LRP gravit GPS User manual

USER GUIDE
LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
INTRODUCTION 5
INCLUDED IN THIS PACKAGE 5
TECHNICAL SPECIFICATIONS 6
PLEASE NOTE 6
SOME HINTS AND TIPS BEFORE YOU START 7
Range of your Gravit 7
Flight Time 7
Flight speed 7
Where and how to fly 7
Take care of your Gravit’s compass 8
THE GRAVIT GPS 9
The Status-LED 10
FUNCTIONALITY OF A QUADROCOPTER 11
THE TRANSMITTER 12
Transmitter low voltage-warning 12
Switching flight modes with your
transmitter (SWA- and SWB-switches) 12
Flight Preparations 13
Charge your flight battery 13
Insert batteries into your transmitter 13
ONLY FOR GRAVIT GPS VISION:
Check you camera mount 14
ONLY FOR GRAVIT GPS VISION PRO:
Gimbal-calibration 14
Mount your propellers 15
ATTENTION! Check wireless status
of your Gravit’s camera 15
COMPASS CALIBRATION 16
TAKE OFF-PREPARATIONS 17
TAKE OFF 17
BASIC FLIGHT OPERATION 18
Throttle control 18
Yaw control (rudder) 18
Pitch control (elevator) 18
Roll control (aileron) 18
Keep an eye on your
status-LED 19
LANDING YOUR GRAVIT 20
Bring down the Gravit manually 20
"Catch-land" your Gravit 20
Auto-land your Gravit=Return-to-Home 21
ADVANCED FLIGHT OPERATION 22
Retain your orientation 22
When loosing control 22
THE FLIGHT-MODES 23
BALANCE-mode 23
ALTITUDE-mode 23
GPS-mode 24
Return-to-Home-mode 24
CIRCULAR-mode (POI, Point of interest) 25
HEADLESS (FLYING)-mode 25
CRUISE-mode 26
MANUAL-mode 26
TABLE OF CONTENT
2

THE CAMERA 27
Charging the camera 28
Camera modes 29
Camera settings 29
PC-connection 30
WiFi function 30
THE GIMBAL 31
What is the gimbal good for? 31
Before using your gimbal 31
Gimbal control 31
Gimbal restrictions 32
Gimbal Tweaking 32
THE STANDARD CAMERA MOUNT 32
REPLACING PROPELLERS 33
SOFTWARE 33
Disclaimer 33
AutoPilot 34
Frame 34
System 35
Geo-Fencing 35
Voltage alarms 35
EndPoint 36
ModeMap 36
Firmware 37
Transmitter calibration 37
IMU (Gyro) calibration 38
iSmart DV 38
MANUAL IMU- AND TX-CALIBRATION 38
TROUBLESHOOTING GUIDE 39
SPARE PARTS 40
REPAIR PROCEDURES / LIMITED WARRANTY 42
WARNING NOTES 42
GENERAL NOTES 47
TABLE OF CONTENT
3

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
4

Dear customer,
Thank you for choosing this LRP product. The Gravit GPS is a high-quality, high-performance quadrocopter suitable for outdoor
flying and aerial photography.
It is powered by 4 powerful brushless motors and equipped with a FULL-HD WiFi action-cam ex works. The high-quality 2.4
GHz 8-channel transmitter will provide efficient and full-range control and different flight modes will assist you during your flight.
Since your Gravit GPS is a very complex quadrocopter with many functions, we strongly advise to read through this manual
carefully in order to understand all the functions and to get the maximum fun out of your Gravit GPS.
INTRODUCTION
1x Gravit GPS quadrocopter
1x 8-channel 2.4GHz transmitter
4x black propellers
4x white propellers (spare)
1x Full-HD WiFi action-cam
1x Standard mount for WiFi action-cam
1x Set of accessories/mounts for WiFi action cam
1x 3300 mAh 3S Lipo Pack
1x Balance Charger
1x Quick Manual
1x 2-axis brushless gimbal with mount (#220721 ONLY)
INCLUDED IN THIS PACKAGE
5

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
Rotor diameter 240mm Video function yes
Overall diameter 350mm Photo function yes
Overall height 170mm GPS yes
Weight (AUW) max. 1200g GPS functions Position Hold
Headless Flying
Circle
RTH
Cruise
Geo-Fencing
LED-lights yes Camera resolution max. 1080p
Control functions up/down, forward/back-
ward, turn left/turn right,
hover sidewards
Flight modes Attitude
Altitude Hold
GPS-mode
Transmitting frequency 2.4GHz Flight controller
configuration
yes
Battery technology LiPo Propeller 9443, self-tightening
Battery capacitiy 3300mAh
PLEASE NOTE:
The Gravit GPS ships in 2 different kinds of configurations:
a) #220720 Gravit GPS Vision: Gravit with action-cam
b) #220721 Gravit GPS Vision Pro: Gravit with action-cam and 2-axis gimbal
Depending on the version you have bought, the configuration and function varies.
If a chapter of this manual is only suitable for certain versions of the Gravit GPS, this will be indicated accordingly.
TECHNICAL SPECIFICATIONS
6

