PowerBox Systems Royal SRS User manual

Instruction Manual
royAl Srs

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PowerBox-Systems − World Leaders in RC Power Supply Systems
Dear customer,
We are delighted that you have decided to purchase the PowerBox Royal SRS power supply from
our range.
We hope you have many hours of pleasure and great success with your PowerBox Royal SRS.
Product description
Here at PowerBox-Systems we have developed a new High-End product designed to provide sup-
reme functionality and security for the demanding pilot.
Present-day requirements obliged us to adopt many new ideas during the development period: the-
se include the triple-axis iGyro as well as our new PowerBUS technology, which is destined to usher
in fundamental changes in the electronic layout of large-scale models as a whole.
In other respects we have retained proven concepts in further developed form. For example, the
new Royal SRS is fully programmable using a menu system, controlled with the SensorSwitch and
a blue backlit LCD screen; as usual, all battery-specific and flight-relevant data can be displayed
on-screen after each flight.
The door sequencer function and the internal iGyro both feature integral set-up assistants which
make it possible to complete the essential set-up procedures in very short order.
Over the last two years developments in serial receiver bus systems have brought them to the fore-
front of modern technology, and the new Royal SRS features these inputs.
The Royal SRS features no fewer than four high-performance voltage regulators, allowing the use
of both HV servos and conventional 6 V types. With dual security in mind, each pair of regulators can
be set to an output voltage of 5.9 V or 7.4 V.
The Servo-Match and Fail-Safe functions have also been expanded: the software now provides
adjustment facilities for all 24 outputs individually, covering servo centre, travels, fail-safe and
hold-mode. Servo reverse is available with a single button-press.
Six different radio control systems - Spektrum, Futaba, Jeti, Multiplex, Hott and JR - can be bound to
the Royal SRS, in most cases also providing telemetry output of the battery-relevant data.

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FEATURES:
Integral iGyro: triple-axis gyro system with heading function and set-up assistant
Six independent gyro outputs for: 2 x ailerons, 2 x elevators, 2 x rudders
GPS-regulated gyro gain
Special regulatory algorithm for fixed-wing model aircraft
Extremely accurate triple-axis MEMS sensor
Integral Delta and V-tail mixer
Door sequencer: six freely programmable outputs with set-up assistant
PowerBUS: 2 outputs, 16 + 2 channels, compatible with other servo bus systems
Servo-Match function: servo centre, end-points and reverse for all 24 servo outputs
SRS: Serial Receiver System provides the facility to use receivers with serial interface: Spekt-
rum DSM2 and DSMX, Multiplex M-Link, Futaba S-Bus, HoTT and Jeti R-SAT2
Unrestricted channel assignment for all 24 PowerBox outputs
Graphic LCD screen with 128 x 64 pixels
Extremely user-friendly menu-based programming using the SensorSwitch
Facility to adjust settings using Bluetooth and Smartphone app
Up to 18 channels - depending on the radio control system in use
Signal amplification and interference suppression for all 24 outputs
Flight recorder, recording of lost frames, fail-safe events and all battery data
Variable frame rate, range 12 ms – 21 ms
Two 16-bit processors for fast, high-resolution signal processing
2 x double-regulated output voltages for receivers and servos
2 regulated voltage ranges with independent selection facility, 5.9 V or 7.4 V
Facility to connect downlink bus systems from Futaba, Jeti, Spektrum, HoTT and Multiplex MSB
Directly transmits battery data, receiver data and GPS data to the transmitter
Separate voltage and capacity display for each battery
Minimum value memory alerts the user to voltage collapses
Large-area heat-sinks for high regulator performance
Regulator monitoring, regulator error indicator
Support for three battery types: LiPo, NiMH / NiCd, LiFePo
Suppression of any servo feedback currents which may occur

