GRAUPNER Hott Alpha 250Q User manual

User Manual
Alpha 250Q Race Copter User Manual
No: 16520.HoTT and 16520.RTF

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TABLE OF CONTENTS
...................................................................................................................................................................... 0
Introduction ..................................................................................................................................................2
Service centres.............................................................................................................................................. 2
Symbols Explanations ...................................................................................................................................2
Safety notes .............................................................................................................................................. 2
Product Features........................................................................................................................................... 4
Alpha 250Q Specifications ............................................................................................................................4
Flight Preparations........................................................................................................................................5
Alpha 250Q RTF Preparations ................................................................................................................... 5
Alpha 250Q RFH Preparations .................................................................................................................. 6
Propeller Installation................................................................................................................................. 6
BEFORE FLIGHT Safety checklist....................................................................................................................7
Your First Flight ......................................................................................................................................... 7
Telemetry (RTF).........................................................................................................................................8
Fail Safe.....................................................................................................................................................8
MZ-12 Radio setup........................................................................................................................................8
GR-18 FLIGHT CONTROLLER........................................................................................................................10
Intended Use........................................................................................................................................... 11
MULTICOPTER Installation......................................................................................................................11
Features ..................................................................................................................................................12
Technical Data.........................................................................................................................................12
Connections ............................................................................................................................................12
Receiver settings..................................................................................................................................... 13
Transmitter Setup ...................................................................................................................................14
Main settings...........................................................................................................................................14
Axis assignment.......................................................................................................................................16
Roll and Nick PID settingS .......................................................................................................................17
Yaw PID settings......................................................................................................................................18
GR-18 Firmware Update .........................................................................................................................19

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INTRODUCTION
A new generation of race copters has arrived! The Graupner Alpha
250Q has been designed ready to fly right out of the box! No complex
setup or building required. Just charge your batteries and the Alpha
250Q is ready for some wild racing!
The Alpha 250Q is built around a strong 3mm lightweight carbon
competition frame, making it extremely durable during all flight phases.
Parts are easily replaced as needed, requiring only basic tools. To
assist with orientation during flight, a set of high intensity LED lights
are mounted fore and aft. The Alpha 250Q is supplied with Graupner
high efficiency C-Props which have been designed from the ground
up to deliver better performance, less noise and longer flight times.
SERVICE CENTRES
Graupner USA OPENHOBBY LLC
3245 University Ave. Suite 1520
San Diego, CA 92104
United States
Service Hotline
[phone]
Mon Fri 9:00 am 4:00 pm PST
[email protected]
For online support visit us at www.graupnerusa.com or at one of our
forums at www.rcgroups.com
SYMBOLS EXPLANATIONS
Always pay attention to information marked with the CAUTION or
WARNING symbol. WARNING indicates the potential for serious injury,
the signal word CAUTION indicates potential minor injuries.
The NOTE indicates important information that should alert you to
potential property damage.
Safety notes
WARNING
These safety instructions are intended not only to protect the
Therefore please read this section very carefully before using
the product!
Do not leave the packaging material lying around, this could
be a dangerous toy for children.

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Persons, including children, with reduced physical, sensory or
mental capabilities, or lack of experience or knowledge, or not
capable to use safely this product, must not use it without
supervision or instruction by an experienced and responsible
person.
The operation of radio controlled models must be learned! If
you have never used such a model, then start extra carefully
and make sure to be familiar with the reactions of the model
to the remote control commands. Proceed responsibly.
Always perform a range test and function test on the ground
(secure the model tightly) before your model is used. Repeat
the test with the motor running and with short bursts of
throttle.
Before you start using the remote control model, you have to
check any relevant laws and regulations. These laws must be
always obeyed. Pay attention to the possibly different laws of
the countries.
The insurance is mandatory for all kinds of model operation. If
you already have one check out whether the operation of the
model is covered. If applicable, extend it to special model
liability insurance. We recommend to provide the multicopter
with a label, where are indicated the name, address, tel. n., E-
mail and Insurance n. So that the multicopter can be clearly
assigned in the event of a crash.
For safety and (CE) certification the unauthorized conversion
and / or modification of the product is not permitted.
They may only be used with our recommended components
and accessories. Use only genuine matching Graupner
connectors of the same design and the same material.
Make sure that all connections are secure. Do not pull on the
cables when you unplug the connector.
Protect the model and receiver from dust, dirt, moisture and
other foreign parts. Do not expose this equipment to vibration
and excessive heat or cold. The remote control operation may
range from -10 ° C to +55 ° C.
Use all HoTT components only with the latest software and
firmware releases.
If any questions arise that cannot be ascertained with the help
of the operating manual, please contact us.