150m
Launch Point
50m
Range of your Gravit
Your Gravit is equipped with a full range high-quality 2.4GHz
transmitter system and you should not experience any range
issues. In case that you are flying in an unobstructed area with
no interferences around (which we STRONGLY advise), you
should have a range of at least 500 m.
This is far more than you would normally fly your Gravit away
and is almost beyond the line of sight for a quadrocopter of
this size.
PLEASE NOTE: For the sake of safety, the Gravit is limited to
a maximum height of 50 meters and a maximum horizontal
range of 150 meters ex works. Those limitations are made
possible by the powerful Geo-Fencing feature of the Gravit
GPS. Those limits can be changed (increased or decreased)
with a software available for your Gravit. Please read more
about the Geo-Fencing feature and the software in the appro-
priate „Software“ chapters of this manual.
Flight Time
The standard flight time with the provided battery will be
around 10 to 12 minutes, depending on the version of the
Gravit you have bought. The Gravit GPS Vision #220720 is
the lightest version with the longest flight time, the Gravit GPS
FPV #220722 is the heaviest version with the shortest flight
time (but the best functionality). The Gravit GPS Vision Pro
#220721 is in between the two versions.
Please note that the flight time also depends on many other
factors, like environmental conditions (wind) and flying speed
and style.
If you want to increase your flight time, check out the high-
capacity tuning LiPo that we are offering especially designed
for your Gravit GPS. This LiPo has a capacity of 4400 mAh,
which will give you extra 4-6 minutes of flight, depending on
your Gravit version and flying style.
The tuning LiPo will give you a flight time of awesome 14-18
minutes.
The order no. of the tuning LiPo is #430060, you can buy it
from your LRP-retailer.
Flight speed
When you first fly your Gravit, you may note that the flight
speed seems rather slow. This is because the maximum flight
speed was set to 4m/s ex work. The reason for this rather
slow flight speed is that the Gravit GPS is PRIMARILY a qua-
drocopter for aerial photography.
And when shooting video, the slow speed GREATLY contri-
butes to the good quality of the video footage. However, you
may increase the speed of your Gravit, which makes it really
fast and agile. You can change this setting using the configu-
ration software freely available for the quadrocopter. Please
read more about this feature in the chapter „Software“ of this
manual.
Where and how to fly
Whenever you fly with your Gravit, please bear in mind that
you are not allowed to fly everywhere. Always fly according to
the legal requirements valid in the area/country you are flying.
We also STRONGLY advise NOT to fly in crowded or obst-
ructed areas or near people or animals.
Always fly reasonably and respectfully and according to your
piloting skill and you will get the most fun out of your hobby!
When using your camera for taking photos and shooting video,
also bear in mind that you are not allowed to use a camera
everywhere. In addition, other people might feel disturbed, so
always ask for permission before you start to film when people
are around.
When performing the compass calibration, make sure you
are not near any metal objects or any other potential inter-
ferrences.
SOME HINTS AND TIPS BEFORE YOU START
#430060
7

B
B
A
A
LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
Take care of your Gravit’s compass
Along with a lot of other electronics, your Gravit GPS is
equipped with a compass module. This compass is located on
the rear lower part of the left landing feet, secured in a mount.
Since the compass is a very sensitive component, please take
care of the following points:
1) Do not touch the compass directly with your hands
If want to grab your Gravit on the landing feet, please do
so on the right landing foot. The Gravit can easily be held
by only one landing foot, just make sure you grab it on the
top of the landing foot.
2) Make sure not to touch the compass with any metal tools
you might be using, like screws drivers, etc.
3) Do not put your Gravit on metal surface or near large metal
objects if possible, as this can interfere with the compass
as well.
In case your compass gets deranged and does not work pro-
perly, the status-LED on the backside of your Gravit will show
this by a continuous yellow light.
Try to move your Gravit to a different location. If the light
continues to shine yellow, do a compass calibration according
to the manual, chapter „Compass calibration“
PLEASE NOTE: Also check the connector that goes into the
compass module on your Gravit’s landing feet. If this connec-
tor is not properly seated into the compass module’s socket,
this will also result in a yellow status-LED.
NEVER fly with a compass that is not working properly, as this
may lead to erroneous flight behaviour and result in damages.
2 or more Gravit GPS pilots
In case you are flying with 2 or more Gravit GPS models at
your favorite area of flight, PLEASE NOTE:
Turn on one Gravit and one TX after the other, NOT all mixed
up or at the same time!
Example: Pilot A turns on his Gravit A first, then pilot A turns
on his TX A. AFTER the Gravit A and the TX A are bound, pilot
B does the same with his Gravit B and his TX B (and so forth
for every further pilot).
If you strictly stick to this procedure, you can make sure that
you are controlling YOUR Gravit instead of your pilot-friend’s
one.
SOME HINTS AND TIPS BEFORE YOU START
8