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PowerBox-Systems − World Leaders in RC Power Supply Systems
CONTENT
1. LAYOUT, CONNECTIONS....................................................................................................................................5
2. MAIN SCREEN, DATA LOGGER....................................................................................................................5
3. INITIAL STEPS .......................................................................................................................................................... 7
a) Installation notes........................................................................................................................................................ 7
b) Switching the PowerBox on, the menu system............................................................................................. 7
c) Setting the receiving system to be used..........................................................................................................8
d) Setting the battery type ..........................................................................................................................................9
e) Setting the output voltage .....................................................................................................................................9
f) Channel assignment, output side...................................................................................................................... 10
g) Using the iGyro Assistant..................................................................................................................................... 12
h) Using the Door Sequencer Assistant .............................................................................................................20
5. CHANNEL ASSIGNMENT, INPUT SIDE.............................................................................................. 25
6. FAILSAFE AND HOLD FUNCTION.......................................................................................................... 25
7. iGYRO - DETAILED DESCRIPTION.......................................................................................................... 26
a) Special features of the regulatory algorithm .............................................................................................. 26
b) Speed-dependent gain control......................................................................................................................... 27
c) Using the flight modes ......................................................................................................................................... 27
d) Defining the installed orientation of the Royal SRS ................................................................................. 28
e) Defining the wing type..........................................................................................................................................28
f) Defining the individual axes ................................................................................................................................ 28
g) Zero Gyro.................................................................................................................................................................... 33
h) Boost............................................................................................................................................................................34
i) Delta Limiter...............................................................................................................................................................34
j) Gyro Sense x4............................................................................................................................................................ 34
k) Important information on handling the iGyro in day-to-day flying ..................................................... 34
8. MANUAL DOOR SEQUENCER INSTALLATION ............................................................................ 35
9. CHANNEL LOCK WHEN UNDERCARRIAGE IS RETRACTED........................................... 37
10. POWERBUS ............................................................................................................................................................ 37
11. TELEMETRIE...........................................................................................................................................................38
12. RESET, UPDATE, SAVE AND RESTORE...........................................................................................39
13. SPECIFICATION ..................................................................................................................................................40
14. DIMENSIONS ........................................................................................................................................................40
15. SET CONTENTS................................................................................................................................................... 42
16. SERVICE NOTE ....................................................................................................................................................42
17. GUARANTEE CONDITIONS ........................................................................................................................42
18. LIABILITY EXCLUSION .................................................................................................................................43

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1. LAYOUT, CONNECTIONS
PowerBUS outputs
Battery sockets
RX1 and RX2 inputs
for Futaba, HoTT, M-Link, Jeti
Sat1 - Sat4 inputs for
Spektrum satellites
2. MAIN SCREEN, DATA LOGGER
Battery voltage display
GPS status
Gyro sensor status
Receiver status
Battery capacity
Key:
- Battery voltage indicator: Shows the exact battery voltage for both batteries, digitally and as bar
graph
- GPS status: If no GPS is connected here, the screen shows three lines. If switched on with GPS
connected, “SEARCH” is displayed while the system searches for GPS satellites. “OK” must be
displayed here before each flight.
- Gyro sensor status: Information display only. After a “Zero Gyro” the screen should display “IDLE”
at this point; an occasional “ACT” for ‘active’ is normal.
- Receiver status: This item shows which receivers are delivering a signal. Brief flickering of these
points is normal, provided that the receiver “Antenna fades“ counter displays normal values.
servo sockets
Spektrum TM1000
socket
GPS Sensor socket
Telemetry/USB
adapter socket
LCD screen socket
Min. value indicator
Total current output,
digital
Output voltage
Range A and B
Current output, Batt 1
and Batt 2, bar graph

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PowerBox-Systems − World Leaders in RC Power Supply Systems
- Battery capacity: Shows the residual capacity of the batteries in digital and bar graph form.
- Minimum value indicator: The row of white pixels in the bar display represent the lowest voltage
which occurred during the flight. If the minimum value is significantly lower than the actual volta-
ge, this may indicate unsuitable or defective batteries.
- Total current output: Displays your model’s actual current drain.
- Output voltage: Voltage display for both power circuits A and B.
- Current output, Batt. 1 and Batt. 2: Current output of the two batteries in bar graph form.
The RF - Flight Recorder display is accessed by briefly and simultaneously pressing buttons I and
II on the SensorSwitch:
Antenna Fades: - Spektrum, Futaba, M-Link: This item displays the lost data packets for the indivi-
dual receivers.
- HoTT and Jeti: This item displays the number of switching events between the
receivers.
Lost Frames: This value shows how many occasions none of the connected receivers was able
to supply a valid data packet.
Holds: This value is incremented when none of the connected receivers is able to supply
a valid signal for a period longer than 250 ms. When this occurs, the servos move
to the Hold or Fail-Safe positions stored in the backer.
The Power-Flight Recorder display can be accessed by briefly and simultaneously pressing but-
tons I and II on the SensorSwitch a second time:
This Flight Recorder enables you to monitor all data relating to current and batteries.
- Min. Voltage: This is the lowest value to which your battery voltage fell during the flight.
- Max. Current: The highest current which was drawn from each battery during the flight.
- Consumption: This item shows the energy consumed since the system was last switched on. The
value is erased when you switch the system off.
Note: it is extremely rare for the maximum current and / or energy consumption of both batte-
ries to be identical. In fact, the discrepancy is proof that the backer exhibits “genuine redun-
dancy”, i.e. it contains two systems which work entirely independently of each other. Although
we go to great lengths to match the integral regulators accurately to each other, there are al-
ways minor manufacturing tolerances in the components, hence the difference. Only non-re-
dundant systems drain the batteries equally.