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WARNING
Always disconnect ALL of the propellers when setting up your radio or
receivers to avoid serious injury by turning propellers!
Check the receiver regularly for damages to the housings and cables after
every flight. Damaged or wet electronic components, even if re-dried,
should no longer be used.
PRODUCT FEATURES
The Alpha 250Q racer comes in two different versions.
FEATURES
RFH
RTF
Fully assembled Alpha 250Q
Yes
Yes
Aluminum Carrying Case
Yes
Yes
Graupner C-Props (2 sets)
Yes
Yes
mz-12 6ch telemetry radio
Yes
LiPo battery charger
Yes
3S 1500 mAh LiPo battery
Yes
AC Power cable
Yes
ALPHA 250Q SPECIFICATIONS
Expertly built no assembly needed
Integrated triple mode receiver and flight controller
Selectable flight modes (beginner to expert)
Receiver with out-of-the-box built in telemetry (altitude,
voltage, RF signal strength, Rx temperature)
Live voice telemetry announcements of flight data
Warning voice notifications of battery level, radio range and
assigned maximum altitude
Over the air access for copter setup with any Graupner HoTT
radio (6ch and up)
No computer or setup boxes needed to configure or operate
Powerful, lightning fast response Graupner Ultra 2300Kv
motors
Graupner high performance copter C-Props

Strong 3mm carbon motor frames and 2mm carbon chassis
Heavy duty aluminium carrying case for radio, copter and
equipment transport
Carbon vibration free camera mount

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High intensity LED light system
External JST power bus for FPV equipment
FLIGHT PREPARATIONS
Your Alpha 250Q comes pre-assembled and all settings on the flight
s
have been pre-wired and their rotation direction have been set at the
factory.
Alpha 250Q RTF Preparations
Do not attach the propellers until instructed!
1. Charge the 3S LiPo battery using the supplied LiPo Balancer
Charger S2015 by inserting the rectangle balance plug from
the battery into the charger 3S (11.1V) balancing port.
Charging may take up to 10 hours depending on the state of
the battery.
2. Install the supplied AA batteries into the mz-12 radio and
check its operation by turning it on.
3. Before attaching the 3S battery to the Alpha 250Q make sure
that the throttle stick is all the way down and that switch S1
on your mz-12 radio is switched off (pointing towards you).
Switch S1 is your throttle on/off switch acting as an added
safety for accidental motor activation.
4. After attaching the battery a range of beeps will be heard
indicating that the motors are armed and ready for operation.