USB Port
Battery compartment WiFi-cameraCompass moduleStatus LED
THE GRAVIT GPS
Propeller
Brushless Motor
Landing feet
Battery compartment
Camera mount
WiFi camera
Position lights
9

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
The position-lights
On the bottom side of your Gravit’s 4 arms, there are large
and bright LEDs. Those LEDs serve as position-lights and help
to you to keep track of the Gravit’s orientation in the sky. In
addition, the LEDs make it possible to fly the Gravit in twilight.
Please keep in mind that:
The 2 front LEDs are GREEN
The 2 rear LEDs are RED
The Status-LED
Your Gravit GPS features a large, bright Status LED at back
side of the bodyshell.This Status-LED is reporting on your
Gravit’s status as soon as the Gravit is powered on. When you
look at the LED, you will notice that it’s constantly emitting
blinks in certain color-patterns. Those patterns will tell you all
different kinds of things, you only have to understand what
they mean. At the end of chapter, you will find a compilation of
all the blinking-codes your Gravit might emit along with a short
description of what they mean. For more detailed informati-
on on a specific blinking-code, read through the appropriate
description of blinking-code’s function.
THE GRAVIT GPS
Initialization and pre-heating phase
Duration depending on temperature conditions: lower temperatures
result in longer initialization process and vice versa. At the end of
the initialization process, the Gravit is playing a short melody.
2 red blinks (followed by ANY other code) always indicate that NO
satellite-lock has been acquired yet GPS-assisted features like
Return-to-Home don‘t work
2 blue blinks signalize BALANCE MODE with full satellite lock
1 green blink signalizes ALTITUDE MODE with full satellite lock AND
ALL control sticks CENTERED (= NO MOVEMENT)
2 green blinks signalize GPS-MODE with full satellite lock AND ALL
control sticks CENTERED (= NO MOVEMENT)
3 green blinks signalize AOC-MODE (HEADLESS/CIRCULAR(POI)/
CRUISE) with full satellite lock AND ALL control sticks CENTERED
(= NO MOVEMENT)
1 green blink followed by 2 blue blinks signalize ALTITUDE MODE
with full satellite lock and control sticks NOT all centered (=Quadro-
copter is flying/moving)
2 green blinks followed by 2 blue blinks signalize GPS-MODE with
full satellite lock and control sticks NOT all centered (=Quadro-
copter is flying/moving)
3 green blinks followed by 2 blue blinks signalize AOC-MODE
(HEADLESS/CIRCULAR(POI)/CRUISE) with full satellite lock and
control sticks NOT all centered (=Quadrocopter is flying/moving)
Continuous green blinking signalizes Return-to-Home MODE has
been activated and the Gravit is returning to its take-off position or
is auto-landing (depending on the setting-details)
First level of low voltage warning has been reached, you should
land your Gravit asap. Depending on the settings (see chapter
“Software“), it is possible that the Gravit initiates a “return-to-home”
and flies back to its take-off position and lands.
Second level of low voltage warning has been reached Gravit
will either auto-land or return-to-home (depending on settings)
The compass is not working correctly. You are near metal objects,
which cause interference with the compass or you need compass
calibration
IMU-calibration necessary
10

A quadrocopter controls its direction of flight by varying the ro-
tation speed of its 4 rotors. Due to the different rotation speed
the rotors generate different ascending forces and the model
flies in the appropriate direction. For example: If you issue the
Gravit the signal to fly fowards (by pushing the throttle stick
forwards), the Gavit evenly increases the rotation speed of its
two rear rotors. By doing so, the two rear rotors generate a
stronger ascending force than the two front ones and therefore
your Gravit pitches forward and flies in the correspondent
direction.
QUADROCOPTER MOVEMENT
Movement around vertical axis = Yaw
Movement around lateral axis = Pitch
Movement around longitudinal axis = Roll
FUNCTIONALITY OF A QUADROCOPTER
Vertical axis
(= Yaw)
Longitudinal axis
(= Roll)
Lateral axis
(= Pitch)
11

