight speed,

while initiating a clockwise circle. The centre of the circle is the point of activation at a
default radius of 80 meters (can be changed via FY GCS).

● GCS software By using a field computer and connecting the FY41AP Lite to an

FY Data Radio via the UART port, you can set the FY41AP Lite flight parameters, monitor
the flight progress & record / reply the flight via the FYGCS software. For more information,
please refer to the FY Data Radio manual.

NOTE:

1 ) In the navigation mode, the remote control lever (AIL ,ELE,THR,RUD) no longer can

control the aircraft except Fixed altitude & Heading lock Mode.

2 ) In Fixed altitude & Heading lock Mode, operation the throttle lever is invalid, in this

mode operation AIL,ELE,RUD lever are effective.

3) In the navigation mode, when the flight altitude below a certain altitude, the flight
speed below a certain speed, the throttle will automatically shut down.

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2.3 OSD Video Overlay System Function

First Person View (FPV) FY-41AP Lite has an integrated OSD video overlay

system that presents critical flight information on the video for easy enjoy FPV, at the
same time, Auto stable, Fixed altitude & Heading lock, Auto Return To Home function will
make FPV operation more easy.

2.4 FY-41AP Lite Can Be Connected To A Data Link

Connecting to a Data Link can increase flight distance. Additionally, when used with
FY-GCS (Ground Control Station) system you can view telemetry data of flight conditions
and more effectively, you are able to make changes real-time including change parameter,
flight attitude etc

3. FY-41AP Lite Configuration

NO

.

Module

Introduction

1

FY-41AP Lite module
Size: 61mm*39mm*14mm
Weight: 20g

2

GPS receiver module
Size: 32mm * 32mm * 13.5mm
Weight: 24g

3

Integrated with Current Sensor and regulate voltage
module to provide stable +5V to FY-41AP Lite and
provide stable +12V to FPV video camera and
transmitter at the same time.
Size: 50mm*24mm*18mm
Weight: 35g

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4

To measure airspeed
Size: 64.5mm * 13.5mm * 13.5mm
Weight: 9g

5

For FY-41AP Lite firmware upgrade
For connect data link to PC
For connect remote adapter to PC

6

For connect FY-41AP Lite to remote receiver

7

For connect video camera or video transmitter

8

Can weld to power manager module for connect the
batter and ESC

9

GPS extension wire

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4. FY-41AP Lite Connection Summary

Z

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5. S1~S8 Servo Interface Connection
Instructions

No.

Type

Traditional

Flying wing

V tail

Airship

S1

Aileron servo 1

Aileron &Elevator

mix control servo 1

Aileron servo 1

Not use

S2

Elevator servo

Aileron &Elevator

mix control servo 2

Elevator &Rudder

mix control servo 1

Elevator servo

S3

Throttle

servo/ESC

Throttle servo/ESC

Throttle servo/ESC

Throttle

servo/ESC

S4

Rudder servo

Not use

Elevator &Rudder

mix control servo 2

Rudder Servo

S5

Aileron servo 2

Not use

Aileron servo 2

Not use

S6

Not use

Not use

Not use

Not use

S7

Not use

Not use

Not use

Not use

S8

Not use

Not use

Not use

Not use

NOTE: When using remote adapter, S7 and S8 output the channel 7 and channel 8

signal of the RC receiver directly.

6. Connection Introduction

Connection Picture

Introduction

S1～S8 servo wiring connection
Pay attention to the signal wiring
sequence

Power manager wiring

GPS module wiring

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2×4P RC receiver wiring
For FY-41AP Lite

Black Red White —— AIL
Orange —— ELE Green —— THR

Yellow —— RUD Brown —— CH5

Blue —— CH6

Airspeed sensor wiring

Video camera wiring
Yellow-video signal
Red--+12V
Black--GND

Video transmitter wiring
Yellow-video signal
Red--+12V
Black--GND

Connect the USB data cable to
UART1 port to firmware upgrade for
FY-41AP Lite control module

Connect the USB data cable to
UART2 port to firmware upgrade for
OSD module

Data link wire
Connect the FY-602 data radio to
UART1 port

Vibration absorbing pads
(dampers),use for FY-41AP Lite
vibration damping installation.