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When attaching the battery make sure the Alpha 250Q is not
moved for at least 4-5 seconds to allow for gyro initialization.
5. To test proper operation of the motors turn switch S1 to the
on position and slowly push the throttle stick until the motors
start spinning. At any time you can turn the motors off by
pulling the throttle stick towards you or switching S1 to the off
position. For extra safety make sure that switch S1 is in the
off position before handling the Alpha 250Q.
6. If all motors were turning and the throttle and switch S1
functioned properly your Alpha 250Q is ready for use.
Follow the instructions on propeller installation.
Alpha 250Q RFH Preparations
Do not attach the propellers until instructed!
1. Make sure you have a fully charged 3S 1500 mAh battery with
a 35C discharge rate or more.
2. Setup your Alpha 250Q as ACRO 1A model and assign a
throttle hold switch to safeguard the throttle stick from
accidental motor activation. Also assign a two position on/off
switch to channel 5 for your flight conditions (Attitude/Rate)
mode.
3. Before attaching the 3S battery to the Alpha 250Q make sure
that the throttle stick is all the way down and that your throttle
hold switch is active.
4. After attaching the battery a range of beeps will be heard
indicating that the motors are armed and ready for operation.
When attaching the battery make sure the Alpha 250Q is not
moved for at least 4-5 seconds to allow for gyro initialization.
5. To test proper operation of the motors turn off your throttle
hold switch and slowly push the throttle stick until the motors
start spinning. At any time you can turn the motors off by
pulling the throttle stick towards you are turning your throttle
hold switch to the off position. For extra safety make sure that
the throttle hold switch is in the off position before handling
the Alpha 250Q.
6. If all motors were turning and the throttle and switch S1
functioned properly your Alpha 250Q is ready for use.
Propeller Installation
Please make sure that during the propeller installation there is no active
power source attached to the Alpha 250Q to avoid serious injuries to
yourself or those around you.

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The Alpha 250Q comes with two sets of propellers that are designed
to either turn clockwise or counter clockwise. Each set has its own
colour and it does not matter which colour you choose for the rear or
the back for as long as you keep in mind the rotation direction of each
propeller. The propeller size and rotation direction L/R can be read
from the propeller blades.
Position the Alpha 250Q facing backwards and install the propellers
as follows;
Front left motor: 5 x 3 L
Front right motor: 5 x 3 R
Rear left motor: 5 x 3 R
Rear right motor: 5 x 3 L
It is important to tighten the propeller nuts to ensure they w come
loose during flight!
YOUR ALPHA 250Q IS NOW READY FOR RACING!
BEFORE FLIGHT SAFETY CHECKLIST
Choose a wide open space such as a soccer or baseball field.
obstacles such as trees and electrical light poles.
Before attaching the battery always make sure that the throttle
hold is in the ON position and that your throttle stick is always
pointing backwards (towards you).
Always do a radio range check (check your radio manual how
to perform a range check)
Makes sure that the flight mode switch is in attitude mode
Your First Flight
Flying the Alpha 250Q is very easy but you should be aware that it can
accelerate very quickly so be ready to provide the proper stick inputs
to slow it down. If you have no flying experience you should consider
have an experienced RC pilot with you especially at the first flights.
Move your throttle hold switch to the OFF position (forward) and slowly
start moving the throttle forward.
Pay attention to the copter behaviour! If you see that it starts rotating
already close to the ground in an unpredictable way you will need to
check if your propellers were attached correctly.
After the Alpha 250Q has lifted from the ground bring it to a 2-3 feet

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In case the Alpha 250Q is not hovering at a level flight attitude you
should check the neutral position of the trims or perform a new level
calibration (this is explained in the GR-18 flight controller section.
Build up some experience flying the Alpha 250Q before switching from
Attitude mode to Rate mode. In rate mode the Alpha 250Q becomes
very responsive and you can perform aerobatic maneuverers such as
rolls and loupes.
Telemetry (RTF)
Your Alpha 250Q flight controller provides real-time flight information
which is helpful during flight and also increases overall safety. On the
mz-12 radio the trainer switch has been pre-programmed to provide
a range of telemetry information that can be called at any time during
flight. In order to hear telemetry voice announcements a headset or
ear piece needs to be plugged into the back of the mz-12 DSC port.
Telemetry announcements are triggered and cycled by using the
trainer switch.
Fail Safe
In the event that radio communication between the transmitters is
failing the Alpha 250Q will automatically reverts to a pre-set setting that
throttles back the power to avoid uncontrolled and potential
dangerous flight.
To change and modify fail safe settings you should consult your radio
manual.
MZ-12 RADIO SETUP
The mz-12 already comes pre-configured and optimized for the Alpha
250Q. In case you are interested to make changes or setup your own
model you can take below settings as starting point.
STEP ONE: Go to the “model mem.”
menu and select a new model and
give it a distinct name.