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
THE TRANSMITTER
AUX1 (Gimbal Roll) AUX2 (Gimbal Pitch)
Power LED
Throttle
Yaw
On/Off switch
SWA:
AOC-Mode
RTH
Mode LED
Trims
Pitch
Roll
SWB:
BALANCE-Mode
ALTITUDE-Mode
GPS-Mode
Trims
Transmitter - low voltage-warning
The transmitter of your Gravit has a 2-step low voltage-war-
ning. This feature will warn you in time that the batteries of
your transmitter are getting weak and should be exchanged for
fresh batteries soon.
Step 1: The red power LED of your TX begins to blink slowly
and the TX is emitting a continuous beep-sound
Step 2: The red power LED of your TX blinks faster, the bee-
ping sound stops again. Shortly after, the TX switches off.
You should make sure that you replace the batteries as soon
as the first low voltage-warning kicks in. Don’t panic: At this
point in time, you will have plenty of time left to safely land
your Gravit in case you should be flying at this moment.
Switching flight modes with your transmitter (SWA- and
SWB-switches)
You can switch between the different flight modes of your
Gravit by using the two 3-way-switches on the left (SWA) and
on the right side (SWB) of your transmitter. In detail, switching
between the different modes works like this:
12
AUX1
AUX2

SWB(right 3-way-switch):
The SWB is the main flight-mode switch. It switches between
the “basic” 3 flight-modes as follows:
SWB in Pos. 0 (top): BALANCE-MODE
SWB in Pos. 1 (middle): ALTITUDE-MODE
SWB in Pos. 2 (low): GPS-MODE
SWA (left 3-way-switch):
This switch is used for the special functions and flight modes.
It switches the following functions:
SWA in Pos. 0 (top): NO OWN FUNCTION, flight mode se-
lected by switch SWB is active
SWA in Pos. 1 (middle): AOC-MODE (this can EITHER be
HEADLESS, CIRCLE (POI) or CRUISE, depending on your set-
tings, see chapter “Software”)
SWA in Pos. 2 (low): Return-to-Home (RTH) , see chapter
„Landing your Gravit“
PLEASE NOTE: AS SOON AS the SWA switch is flicked to any
other position than Pos. 0 (top), that is Pos. 1 or Pos. 2 (middle
or low position), IT OVERRIDES the function of SWB. Or in
other words: NO MATTER which position your SWB-switch is,
as soon as you move the SWA-switch to either to Pos.1 OR to
Pos. 2, those functions of the SWA will be active and cancel
the current function of SWB.
For example: Let’s say you have flicked SWB to Pos. 1, using
ALTITUDE-MODE. As soon as you flick SWA to Pos. 2, the
Gravit will cancel to fly in ALTITUDE-MODE and initiate Return-
to-Home as selected by SWA.
For a better understanding, here is a small table which show
the DEFAULT switch-combinations of SWA and SWB and the
resulting flightmode or function:
SWA Pos. SWB Pos. Active flight mode
0 0 BALANCE-Mode
0 1 ALTITUDE-Mode
0 2 GPS-Mode
1 Any AOC-Mode
2 Any RTH
Those switch assignments may be changed using the soft-
ware (for details check chapter “Software”).
For a detailed description of the different flight modes, please
see chapter “The flight-modes”.
Charge your flight battery
Before the first operation, please charge your flight battery. To
do so, connect the power-cord with your charger and a power
socket and then connect the balancer-connector of your flight
battery to the charger. Watch out for correct polarity when
doing so.
When the battery is connected to the charger, the charging
process is indicated by red LEDs. Please wait until ALL 3 LEDs
of the charger have turned to green color! Only then has the
LiPo been fully charged and you can disconnect it from the
charger. Please note: The charger equalizes and balances the
different cells of your battery during the charging process.
This kind of behaviour ensures the gentlest charging process
possible and dramatically increases your battery’s life-span.
However, charging a battery like this is relatively slow and
takes around 3-5 hours. So please don’t be worried if the char-
ging process is not completed as quickly as expected. Your
battery will thank it to you!
Insert batteries into your transmitter
Please insert 4xAA batteries into your transmitter. Open the
battery compartment on the back of the transmitter by sliding
down the cover, insert the 4 batteries then close the cover
again.
THE TRANSMITTER
13