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7. Main Module Installation

7.1 FY-41AP Lite Module Installation

When installing, please keep FY-41AP Lite horizontal and
as close as possible to the "Centre of gravity" (COG) of the
aircraft. The modules orientation can be changed by FY-GCS
(Ground Control Station) system: arrow to front, back, left or
right.

Efficient anti-vibration components are very important and to be used when installing.

You can use the included ‘vibration absorbing dampers’ or your DIY equipment. Please

note: For Nitro planes, flying without using efficient ‘anti vibration dampers’, will lead to
FY-41AP Lite working abnormally.

Arrow towards to left

Arrow towards to right

Arrow towards to back

Nose of the plane

Arrow forward（Default direction）

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7.2 GPS Module Install

GPS receiver module has integrated plate type GPS
passive antenna with stronger reception ability shielding the
false signal by ground reflection efficiently. Don’t install next
to metal or carbon fiber & other shielding material, which may
block satellite signal reception. Install the GPS module
horizontal and away from electromagnetic sources such as
ESC’s, power wires, servo wires & video transmitters which can interfere with GPS signal.

7.3 Power Manager Module Install

Power manager module supports 2S～6S lithium battery
input. The integrated current sensor can measure APM draw and
voltage; DC-DC module offers 5V to FY-41AP Lite meanwhile
12V to video camera and video transmitter. But servo power is
supplied by ESC or S1~S8 any port access.

7.4 Airspeed Sensor Module Install

The airspeed sensor need to pull ahead the front of the pneumatic opening and in the
line with the direction of flight, cannot tilt. You can install the Airspeed sensor to the wing
or in the front of the nose, do not block the front of the air inlet, we can use the glue to fix
the airspeed sensor. But can't completely obturate the end of the airspeed sensor, to
maintain pressure connected with the outside world. Note: Make sure that after installation,

the fuselage in flight airflow can not interfere with air intakes.

Static Pressure Port

Dynamic Pressure Port

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7.5 Remote Control Setting: SW1&SW2

FY-41AP Lite needs remote control and receiver with at least 6 channels, including 4
normal channels for AIL,ELE,THR,RUD, and two for SW1,SW2 to control flying mode.

You need to choose normal fixed wing plane mode canceling all mix control modes,
meanwhile setting CH5,CH6 to two three-switch.

FY-41AP Lite need two three-switch to control flying mode:SW1 for deactivated mode,
stable mode, 3D mode; SW2 for return to home and fixed
attitude and head locking mode (default mode),or circle
mode(need reset).

After setting the Switch, you can double check by
monitoring the indicator light on the module against
selected flying mode. Detail please see the “FY-41AP Lite
indicator light instruction”.

SW1&SW2 default set:

NOTE: SW-2 has priority over SW-1. Only when SW-2 is in the ‘Null’ Mode can SW-1
work. Therefore ‘Null’ should be one of the options for SW-2, otherwise SW-1 will not

work.

7.6 Gyroscope Reset

If the following conditions occur, the FY-41AP Lite initialization is
recommended:

1. The device has not been used for a long time.

2. There is a change in environmental temperature of over 30 degrees since last

flight.

3. The purple LED flashes continuously even when the FY-41AP Lite remains

stationary and you never activate the motor.(When in the non navigation mode, which

means SW2 is on the position “NULL”).

Note: For the better flight, we suggest that to do the gyro reset before each flight.

There are three way to realize the gyro reset. (The FY-41AP Lite must keep stationary

during the gyro reset procedure)

SW1

SW2

Deactivated

RTL

Stable

NULL

3D

ADH

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(1) Through SW1:

On SW1, switch ABM to Deactivated Mode 6 times, time interval has to be less than 3
seconds as follows:

ABM→ Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated

Mode → ABM → Deactivated Mode → ABM → Deactivated Mode → ABM → Deactivated

Mode.