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3. INITIAL STEPS
a) Installation notes
The four mounting holes in the base plate of the PowerBox Royal SRS are fitted with rubber grom-
mets as standard. The Royal SRS should be mounted on a surface which is not subject to serious
vibration, using the retaining screws supplied in the set. Although all PowerBox products are de-
signed to be highly resistant to vibration, you should still avoid attaching the backer to thin GRP or
CFRP surfaces. Since the Royal SRS features an integral iGyro, particular care is called for here, i.e.
a rigid mounting surface.
The PowerBox Royal SRS can be installed in any orientation - provided that the case is at right-
angles to the fuselage centreline. In the iGyro menu or in the Basic Setup Assistant all you have
to do is define the unit’s installed orientation by moving the model. There is no need for the pilot to
think about axis designations such as X, Y and Z; instead the familiar terms ‘aileron’, ‘elevator’ and
‘rudder’ can be used. Since the integral iGyro incorporates accelerometers, the Royal SRS does not
need to be positioned at the model’s Centre of Gravity.
The internal card packaging can be used as a template for installing the SensorSwitch. The Sen-
sorSwitch should also be installed at a point where vibration is low. The GRP fuselage sides of a po-
wered model aircraft are not suitable for this, as they suffer from severe vibration. The appropriate
area should be stiffened with a piece of plywood 2 to 3 mm thick; 20 to 40 mm of wood round the
switch is generally sufficient to stiffen the GRP fuselage side. Gluing the plate to the GRP material
helps to absorb the vibration, and also provides plenty of “meat” for the switch retaining screws.
The Info Display should also be installed at a point where vibration is low – and ideally in a position
where it can be seen clearly. The Info Display does not need to be left permanently in the model, as
the Royal SRS also functions without the screen connected. The only point to note is that the Info
Display can only be plugged in gain when the main screen is displayed - not the menu. All you have
to do is ensure that it can be plugged into the main unit when you are using the system.
Connect the SensorSwitch, the Info Display and your batteries to the PowerBox. The Royal SRS
features unrestricted output mapping. This means that you can assign any function to any of the
output. For this reason you should not connect the servos until later – see point 3 d.
b) Switching the PowerBox on, the menu system
The method of switching on and off is very simple, and effectively prevents the system being swit-
ched on or off accidentally. This is the procedure: locate the SET button on the SensorSwitch and
hold it pressed in until the centre LED lights up red. Now press the two buttons I and II in turn: the
backer is now switched on. The procedure for switching off is exactly the same: hold the SET button
pressed in, wait until the centre LED lights up red, then switch off by pressing buttons I and II in turn.
Your PowerBox stores the last switched state. This means that the backer stays off if it is switched
off using the SensorSwitch. Once switched on, the unit can only be switched off again using the
SensorSwitch. Any intermittent contacts or interruptions in the power supply circuit cannot cause
the backer to be switched off.
The menu system for all PowerBox devices is as simple as possible, and generally self-explanatory:
- Hold the SET button pressed in for a few seconds to access the menu system.
- Use the SET button to select the menu point you wish to use.
- Buttons I and II are now used to move the cursor up or down, and to change values once a menu
point has been selected.
- Pressing the SET button again leaves the menu point.

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PowerBox-Systems − World Leaders in RC Power Supply Systems
c) Setting the receiving system to be used
The first requirement is to define the receiving system. If this setting is not selected, the subsequent
functions, settings and assistants only work in a restricted manner.
Switch the PowerBox on as described above. Hold the SET Button pressed in for a few seconds,
and the menu system appears. Select the RX/TX SETTINGS point; the first point in the TX-SYSTEM
menu enables you to select your radio control system:
Spektrum DSM2 and DSMX:
If you select Spektrum DSM2 or DSMX, the additional menu point BIND now appears. Whether you
select the DSM2 or DSMX option depends on your transmitter type - not on the satellites connec-
ted to the system. For example, if your transmitter operates on DSM2, but the satellites are DSMX
types, select DSM2 at this point (for example, this applies to all Spektrum modules fitted to MC-24
transmitters).
Now connect your satellites, and select the BIND menu point; at least three satellites must be
connected. Even if two of three satellites were to fail in flight, SRS technology allows the PowerBox
to continue to function correctly with just a single satellite.
All satellites connected to the system now flash, and can be bound to the transmitter.
The following systems are connected to inputs RX1 and RX2 using the three-core patch-leads sup-
plied in the set:
Futaba S-BUS:
Set the receiver or receivers to “Normal Mode” - not “High-Speed Mode”.
If you are using the R7008SB receiver it is particularly important to set Output 8 to S-Bus, and to
use this output. Do not use the S-Bus2 output! Naturally the receiver’s S-Bus2 socket can be used
for Futaba telemetry accessories.
Multiplex M-Link:
The MPX receiver or receivers must be set to “Digital Output”. This can be selected using the Pro
- Mate device or a USB adapter (Multiplex or PowerBox USB interface) and a PC. The software
required for this is called “Multiplex Launcher”, and is available as a free download from the Mul-
tiplex website. You should also set the fail-safe time to 0s; this is important if you wish to use two
receivers, as it ensures a fast switch-over if signal loss occurs.
SJ HoTT:
If you wish to use a HoTT receiving system, the SUMD signal must be activated at the receiver. Use
the SmartBox or the transmitter’s Telemetry menu to set “CH OUT TYPE: SUMD OF 16”.
“OF” means that the receiver switches the SUMD signal off if signal loss occurs. The SRS system
detects this within a few milliseconds, and switches over to the second receiver. If you intend to use
only one receiver, you can also set FS or HD.