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STEP TWO: Go to the “m.type+quick”
menu and select “model type”. Setup
the motor at C1 to “idle re.” and the
cutoff switch (motor on/off) to S1.
Also note the model settings
STEP THREE: Go to the “cont. sett.”
menu and assign channel 5 to switch
S3 to control attitude and rate mode.
STEP FOUR: Go to the “D/R expo”
menu. Setting a bit of expo will make
control a smoother for the beginner.
You can change settings later.
STEP FIVE: Go to the “RF sett.” menu.
Set stick mode to 2 and the timer for 5
minute flight. The timer is activated
with switch S1. In this menu you also
need to bind your RX to the new
model created.
STEP SIX:Go to the “basic sett.” Menu
and make the changes as shown on
the right image. The Jack select is set
to EAR to provide a connected
headset with voice telemetry data.

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Other Graupner radio models may have similar settings depending on
user preferences. Please check the Graupner websites and support
forums for available models. In any case always consult your radio
manual first to ensure proper use of the many available setting options.
GR-18 FLIGHT CONTROLLER
The GR-18 receiver provides three axes stabilization for airplanes as
well as flybarless control for helicopters. The GR-18 receiver also
provides real-time telemetry information of altitude, signal quality,
temperatures and receiver voltage when using a Graupner HoTT radio.
This document describes only the multicopter software update which
will convert the GR-18 receiver into a multicopter controller. After the
update the airplane and helicopter mode will be disabled but can be
restored after updating the GR-18 receiver with the proper software.
After the update your GR-18 receiver can control the following
multicopter setups.
Quad X, Quad +, Hexa V, Hexa I, Tri L, Tri R.
The GR-18 controller has two build in flight modes to enable different
flight responses to your multi-multicopter. The GR-18 controller is also
very easy to setup and requires minimal wiring and configuration. All
multicopter related settings can be done directly from your Graupner
HoTT radio using the over-the-air HoTT transmission. No computer or
configuration boxes are needed during setup and installation!
To activate the multicopter functions on the GR-18 a firmware update
is needed. The firmware update procedure can be found near the end
of this document.
The GR-18 is one of the most advanced and most capable 2.4 GHz receivers
on the market. To ensure safe operation you must read this user manual
and the safety notes before using this product!
NOTE
This manual is part of that product. It contains important information
concerning operation and handling. Keep these instructions for future
STEP SEVEN: Go to the “fail safe”
menu and review the fail safe setting
for your new model. Never fly without
having your fail safe settings stored
on your radio system. Please read
your manual carefully as to how to
use and setup this important setting.

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reference! Take this into consideration when you pass it on to other
future owner.
Intended Use
The GR-18 can also be used to control airplane and helicopter models.
To do so you will need to perform a firmware update which can be
downloaded over the internet at www.graupnerusa.com or
www.graupner.com. You also need to download the accompanying
manual describing airplane and helicopter use with the GR-18 flight
controller. More detailed information can be found in the technical data
section. The receiver is designed exclusively to be used in a battery-
powered, radio controlled model, any other use is not allowed.
For any improper use no warranty or liability isaccepted. Read through
this manual to familiarize yourself with the product before you attempt
to program or setup the receiver. Graupner constantly works on the
development of all of its products. We reserve the right to change the
product, product functionality and capabilities.
This receiver is not a toy. It is not suitable for children under the age of
14. The installation and operation of the controller must be performed
by experienced modellers. If you do not have sufficient knowledge
about operating radio-controlled models, please contact an
experienced modeller or a model club.
MULTICOPTER Installation
The receiver must be placed in line with one side of the Multicopter.
Secure it to a flat protected space. The bottom of the receiver must
always be parallel to one of the multicopter sides. Secure the receiver
with high quality double-sided tape to reduce any vibrations that may
affect accurate operation of the receiver.
Binding
The binding is only possible if the receiver has not yet been bound to
another transmitter (red LED blinks). Pushing the SET button the
receiver will be set in Bind mode.
If you want to bind an already bound receiver to another receiver,
follow the next steps:
Turn off the RF module in the
your radio manual)
Switch on the receiver and push the SET button to bring it to
bind mode. Press bin menu.
When the red light turns off and the green LED light turns on,
the binding was successful.