After doing this operation, the LED will bright white light about 1S.Wait for the
LED go out, then the gyro initialization finish.

(2) Through OSD video overlay menu “INIT GYRO” option.
(3) Through the “ FYGCS 5.11 for 41& DOS ”setting software “Initialize the gyro”

button which in the “Autopilot Configuration Wizard” option.

(Note: Making gyro initialization via the OSD menu and the “FYGCS 5.11 for

41&DOS ” setting software, won't appear the phenomenon of the LED bright white light.)

7.7 FY-41AP Lite Indicator Light Instruction

FY-41AP Lite with three colors LED which can send out red,
blue, green light. Also yellow, white, purple and other colors light

through the combination.

Operators can know the FY-41AP Lite’s operating mode by judging the different
colors which the LED sends out and the flash frequency. Green light flash means GPS
location fixed, red and blue light indicate FY-41AP Lite working mode.

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Note: When the FY-41AP Lite needs Gyro Reset or FY-41AP Lite module is in a state
of motion, the LED will bright purple light.

e.g. Red Manual Mode, GPS not lock
Red—Red—Green Stabilized Mode, GPS lock
Purple—Purple—Green Stabilized Mode, GPS lock,

If it stay static means need Gyro Reset.

Blue—Blue—Green Fixed altitude & Heading lock Mode, GPS lock

7.8. OSD Interface Instruction

The integrated OSD module supports PAL or NTSC form video input.

OSD display interface:

No.

Instruction

No.

Instruction

1

GPS altitude(Unit: m)

10

Relative altitude (Unit: m)

2

The quantity of satellite used for

positioning

11

GPS speed (Unit: km/h)

3

Airspeed/GPS speed (Unit: km/h)

12

Flight total mileage (Unit: km)

4

The battery voltage (Unit: V)

13

Total flight time (Format:h:m:s)

5

Battery power consumed (Unit:

mA/h)

14

Current course of flight (Unit: deg)

6

Distance to Home Point (Unit: m)

15

The angle of turning to the Home Point

(Unit: deg)

7

Power battery current (Unit: A)

16

Attitude table

8

Flight mode

17

Relative position of Home Point (Icon

in the middle position when the

aircraft is around Home Point.)

9

Current latitude & longitude of the
plane (Format: dddmm.mmm)

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Flight mode instruction

Name

Introduction

Name

Introduction

RC

Deactivated mode

RTL

Return to home

3D

3DAerobatic Flight

ADH

Fixed altitude &

Heading lock Mode

ABM

Stable mode

ACM

Circle mode

8. FY-41AP Lite Setting

There are two ways to set the FY-41AP Lite, one is via remote control and OSD
overlay menu settings. Another solution is connected via USB cable to the computer by
using the setting software to set up. Here we introduce the use of these two methods.

Method one: Setting FY-41AP Lite via remote control and OSD overlay
menu

1 ) Activate the OSD setup menu: switch "ABM" to the "3D mode" 6 times in SW1,
between two switching it has to be less than 3 seconds, the process is as follows:
ABM → 3D mode →ABM →3D mode → ABM → 3D mode → ABM → 3D mode →ABM
→ 3D mode →ABM→ 3D mode. This will activate OSD setup menu interface.
2 ) Move Elevator stick to the project you want to set.
3 ) Move aileron stick to the project you want to set.
4 ) Please put elevator stick to SAVE, after your setting. Through the stick of ailerons
carried out to save the action, when saving, "SAVE" will flicker for two seconds, the end
of the flashing, been saved successfully.

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NO.

Setup instructions

NO.