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
ONLY FOR GRAVIT GPS VISION – Check you camera mount
Make sure that the camera is properly seated in the camera
cage and that the camera cage is securely connected to the
mount.
The camera cage should be tightened down so that it does not
move by itself when slightly touched. Make sure to adjust the
camera to the desired angle. Usually, the camera should point
slightly downwards in order to get good video footage later on.
ONLY FOR GRAVIT GPS VISION PRO – Gimbal-calibration
Before you use the gimbal of your Gravit the first time, you
should check it to make sure it works in an optimal way.
For a detailed description of your gimbal, please check chapter
„The gimbal“.
IN CASE you should notice that the gimbal is NOT working as
expected, please calibrate the gimbal.
The calibration process works as follows:
1) Make sure that the power-connector of your gimbal is
attached to power-socket of your Gravit like shown in the
photo.
2) Make sure that the two black connectors are plugged onto
the sockets of the gimbal as shown in the photo.
3) Before powering up you Gravit (and with it your gimbal),
make sure that the camera is correctly attached and
secured to the gimbal.
PLEASE NOTE: DO NOT power up your gimbal without a
camera attached to it. Otherwise you may seriously dama-
ge or even destroy the gimbal.
Also make sure, that your Gravit is standing on an even
surface and is not moved while performing the gimbal
calibration.
4) Connect the flight battery to your Gravit and let it initialize.
5) When looking on the gimbal from the left side, you will see
a small, black button on the left side of the gimbal circuit
board (see photo). Press this button once. If necessary,
use a small screwdriver or something similar to reach the
button.
6) After you have pressed the button, the gimbal reboots and
enters calibration mode for a short time.
7) Grab the camera with your hand carefully and aligned the
camera in horizontal and vertical orientation as good as
possible. Keep this position/orientation for a short moment
until you can feel resistance from the gimbal and then
release the camera.
8) Please note that for performing the calibration process (No.
7)), you have only a rather short time frame to do so before
the gimbal enters normal operation mode again. In case
you should miss the time frame and the gimbal should
not aligned properly after the calibration process, please
repeat the procedure until you are successful.
9) Your gimbal is now calibrated and ready to work. Unplug
the battery from your Gravit again. In case the gimbal
should not work properly later on, please repeat the cali-
bration process.
FLIGHT PREPARATIONS
14

Mount your propellers
The propellers of your Gravit GPS are self-tightening propellers
which can only be mounted in one direction. This is a security
feature which prevents the props from being mounted onto the
wrong motor(shaft).
To do this correctly, please have a look at the propellers.
You will see that the propellers are bearing symbols. Those
symbols show you in which direction the propeller is locked
(closed lock icon) and unlocked (open lock icon). The propel-
lers are always mounted in a way that the locking direction is
CONTRARY to the motor rotation direction (which is imprinted
on each arm of the copter near the motor).
For example: If you have a motor which is rotating clockwise
(as indicated by the arrow on this motor‘s arm), then you have
to use a propeller which locking-direction is counter-clock-
wise, and vice versa.
To mount the propeller, just set it on top of the motor-shaft and
rotate it into the appropriate direction until it is fully seated.
The propeller will tighten itself when the motors are started,
you don‘t need to tighten it up manually.
Check the screws on regular basis
During flight operation, your Gravit is in constant movement
and the screws might become lose as a result of this motion,
vibration and strain on the components. This is especially true
for the four screws that hold each of the four motors in place.
Please check the screws on a regular basis. Take special care
of the motor screws and make sure that they are always suffi-
ciently tightened. Also, make sure to tighten the motor screws
in a way that the motor will not grind against the plastic arms
surrounding it. You can check this by manually spinning the
motor with you hand.
Do NOT overt-tighten the screws by using too much force, just
make sure that they are snug.
ATTENTION! Check wireless status of your Gravit’s camera
The wireless action camera of your Gravit is also capable of
2.4 Ghz wireless operation. This functionality is used for trans-
ferring pictures and movies from the camera to your smart-
phone or for configuring the camera via smartphone app.
However, please be aware that the 2.4 GHz signal of the wifi
action cam may interfere with the 2.4GHz signal that your
transmitter is using to operate your Gravit.Therefore, we
STRONGLY ADVISE NOT TO ENABLE the wireless function
of your camera while flying your Gravit. You can enable and
disable the wifi function of your camera by holding down the
“OK” button on top of the camera for a few seconds when the
camera is switched on.
Since the “OK” button of the camera is also used for other
purposes (mainly starting and stopping a recording), please
make sure not to enable the wireless function of your camera
ACCIDENTALLY by pressing the “OK” button for too long.
For a more detailed explanation of all function of your came-
ra, please read the appropriate chapter „The camera“ in this
manual.
FLIGHT PREPARATIONS
15