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properly. In this case repeat the above procedure.
Features
Multicopter stabilization on 3 axes
Natural flight performance
Excellent stabilization for aerobatic figures
Easy setup of the PID gyro settings
Over-the-air setup by using Graupner HoTT radio
Altimeter sensor for vario and altitude
Technical Data
Operating temperature: - 15..+70 °C (-15° 70° C)
Dual full range antennas: 145 mm
Total weight approx.: 14 g
Frequency: 2400 ... 2483.5 MHz
Range approx.: 4000 m
Dimensions ca.: 46 x 21 x 14 mm
Modulation: 2.4 GHz FHSS
Current consumption: 70 mA
Operating voltage: (2,5) 3,6 ... 8,4 V
Connections
The connectors are polarised: note the small chamfers on one side.
Never use force! The connectors should be inserted gently. The
polarity is also printed on the receiver; the negative wire (-) is brown or
black, the positive wire (+) is red and the signal wire is orange or white.
The socket for channel 8 (K6 in GR 18) can also be programmed to
provide a (digital) sum signal (see next section).
Battery Power
The receiver does not have a specific socket for connecting the
battery. We recommend that you connect the power source to the
socket(s) close to the servos already connected to the receiver. If you
wish to connect multiple separate batteries, the batteries must be of
the same nominal voltage and capacity. Never connect batteries of
different type, or packs with a different state of charge as this can
cause a short-circuit. If you encounter this problem, we recommend
the use of a voltage stabiliser unit (e.g. PRX-5A receiver power supply,
Order No. 4136) between the batteries and the receiver.
Telemetry or channel (T/9) socket
The optional telemetry sensors are connected to the socket marked
- Telemetry. In addition, the firmware update is performed on
this socket (see below). The socket can also be used as an additional
channel (see below).

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Receiver settings
Accessing the GR-18 settings menu can be done via the
TELEMETRY/SETTINGS & DATA VIEW. The method of accessing this
menu is described in the operating instructions supplied with your
radio.
Low-voltage warning (ALARM VOLT)
If the receiver voltage falls below the set value, a low-voltage warning
a regular beeping at a rate of about one per second; alternatively the
Temperature warning (ALARM TEMP)
If the receiver temperature exceeds the set temperature threshold, a
t a rate of about one per second;
Maximum altitude (Max. altitude)
At this point you can enter a maximum altitude, at which an alarm is
triggered, either via the transmitter in the form of the
actual height is adopted as zero when the receiver is switched on; the
indicated height is therefore the altitude relative to the launch point
ground.
Cycle time (PERIOD)
If your system is used exclusively with digital servos, you can set a
cycle time (frame rate) of 10ms at this point. If your system includes
some or all analogue servos, you should always select 20ms, as many
analogue servos cannot process the higher frame rate, and may
connecting
HoTT sum signal (SUMD)
If you activate the digital sum signal at channel 8, a sum signal
containing eight channels is present at this socket, instead of a servo
signal. The HoTT receiver configured as SUMD constantly generates
a digital sum signal from 8 control signals from the transmitter and
makes this signal available at the appropriate servo socket. This type
of signal is used by several of the latest electronic developments in the
area of flybarless systems, heavy-duty airborne power supplies, etc.
Telemetry sensor (sensor at CH9)