Setup instructions

1

Auto-control rudder surface reverse

10

Circling radius setting

2

Control gain

11

Farthest flight distance setting

3

Ailerons

12

Airspeed adjust setting

4

Elevator

13

Rudder mixing mode

5

Throttle

14

Initialize gyroscope

6

Rudder

15

Initialize airspeed sensor

7

Three-switch mode selection

16

Save the settings

8

FY-41AP Lite install setting

17

Exit the Settings interface

9

Cruising speed setting

Method two:
Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS” software

1 ) Please visit the official website: www.feiyu-tech.com. Download the newest setting
software “FYGCS 5.11 for 41&DOS” and the USB driver at the download page which
related to FY–41AP Lite products.
2 ) After successfully install the USB driver, insert the USB-TTL interface cable into
computer USB COM port(don’t connect TTL port to any other device ) , the system will
correctly identify the USB -TTL data cable, then you will find there is more than one
port(COM and LPT), the port COM6 in the “Silicon Labs CP210x USB to UART Bridge
(COM6)” is the Virtual serial number.

Inserter a few times for confirmation the virtual serial number. After that, you can use

the new USB data cable normally.

3 ) Install the software “FYGCS 5.11 for 41&DOS”. The software in addition to can use
for setting up and configuring FY-41AP Lite also included other functions. For example,
Electronic mapping, Telemetry data monitoring of flight parameters, Flight attitude, Flight
speed, Altimeter, Location, Recording and Playback of telemetry data into Ground
Control Station, Map loading ,etc .

a) Double-click “ ” installed by default.

b) After installation, double-click “ ” to open the FYGCS5.11 software,
you can see the following interface.

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Note: If you can’t open FYGCS5.11 successfully in Vista, Win7, or Win8 operating

system . Please find out executable file, right click the mouse and run as

administrator.

Please according to the picture below, through USB data cable to connect FY-41AP
Lite to PC.

Connect FY-41AP Lite to your PC, select corresponding COM port. Baud rate has to
be“19200”, click “connect” button. After FY-41AP Lite establish connection with the GCS

software successfully .Select the “Menu-> Autopilot Configuration Wizard” ,you can finish

the setting in the configuration wizard. The last,you can click the button “ ”
to save the setting into the FY-41AP Lite controller.

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Step One: Installation direction setting

First you should set the correct mounting direction according to the FY-41AP Lite
mounting direction on the plane(The default setting is Arrow forward).After choose the
correct mounting direction, pitch and roll inclined the plane and checking through the
attitude chart whether the posture and aircraft state is identical.

Method one: Setting FY-41AP Lite via remote control and OSD overlay menu

Setting via the "Install Setting" option in the OSD menu.

Method two: Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS” software

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Step Two: Servo’s output mix control mode setting

No.

Option

Normal

Elevon

V-Tail

Normal

“AIL NAV”means using only aileron make a turn in navigation mode.

”RUD NAV”means using only rudder make a turn in navigation mode.

Method one: Setting FY-41AP Lite via remote control and OSD overlay menu

Select the correct rudder output based on the aircraft model. Setting via the “MIX
SETTING” option in the OSD menu.

Aircraft Config

Mix Setting Selection

Remark

Traditional

aircraft layout

with Aileron

1.Normal

Navigation control using aileron.

4.Normal(RUD NAV)

Navigation control using rudder.

Flying wing

aircraft

2.Elevons

Navigation control using aileron. Used

for most kinds of flying wing planes.

5.Elevons(RUD NAV)

Used for flying wings with independent

rudder for Navigation.

V-Tail aircraft

with Aileron

3.V-Tail

V-Tail with navigation via aileron.

6.V-Tail(RUD NAV)

V-tail planes with independent Rudder

for navigation control.

Traditional

aircraft layout

with no Aileron

1. Normal

The rudder servo must be connected to
FY-41AP Lite aileron servo output (AIL)

V-tail without

aileron

2. Elevons

V-tail servo has to connect to FY41AP

Lite Differential Servo 1 & 2 output.

Airship

4.Normal (RUD NAV)

Due different airship configurations,

use with caution. Carry out test flights

to confirm normal function.

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Method two: Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS” software

Step Three: The remote control switch setting & checking
and setting the direction of the rudder surface automatically
control .

FY-41AP Lite requires a minimum of 6-channel RC receiver.