FRONT
LED
FRONT
LED
LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
COMPASS CALIBRATION
Compass calibration
The compass calibration is NOT necessary before EACH start.
It has to be done only:
a) before your maiden flight
b) when you fly in an area which is hundreds or more kilome-
ters away from your last flying area
c) when you experience strange, uncontrollable flying behavi-
our in a GPS-assisted flight mode during your last operation
d) if your Status-LED keeps on showing a yellow blinking code,
which does not go away even after you have put the Gravit on
different, NON-metal places.
PLEASE NOTE: Also check the connector that goes into the
compass module on your Gravit’s landing feet. If this connec-
tor is not properly seated into the compass module’s socket,
this will also result in a yellow status-LED.
GRAVIT GPS VISION PRO ONLY:
Before performing the compass calibration, make sure that the
gimbal is NOT connected to power. Check the red 2-pin plug
that comes from your gimbal. If it is connected to the socket
coming from the Gravit‘s bodyshell, unplug it for the duration
of the compass calibration. Don‘t forget to plug the gimbal
back in after you did the calibration.
The compass calibration is done as follows (also see pictures):
1) Turn on your Gravit first, then turn on your transmitter. Wait
until the initialization process has been finished (during
initialization, the status LED will continuously blink BLUE-
GREEN-RED—PAUSE—repeat) and the Gravit is blinking
either blue or blue/red (SWA/SWB=Pos.0).
2) Wiggle the right 3-position-switch (SWB) of your transmit-
ter completely up and down quickly until the Status LED of
your Gravit GPS is blinking green rapidly (leave SWB in top
POS. 0 after doing so)
3) Grab the Gravit on the landing feet and hold it straight/hori-
zontally away from you with the Status LED facing you.
IMPORTANT: Be sure NOT to touch the compass, which
is mounted on the lower rear part of the left landing gear
when holding the Gravit. You can also (additionally) grab
around the rear left arm of the Gravit to get a firm grip on
your quadrocopter.
4) Move slowly around your own axis in counter-clockwise di-
rection until the rapidly blinking green Status LED is starting
to blink with short pauses in between.
5) Tilt the Gravit forwards by 90°, so that the front is facing
straight downwards and the Status LED is facing to the sky
6) Repeat step 3) and rotate around your own axis counter-
clockwise until the Status LED is blinking a pattern again
7) The compass has been successfully calibrated. Put the
Gravit back on the ground, the Status LED should now blink
only blue. In case the status LED is also blinking red, please
wait until the red blinking has stopped, indicating that
enough satellites have been found.
8) In case the calibration fails, unplug the battery from the
Gravit, turn off your transmitter and start over again.
16

Preparations
Before you can take-off with your Gravit GPS, you should
make sure that some requirements are met and some preli-
minary procedures have been worked through correctly and
successfully:
The camera mount (or the gimbal mount respectively) has
been secured by black zip ties for transportation. Those zip ties
do NOT necessarily have to be removed. But if you choose to
let them on the mount and your video footage seems unusually
instable or shaky, you should consider REMOVING the zip ties,
as they MAY influence the result of your camera negatively
- In case you plan to use your camera, please make sure the
lens protection foil has been removed from the lens
- Make sure that the connector that goes to your compass is
firmly connected to the compass and has not come loose
during transportation
- Your flight battery should be fully charged and the batteries
of your transmitter should be full
- The battery of your camera should be charged
- Your propellers should be properly mounted and without
defectives
- Your gimbal should be calibrated and working (ONLY
#220721)
- DO NOT POWER UP your Gravit (and thus your gimbal) if
the camera is not attched to the gimbal, as this will dama-
ge the gimbal.
- Your compass should be calibrated and working correctly
- You should have checked your Gravit for any damages or
defectives
- It should not be too windy (flying in strong winds will most
likely result with the loss of your Gravit!)
- It should not be too cold or too hot (flying in extreme tem-
peratures is not recommended)
- It must not rain (your Gravit is not suited for flying in rain,
beware of damages!)
- You should be in a large outside area with no constructions,
houses or people around
- You should be in a place where you are legally allowed to
fly
- You should keep your flight insurance documents with you
(needed in many countries, please check)
- You should know the special functions of your transmitter
(especially the function of SWA and SWB)
- You should be familiar with the status-LED and its blink-
codes
- Both of your transmitter switches should be in Pos. 0 (top).
Experienced pilots can handle this differently on their own
risk)
- Your throttle control stick (left stick) should be completely
down
- The WiFi of your camera MUST BE disabled!
- You should be comfortable to fly quadrocopters (and in case
you are NOT, you should have someone at your side who is
and who can assist you)
- You should have a decent, even, unobstructed take-off area
from which to take off from.
Before taking off with your Gravit, have a close look at the
status-LED on the rear side of your Gravit. The following
blinking codes should PREVENT you from starting and require
further actions to be taken before you can take off:
- Fast red flashes This means that the battery is depleted,
check battery voltage
- Intermittent 2 red flashes Your Gravit has not yet ac-
quired full satellite lock
- Long, yellow flashes The compass of your Gravit is not
working properly (see chapter “Compass calibration”)
- Long, red flashes The IMU (Inertial Measurement Unit)
does not work properly (see chapter “Software“ and MA-
NUAL IMU- and TX-calibration)
Before you take off your Gravit, make sure you have read
through the chapter “Take off-preparations”.
To take off, please do the following:
1) Put your Gravit on the ground and connect the flight battery
2) Tuck the battery wires away inside of the battery compart-
ment and close the battery compartment
3) Turn on your transmitter
4) Wait until the Gravit has gone through the initialization
process
5) Make sure that the status-LED of your Gravit does NOT
show an undesired LED-blining code (see chapter “The
status LED”).
6) With your two transmitter-switches SWA and SWB being
in the top position Pos. 0 (which we recommend for taking
off), please wait for the red blinks to disappear, indicating
that your Gravit GPS has acquired full GPS-lock.
7) If you want to make use of your camera (start a recording,
for example), please make sure to make all the settings
now, BEFORE you arm and start your motors (for details on
your camera’s functions, please read chapter “The came-
ra”)
TAKE OFF - PREPARATIONS AND TAKE OFF
17

LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
BASIC FLIGHT OPERATION
8) Once your Gravit’s status-LED is blinking blue only, bring
the control sticks of your transmitter to the inner lower
position (left stick to 5 o’clock and right stick to 7 o’clock)
to arm and start the motors to idle speed.
Please note: If you do not raise the throttle within 2 se-
conds after arming the motors, the motors will stop again
and you have to repeat the procedure.
9) Raise the throttle stick to around 80% to have the Gravit
take-off quickly, then lower the throttle stick if needed
until the Gravit hovers in the air. We recommend applying
throttle NOT TOO slowly, the Gravit might become unstable
and tip-over if you do so.
10) Let the Gravit hover in the air at a safe height and distance
(around 5 meters) until you are sure that everything works
fine and you are in control of your Gravit
11) Enjoy your flight!
Basic Flight Operation
As soon as you have your Gravit up in the air, you can take
full control and fly it around. This chapter will cover the basic
flight maneuvers, like flying up and down, forward and back-
ward and sideways.
To read about more advanced flight maneuvers and functions,
please refer to the chapter “Advanced Flight Operation” and
“The flight modes”.
PLEASE NOTE: Your Gravit is equipped with a feature called
“Geo-Fencing”. This feature limits the maximum height and
horizontal distance that your Gravit can fly away from the
start position. EX WORKS, your Gravit is limited to 50 m of
height and 150 m in horizontal distance, so keep this in mind
when flying. However, those limits can be changed within the
software of your Gravit (details see chapter “Software”).
Throttle control
By moving the left control
stick up- and downwards,
you control the thrust of your
Gravit. The lower the stick, the
lower the thrust and vice versa.
Depending on the amount of
thrust you are providing with
your throttle control, the Gravit
will either climb or decline.
If the control stick is set to neutral/middle position, the Gravit
will hover at its current flying height in the flight modes
ALTITUDE and GPS (position-hold) ,check chapter The flight
modes”. For all other flight modes, leaving the throttle stick
at neutral will NOT result in triggering automatic altitude-hold
controlled by the altimeter. Instead, the motors will simply
apply exactly half of their maximum thrust, which will usually
result in the Gravit holding its height MORE OR LESS (depen-
ding on the flight situation).
Yaw control (rudder)
When moving the left control
stick to the left and right, the
Gravit will rotate around its own
axis in the corresponding direc-
tion, your Gravit is “yawing”.
The further the stick is pushed
to either side, the faster the
movement will be.
Pitch control (elevator)
When moving the right stick
forwards or backwards, the
Gravit will either fly forwards
or backwards, it will “pitch”
towards the corresponding
direction.
The further you push the stick
to either direction, the fast the
Gravit will fly.
Roll control (aileron)
When you push the right stick
to the left or right, the Gravit
will fly sideways into the
corresponding direction, it will
“roll” to this side. The further
you push the stick, the faster
18

the movement will be.
Of course, all of those maneuvers can be combined together
to more complex flight maneuvers, like for example flying a
circle, or flying up and forward at the same time.
IMPORTANT: As soon as the battery of your Gravit is depleted
beyond a certain voltage, the status LED of your Gravit will
start to blink red very quickly. It is now time to bring your
Gravit back home.
Keep an eye on your status-LED
While flying, always keep a close eye on the status-LED of
your Gravit.
The status-LED will tell you anytime if everything is ok and
which flight mode you are currently using. For a detailed listing
of all the status codes, please see chapter “The Gravit GPS,
The Status-LED”.
There are 3 status codes, which should specifically catch your
attention and which require appropriate actions to be taken:
1) Low-voltage-warning
If the status LED is starting to emit a series of fast, red
blinks, then your LiPo is beginning to become depleted. You
should slowly start to land your Gravit without any further
delay (see chapter „Landing your Gravit“).
PLEASE NOTE: It may happen that the low-voltage-
warning is kicking in to early if you fly maneuvers that put
a lot of strain on the Gravit’s propulsion. For example, if
you hover in the air and the suddenly apply full throttle, the
low-voltage-warning may kick in shortly, although you are
still good to go for a while. In this case, you may continue
to fly. But watch out for the low-voltage-warning at any
time and if it is constantly showing up, it is about time to
bring your Gravit back home.
PLEASE NOTE: Depending on the flight mode you are
using at the moment the low-voltage-warning is triggered,
the Gravit behaves differently: For BALANCE and ALTITUDE
mode, the Gravit will CONTINUE to fly until the second low
voltage warning kicks in. When flying in GPS-mode, the
Gravit will instead initiate a “Return-to-home” and fly back
to its take-off position. When the second warning kicks in
for BALANCE and ALTITUDE mode, the Gravit will either
return to home OR auto-land, depending on your software
settings (see chapter “Software”).
2) Compass error
Whenever your compass is not working correctly, the
status-LED will give out long yellow blinks.
When you receive this warning code, do not panic. During
flight, especially when flying very tight and fast maneu-
vers at high speed, it might happen that the compass is
SHORTLY “out of bounds” and the status-LED comes up
with a yellow warning signal. In this case, stop your Gravit
in the air and watch the status-LED. Most likely, it will stop
to give out the yellow error code within a second or two
and you can continue to fly.
Only in case the yellow warning code is continuously (or
repeatedly) showing up, you should ground your Gravit and
check your compass (see chapter “Compass calibration”).
3) GPS-error
As soon as you notice two short, intermittent RED blinks
on the status-LED of your Gravit, beware. This means that
your Gravit has lost full satellite lock and you cannot use
any flight modes that rely on GPS-assistance (like return-
to-home, GPS-mode, and others).
IN CASE you are NOT planning to use any GPS-assisted
flight functions, you may continue to fly without any wor-
ries. However, we do NOT suggest doing so, as the return-
to-home and fails safe feature of the Gravit are also NOT
working in this condition. So keep in mind that you are
flying at your own risk while not having full satellite lock.
BASIC FLIGHT OPERATION
19