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This socket allows you to use it either for telemetry or for an extra
channel (9). (Note: Using both at the same time is not possible!)
Switching is done in this menu item.
receiver channel 9.
Gyro Initialization
After switching on your multicopter, the gyro is already active but not
yet initialized. To initialize it, hold the Multicopter still after switching on
preferably on a flat surface. The calibration will be done only when the
receiver is completely still. After approximately three seconds you will
hear beeps emitted by all motors. The signal tone can vary depending
on the ESC model. The beeps will stop when the calibration and
initialization is complete. Wait until the initialization is complete before
you start the model! The motors will not start until the calibration is
complete.
Transmitter Setup
Before flying your multicopter you will need to make certain radio
settings. First, create a new model setup as airplane, single aileron.
For safety reason we highly recommend to have a switch or control
configured as a throttle HOLD function that when active disables the
throttle from accidental stick movements. For additional information as
to how to setup a throttle HOLD consult your radio manual.
The GR18 controller provides two flight modes to control your
multicopter which is fixed to channel five on the receiver. You will need
to setup a two-way switch for channel five in order to control the flight
modes.
Attitude mode: Channel 5 = -100% to 0%. The stick movement
determinates the Multicopter reaction on Roll and Pitch (Nick). It allows
a maximal angle of about 50° at 100% of stick movement. This mode
is highly recommended for beginners. The stick movements acts
directly proportionally to Roll and Pitch (Nick).
Rate mode: Channel 5 = 0% to +100%. The stick movement
determinates the rate without limit. This aerobatic mode allows rolls
and loops.
Main settings
TYPE
Quadro x, Quadro +, Hexa I, Hexa V,Tri L, Tri R
Make sure that your channel connections to the receiver are correct
for the selected multicopter type. Also note the proper motor and
speed controller direction as seen from the top. In case of tri-
multicopter use only a digital servo for servo 4 (channel 4).
STEP ONE: Setup your transmitter for
throttle hold and flight mode –
Attitude or Rate mode
STEP TWO: Select your multicopter
type and calibrate the ESC’s. Make
sure that your propellers are
disconnected from your motors!

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MODE
Before you can use your multicopter you will need to calibrate your
throttle in order for the GR-18 to learn the max and min range of your
throttle channel. In order to do so set the controller mode from
NORMAL to ESC SET and go back to your transmitter main menu
and turn the receiver off and on. Now perform the ESC calibration as
described by your ESC manufacturer.
When the calibration has been successfully completed you should
from ESC SET to NORMAL .
Note: For safety reason the Type and Mode changes take effect after
switching off and on the GR-18 receiver. Which consequence this
parameter has to gas curve, will be explained in next section.
MINPOWER %
This setting is used to prevent the motors from shutting down during
flight when throttling all the way back. To accomplish this you will need
to create a throttle curve (consult your radio manual how to access
and create curves) and make a curve where the motors start turning
at <- set the curve any higher as it would limit the GR-18
controller capabilities.
LOGGING

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The GR-18 can log important flight data to any HoTT radio equipped
with an SD memory card. Setting one is the default for telemetry log
settings.
Selectable Values:
0 = No logging
1 = Roll and Nick logging
CALIBR. POSITION
To assure a stable and level flight in attitude mode the sensors need
to be calibrated. To calibrate the sensors place your multicopter on a
level surface and set the value to Yes. After a moment, it jumps back
to No and calibration is completed. Do not forget to store this new
setting which is done by unselecting the field!
Axis assignment
SETUP
Depending on the way you installed your GR-18 it must now learn
proper flight orientation in order to respond properly to the radio
steering commands.
ment
set it to YES . Now assign the axes as follow:
On the transmitter, briefly move the roll (aileron) stick briefly fully to the
right and verify that the ROLL axis is highlighted. Roll the Multicopter
more than 45 degrees to the right until the ROLL axis field is no longer
highlighted which indicates the identification of this axis is complete.
Now do the same for pitch (NICK) on the transmitter by pushing your
pitch stick (elevator) briefly fully forward and verify that the NICK axis
is highlighted. Tilt the Multicopter more than 45 degrees forward until
the field is no longer highlighted which indicates the identification of
this axis is complete.
Finally complete the procedure for the rudder (YAW) on the transmitter
by moving the rudder stick briefly and fully to the right and verify that
the YAW axis is highlighted. Rotate the Multicopter so that the nose
rotates more than 45 degrees to the right until the field is no longer
highlighted which indicates the identification of this axis is complete.
The gyros and flight orientations have now been assigned.
To verify proper operation of your Multicopter you can test it as follows;
Make sure that all propellers are removed from your Multicopter!
Throttle up approximately 30% of power and verify that all motors
run at the same speed.
STEP THREE: Teach your multicopter
proper flight orientation