1) First, the remote control is set to fixed-wing aircraft of conventional layout mode,

do not set any mixing. The rudder angle of the remote control is set to 100%, and

fine-tune gyrus.

2) Need two three-position switch or rotary switch settings for CH5, CH6 used to

connect SW1 and SW2. Use for switch the flight mode.

3) Connection is completed, switch CH5, CH6 to check the settings whether can

correct setting control mode. Also you can confirm it via the status of the lights, or

OSD display mode.

4) Switch to manual mode, check the control surfaces of the joystick remote control

aircraft direction whether is correct, if not correctly, adjust the rudder surface reverse

control on the remote control to correct it.

5) Switch to the "Auto Balance Mode", check the control direction according to the

following steps carefully.

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Method one: Setting FY-41AP Lite via remote control and OSD overlay menu

In the OSD menu, you can change the direction of the rudder control via the “REV”
list of the “Servo Gain REV” option.

Method two: Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS”
Software

( 1 ) AILERON (Check in "Auto Balance Mode" )

RIGHT Roll the plane, the right aileron should automatically move downwards, while
the left aileron move up.

LEFT Roll the plane, the left aileron should automatically move downwards, while the
right aileron should move up.

If the servo movement is incorrect, you need to reverse the automated servo
movement, please select “AIL REV”.

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Upward

Roll right

Downward

Upward

Downwar

Roll left

( 2 ) ELEVATOR (Check in "Auto Balance Mode" )

UPWARD incline the plane nose, the elevator should automatically move
downwards.

DOWNWARD incline the nose, elevator should automatically move upwards.

If the servo movement is incorrect, you need to reverse the automated servo
movement, please select “ELE REV”.

Downward

Upward

Nose Up

Nose Down

( 3 ) Rudder (Check in "Auto Balance Mode" )

CLOCKWISE rotate your plane, the rudder should move to the Left.

COUNTERCLOCKWISE rotation, the rudder should move to the Right

If the servo movement is incorrect, you need to reverse the automated servo
movement, please select “RUD REV”.

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Turn left

Rudder moves to the right

Turn right

Rudder moves to the left

( 4 ) Throttle

Push throttle from light to strong, if the servo display chart of the remote control is
display (-100 to 100) please don’t select the” throttle reverse” option in the rudder reverse,
if display chart display from big to small (100 to -100), please select the” throttle reverse”
option in the rudder reverse.

In general, use ESC for throttle controlling can be choose the default settings (NOR),
without ESC reverse setting.

Step Four: Basic sensitivity setting for automatic control

We suggest that the first flight should be in default value, then adjust the value
according to the actual flight.

Adjustment principle: check the gain of stability whether it is normal in the "Auto
Balance Mode “.

Control aircraft in roll, then loosen the rocker, observe that whether the plane can be
automatic recovery level. Control aircraft in pitch, then loosen the rocker, observe that
whether the plane can be automatic recovery level. If the automatic recovery control can
not strong enough, you can tone the gain of stability. If the pitch and roll swings back and
forth, it means the parameters is too big, it need decrease to a small amount.

The greater gain of RUD the weaker effect of the servo when in making a turn .

In general gain of the throttle do not need to adjust, if the airspeed have a small space
velocity shock in automatic navigation, you can decrease the parameter to suitable.

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Method one: Setting FY-41AP Lite via remote control and OSD overlay menu

In the OSD menu, you can change the gain of the rudder control via the “Gain” list of
the “Servo Gain REV” option.

1) Every channel's gain can be set separately (AIL,ELE,THR,RUD), setting

range:0-99.

2) Min:0, equivalent shut down auto balance function.

3) Gain means the sensitivity of automatic control, will affect the navigation control
and the effect of the automatic balancing directly. If setting too small the effect of the
automatic balance is not good, and if setting too much will cause the plane shaking.

4) General condition, we suggest that use the default parameters(50).Please do not
set control gain to a very large number at your first flight .The best way is adjusting
according to more test flight. Under the condition of allowing, we suggest that the
parameter should be adjust to bigger value as far as possible, so that conducive to
balancing of the plane.