0,5m
LRP GRAVIT GPS VISION 2.4GHZ F.H.S.S.
LANDING YOUR GRAVIT
To land, you can basically choose between 3 different
methods:
1) You bring down the Gravit manually:
If you want to land your Gravit manually, please make sure
that you try to land on an even and flat surface. If you try to
land on a stony or uneven surface, you risk that your Gravit
is tipping over during the landing procedure and becomes
damaged.
Take your time and bring down the Gravit very slowly. Try
to keep it as steady and horizontal as possible and decre-
ase the height step by step in the last few meters. After
you have landed your Gravit successfully, hold down the
left control stick completely and the motors will shut off a
few seconds later. In case there should be no flat and even
surface around, we recommend to „catch-land“ your Gravit
instead, see 2)
2) You „catch-land“ your Gravit:
„Catch-landing“ is just what it sounds like: You do not land
your Gravit on the ground, but bring it close enough to you
to grab the landing feet while the Gravit is in the air and
then you stop the motors. The big advantage of catch-lan-
ding is that it can be done everywhere. It does not matter
whether you are standing in high grass or rocky hills. Since
your Gravit does not have to come down to the ground,
the quality and condition of the landing surface does not
matter. The second advantage is that you do not risk any
damage on your Gravit due to potential tip-overs when
attempting to land „normally“ on the ground. However, if
you decide to catch-land your Gravit, beware of getting hit
by the spinning propellers!
To do the catch-landing correctly, do as follows:
a) Bring down your Gravit around 0,5 meters ABOVE your
head. This is very important because in case the Gravit
suddenly drifts away in any direction (because of a gust of
wind, for example) you won‘t get hit by the Gravit because
it will fly/drift OVER your head.
b) In case that there should be a noticeable or even strong
wind: Approach the Gravit with the wind in your BACK,
NOT in your face. By doing so, you can avoid the Gravit
is accidentally being pushed TOWARDS you by the wind.
Instead, if you approach it with the wind in your back, the
Gravit is pushed AWAY from you.
c) Grab one landing feet on its VERTICAL part, as closely to
the bodyshell as you can get and hold it firmly. Do NOT
touch the compass on the rear left landing feet during this
procedure.
d) Move the throttle stick completely downwards. Keep on
holding the Gravit up in the air above your head UNTIL
the rotors stop spinning. Now it is safe to put the Gravit
anywhere you want.
A few words on catch-landing:
- It is easier to completely lower the throttle with one hand
and catch the Gravit with the other hand if you use a neck-
strap for your transmitter. By doing so, single-handed trans-
mitter operation becomes much more reliable and easier,
because you don‘t have to physically hold the transmitter
with your hand.
- If you fly with another person, ask this person to help you
catch-land your Gravit. If one person operates the control
sticks and a second person catches the Gravit, this second
person may use BOTH hands to do so, making this procedu-
re even more safe and reliable.
However, please make sure that this person feels comforta-
ble in doing so and knows what he or she is doing.
- Make sure that you only move your Gravit as little as
possible while holding it in the air during the catch-landing
procedure. Keep in mind that every movement you make is
being recognised by the Gravit‘s electronics and is being
countered by the corresponding maneuver-attempts.
This can be confusing or suprising and lead to false behavi-
our of the person who is catch-landing.
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