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Tilt the Multicopter in Attitude mode so that its nose is facing
downwards. You should notice that the front motors are turning
faster than the rear ones
Roll the Multicopter in Attitude mode to one side. The motors of
the side, in which the Multicopter is tilted will run faster than the
motors on the opposite side.
If one of the directions of operation is wrong, you must repeat the
axis assignment process.
Congratulations!
Your Multicopter is now ready to go! Carefully install the propellers and
find a suitable place to fly and test your Multicopter. Find a place with
plenty of open space and practice some hovering and forward flight
manoeuvres in Attitude mode.
Roll and Nick PID settingS
FOR ATTITUDE AND RATE MODE:
ROLL/NICK P:
Set this parameter in steps of 5 and higher until a medium-speed
overshoot occurs. Then go 5-10 steps back in order to prevent a up
climb at full throttle.
ROLL/NICK D:
Now adjust the D component in steps of 5, until the Multicopter
engages exactly on nick and roll. A too high value may cause high
oscillations.
ROLL FACTOR %:
Set the Roll setting as percent value of the overall gain. For symmetric
Multicopters the value can be 100. If, because of its centre of gravity,
the Multicopter is more agile on the Roll axis than on the Nick axis,
then you can change here the roll factor. In the Graupner ALPHA
RACE 250Q this value is set about 65%.
POWER2SENS:
Very strong motor drives can lead to oscillating at full throttle. This
parameter allows you to set a kind of gyro suppression. Higher values
result in an increased gyro suppression towards full throttle.
ONLY FOR ATTITUDE MODE:
ROLL/NICK I:
Set the I component of the Attitude mode. At too low values the
Multicopter may swing slowly. If it stops after a roll or pitch command
STEP FOUR: These are optional
settings which should be changed
with care and only after you have
familiarized yourself with your
Multicopter flight performance.

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AGILITY:
Agility determines at what speed (yaw rate) a new position is occupied.
ONLY FOR RATE MODE:
R/N RATE I:
Sets the I component of the rotation in rate mode. At too low values
the Multicopter may swing slowly. However, it it stops after a roll or
RATE:
Sets the maximum rate of rotation in Rate mode.
Yaw PID settings
Yaw P - Factor
Standard setting: +45
The P factor is responsible for a harder snap to yaw. Higher values
result in a faster engagement. At too high P values the Multicopter
the value must be reduced.
Yaw I - Factor
Standard setting: +15
The I-factor ensures constant rotations. Start with low values and
increase only as long as the rotations are constant. A too high value
can cause an oscillation when stopped and the motors may run at
higher RPM. This can lead to an undesirable climb.
Yaw D - Factor
Standard setting: MIN
The D-factor affects the stopping behaviour in yaw. In most
Multicopters a hard D response is desired. The D component must be
set as low as possible, since it affects the whole system.

INNOVATION & TECHNOLOGY
REV 1
19
GR-18 Firmware Update
using a PC running Windows Vista, 7 or 8. You will also need a USB
interface (order no. 7168.6) and adapter lead (order no. 7168.6A or
7168.S), which are available separately. Please note that some of the
mz, mx and mc series radios already contain the complete cable set
to perform firmware updates.
You will need the latest Firmware Update Studio program which can
be downloaded from www.graupnerusa.com or www.graupner.com.
Connect the adapter lead to the USB interface (order no. 7168.6). The
connectors are reverse polarity protected: note the small chamfers on
the sides. Never use force the connectors should engage easily.
connectors are reverse polarity protected: note the small chamfers on
the sides. Never use force the connectors should engage easily.
Follow the online instructions for installing the Firmware Update Studio
and after the installation and start-up verify that the right COM port is
selected. To update your gyro receiver firmware scroll down to the
bottom and select
A program window will now appear in which you should first set the
note down the COM por
port, you will be alerted to this when you read out the receiver data).
Datei .
When the file has loaded, click on start...