Method two: Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS” software

Step Five: The cruise speed and hovering flight radius setting

Target speed setting (Default setting is 60km/h): The flight speed is very important,

it cannot be set optional. The speed should be make the aircraft keep normal flight. We
suggest not increase the settings too high, it may cause very unusual flying behavior and

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may result in damage of your aircraft due to excessive throttling.

You can observe the "GPS velocity" on GCS software when in flight, and to evaluate

the aircraft's cruising speed.

Circle radius: It means the radius of the hovering flight. Speed of the plane which
achieve 60 km/h, the circle radius should be set to more than 80 meters .We suggest that
the circle radius should be set more than 1.6 times of the flight speed. Such as the speed
of the plane is 100 km/h, the circle radius suggest that set in 160 meters. If the circle
radius is set too small, hovering flight may not be able to normal, maybe the plane will
decrease flight altitude, even cause the dangerous of air crash.

Method one: Setting FY-41AP Lite via remote control and OSD overlay
menu

You can set the” Target speed” and the “Circle radius” via the “Flight” option in the
OSD menu (Speed: Target speed, CIR RAD: Circle radiu).

Method two: Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS” software

Step Six: Gyro and airspeed sensor initialization

Gyro Initialization: When doing the gyro reset, please keep the aircraft static. It’s

better to do the gyro reset before each flight.

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Airspeed sensor initialization: The aircraft keep static, you can use your hand to
cover the port of the airspeed sensor, and do not let the wind interfere with the airspeed
sensor, then execute the initialization operation. After that please check whether the
airspeed showing on GCS is in the vicinity of 0-3.Due to the sensor error, there are some
tiny airspeed value on the ground is normal.

Method one: Setting FY-41AP Lite via remote control and OSD overlay
menu

The “COMFIG” option in the OSD menu (INIT GYRO).

Method two: Setting FY-41AP Lite via “FYGCS 5.11 for 41&DOS” software

Step Seven: Record attitude

The default attitude angle is “0” (zero). After finish the installation, the aircraft place
to the level flight attitude, then record the attitude. This function is used to eliminate any
installation deviation from the default.

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When record the level flight attitude on the ground via toggle switch, it will initialize the
gyro at the same time, so ensure the aircraft absolute static. Please according to following
steps to complete the recording.

1 ) The aircraft put on the ground in level flight attitude, keep static.

2 ) Under the RC mode, the remote control rocker position in the middle, the throttle
rocker position to the lowest ,adjust rudder surface to leveling.

3 ) Switch to the ABM mode ,then switch from ABM mode to the RC mode 8 times,
the LED light from white to green, and then the aileron rudder surface will execute an
operation that a tilt and then back to the flat to prompt the success of the recording.

“ABM→RC→ABM→RC→ABM→RC→ABM→RC→ABM→RC→ABM→RC→ABM→RC

→ABM→RC”.

This operation will finish the recording and save permanent automatically.

Note: The first flight or after upgrading firmware, you need to record level flight

attitude. But don’t need to record before every flight.

9. FY-41AP Lite First Flight Test Checklist

Adjustment of the aircraft

Fine-tuning adjustment after take-off in balanced mode, leveling the aircraft the

throttle placed into cruise throttle position. If the manual mode level flight trimming,

and the level of the balanced mode fly to fine-tune a lot of difference, it is recommended
that record level flight attitude again. If the manual mode leveling switch to balance mode,
the aircraft bow, you need to elevate the head record level flight attitude, and vice versa
pad low head re-recorded.

Take off

Take off in manual mode. If you are confident, after completing the basic check, you
can take off in ABM, This is more suitable for the remote control skills are not enough
skilled operator.

Other settings can temporarily use the default settings, the following can be
flown for the first time. After each set and do not forget the "Save parameters"

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Return to launch test

Switch SW2 to Return To Launch (RTL) mode to watch the aircraft automated return
to home or not. Upon reaching the home point it will automatically engage auto circling,
while it waits for your further instructions.

Cruising speed setting

You can adjust this cruising speed as per your model’s requirement. Fly the plane in
the speeds most comfortable for cruising and set that value via the setting software.

Landing

Now that we have completed the basic test, landing or other features of the test.

Auto balance mode test

a) This paragraph explains the interactions between pilot input, Auto Balance Mode

(ABM) and autonomous flight (Navigation Mode).

b) In ABM, the FY41AP Lite will constantly want to keep the aircraft flying level and

straight. Any pilot input will go against this stabilizing action, in order for you to
change the course, altitude or angle as you fly the plane.

c) The higher the Gain setting: AIL, ELE & RUD, the more you will feel the aircraft

fly ‘less flexible’, this is normal. The higher the Gain, the stronger will be the
leveling action of the FY41AP Lite. And the smaller the RC input you have on the
aircraft.

To counter this, reduce the Gain until you feel the plane’s flying attitude is

comfortable for your flying style.

d) Alternately, if the Gain setting is too low, the aircraft self leveling will be weak and

the greater the pilot manual control will be.

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10. Other Functions And Settings

10.1 Switch ( SW2 ) Function Setting

You can select the Auto Circling Mode which control by SW2.The navigation models
of FY-41AP Lite show in the table, we can just select two modes for SW2 at the same
time.

SW2 Mode

Function

Remark

Null

SW-2 Deactivated

SW-2 set to NULL, Flying mode is controlled by
SW-1.

Go Home

Auto Return To Launch

On activation, plane will automatically return to
launch (RTL) point.

Line

Fixed altitude & Heading lock

flight Mode

With no controlling input from the pilot, the
plane will automatically lock current heading &
maintain altitude.

Circle

Auto Circling Mode (ACM)

Automatically fly, circling a fixed point. Centre is
at point of ACM activation.

You can set the SW2 functions by using “FYGCS 5.11 for 41&DOS” software. After
FY-41AP Lite connect to the GCS software successfully, you can select
“Menu->Autopilot Setting->RC Setting” to finish the switch mode setting.

10.2 RC Max Distance Setting

The RC Max Distance Setting will not allow the plane to fly beyond the distance you
have set. Upon reaching this distance, the FY-41AP Lite will automatically engage RTL
and fly back to you.

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The default RC Max Distance Setting programmed into the FY-41AP Lite is 4000
meters. You can adjust this parameter via “FYGCS 5.11 for 41&DOS” software. After
FY-41AP Lite connect to the GCS software successfully, you can select “Menu->Autopilot
Setting->RC Setting” to finish the RC Max Distance Setting.

10.3 Circling Radius Setting

The FY41AP Lite can fly over a set GPS point upon activation of Auto Circling Mode
via switch SW-2.

The default circling radius is 80 meters. You can adjust this circling radius using the
Setting Software function. Press ‘Set’ button to confirm and save your updated circling
radius.

10.4 The Altitude Of Return To Launch Instructions

When activated in this mode, if the current altitude is greater than 50meters, the
FY-41AP Lite will automatically fly the plane back to the home point. Then after the aircraft
back to the target point, if the altitude greater than 100 meters , the plane will down to
100 meters while circling .For the FY-41AP Lite , there is 50 meters protection altitude for
return home. If the current altitude below 50 meters when activate into RTL, the aircraft
will climb to 50 meters to return.

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10.5 FAIL-SAFE Setting

The RC receiver remote control mode uncontrolled return of function, you need to
use with runaway protection function remote and the receiver.

Failsafe remote control receiver when no signal is received, output a default set
of rudder. Various models of remote control set runaway protection have said, the

reference to the remote control manual.

Return channel CH6 need to set connected to SW2 is out of control out of control
protection switch to the status of the return. Aileron, elevator, rudder channel is set to
loose rod status, throttle setting have two situation

(1) If connect the airspeed sensor to the FY-41AP Lite controller, the throttle don’t
need setting, the controller will output a proper controlled quantity according to the target
speed.

(2) If you are not use the airspeed sensor ,the throttle need to set to cruise throttle
position.

If debugging balanced mode have been done well, the following steps will show you
the setting runaway protection (Take the Futaba remote control T10CHG for example).

Settings, turn off the power to the aircraft, to avoid setting the motor starts.

First enter the remote control setup menu to find the set of "F / S"; into the F / S menu,
the lever into the neutral position, rudder trimming to maintain the status adjusted, the
throttle lever to the cruise throttle position(apply to situation (2)), the CH6 cut to return
mode. Then in all open channel F/ S, and often set by the "PUSH" button, set successfully
as shown.

After setting the aircraft, powered off the remote control and check whether it can
successfully entered the return mode. Pay attention to safety, to prevent the Failsafe

motor rotation, met items cause damage.

10.6 Fixed Altitude & Heading Lock Mode Instruction

Fixed altitude & Heading lock Mode – This mode maintains aircraft flight course &

holds the altitude on activation. By using GPS data, the system automatically corrects
flight course deviation & maintains straight-line flight.

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Attention: Please make sure the RC stick is released when you switch into
Fixed altitude & Heading lock Mode. The FY-41AP Lite can record current RC stick

position and lock the flight course and altitude when your RC stick released.

10.7 3D Mode Instruction

3D Mode – If no input is given by the pilot (all sticks in the middle position), 3D mode

will lock the current aircraft attitude. Therefore the aircraft can be easily maneuvered to
complete a variety of 3D flight with added stability & smoothness.

Attention: Please make sure the RC stick is released when you switch into 3D
Mode. The FY-41AP Lite can record current RC stick position and lock the flight

attitude when your RC stick released.

10.8 Auto Circling Mode Instruction

Auto Circling Mode – On activation, the plane will maintain altitude and flight speed,

while initiating a counterclockwise circle. The centre of the circle is the point of activation
at a default radius of 80 meters (can be changed via FY GCS).

10.9 Link Mode (RC Receiver Control Mode/Data Radio
Control Mode)

FY-41AP Lite there are two remote control mode, the default setting for the RC
receiver mode. Directly connected to an RC receiver RC mode, selected data
transmission with a remote control adapter plate and several transmission radio remote
control radio remote control mode (you need to buy another ground station upgrade
package).

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Appendix

Appendix : Flight Area Map Making

（1） Download the FY Offline Map from our official website and open it.

（2） Name the map on the “project names”.

（3） Map types:

A. For Chinese users, Baidu HD Satellite is suitable and better, it can offer high

quality Map in some areas. But the Map cant be found in some other remote

areas.
B. Google Satellite(China Server) is suitable and better for Chinese users.
C. Google Satellite(Global Server) is suitable for people from all over the

world expect China and a few other countries, the latter people cannot use

the global ser ver successfully.
D. If you cannot load the appointed area on the Map for the reason of the

Explorer, you can use the function of “Enter Range”(Google Global Server),

and input the loading area on the software. But Chinese and a few users

from other countries may cannot use this function successfully.

（4） Choose the map resolution.

（5） Click the right mouse bottom both at the upper left corner and the bottom right

corner of the suitable area, then it will display a yellow selection area or six
coordinate points enclosing a rectangular.

（6） The procedure begins to work when you click the function ”download”. The

green words in the log indicatting that you have loaded Map tiles successfully. If

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it shows red words indicatting that the download is fail for the reason of network
connections or the problem of server access. A complete Map is generated after
downloading successfully, and three files with suffix (.gst /. jpg /.tab) will be

generated and saved at appointed software directory. That is to say, the files

will be saved at “Offline Projects”. Note that users can not change the directory
to save files.

 Please install IE 10 and above before using.
 The language of the software can be changed by clicking “Englsih”.
 The KML file can be loaded by clicking “Load KML”.
 The image resolution cannot be too high if the selected area is very large. The

more thread counts, the faster download speed, and the more overload on the
computer, this may easily cause the Map unsuccessfully loaded.

–––– END ––––

Note: We reserve the right to change this manual at any time! And the newest edition will
be shown on our website www.feiyu-tech.com.