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Jeti Duplex:
Connect two R-Sat2 satellites or REX receivers directly to RX1 and RX2. The receivers are bound in
two-way mode. The following settings must be carried out:
- Serial output: UDI
Primary settings:
- Signal speed: 10 ms
- PPM settings: Direct
- Failsafe: Inactive (if two receivers are in use; otherwise any setting)
Visit us in our support forum for more and more detailed information how to connect receivers.
d) Setting the battery type
It is essential to set both the battery type and the capacity of the batteries you intend to use, other-
wise accurate battery monitoring will not be possible. You will find this set-up point in the POWER/
TELEMETRY menu:
- CHEMISTRY: Select one of the three battery types: LiPo, NiMH or LiFePo
- CAPACITY: Select the capacity of your batteries at this point. Since V12 the PowerBox detects that
a charge process is under way, and automatically resets the residual capacity display. However,
it is also possible to reset the capacity manually by holding buttons I and II pressed in simulta-
neously.
e) Setting the output voltage
The Royal SRS is fitted with a total of four independent high-performance voltage regulators. In
order to guarantee 100% redundancy, these are linked together in pairs. You can select the output
voltage of each of these regulator pairs A and B. For example, it is possible to set an output voltage
of 7.4 V for regulator pair A, and 5.9 V for regulator pair B. This feature makes it possible to connect
a mixture of HV servos and normal servos to the PowerBox Royal SRS. The markings A(red) and B
(black) on the case cover indicate which outputs are assigned to range A, and which to range B. The
Output Mapping function provides a comprehensive means of assigning the appropriate output
voltage to particular functions.
Note: the PowerBUS outputs are also assigned to voltage range Aand voltage range B.

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PowerBox-Systems − World Leaders in RC Power Supply Systems
f) Channel assignment, output side
As already mentioned, the outputs of the PowerBox Royal SRS can be assigned in any way, without
restriction. This means that particular functions or channels can be assigned to any of the 24 out-
puts. The menu point where this is carried out is entitled OUTPUT MAPPING:
This menu displays a graphic image of the outputs. You can use the cursor to move through the
outputs in order to select the one you wish to assign. Pressing the SET button at a selected output
highlights the FUNCTION field, where you can select the signal to be assigned to this output. Pres-
sing the SET button again highlights the FAIL field, and pressing the SET button a third time causes
the cursor to move back to the Outputs field.
Key to the different displays for the outputs:
Cursor, or selected output
Free output, not yet assigned
Assigned channel, output switches to Hold when fail-safe is triggered
Assigned channel, output switches to saved fail-safe position when fail-safe is triggered
Note: Output Mapping provides enormous scope for individual arrangements. By default most
of the outputs are pre-defined, as this minimises the amount of set-up work that has to be
carried out. You will find a list of pre-defined outputs on the next page.

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The following set-up facilities are provided:
- FUNCTION:
» DIRECT 1…18:
Depending on your radio control system, you can output channels 1 – 18 (Futaba) directly, i.e. as they
arrive from the transmitter.
Example: the right-hand landing flap is programmed to channel 9 at your transmitter, and you want
to connect the landing flap servo to output D. Move the cursor to the OUTPUT D field, and confirm
your choice with the SET button. Set DIRECT 9 under FUNCTION. The servo connected to output D
now outputs channel 9 from your transmitter 1 : 1 - unless Servo Matching has been carried out on
this channel.
» GY AILERON A and B:
If you select one of these functions, this output is linked to the iGyro output Aileron A or B.
Example: the left aileron is connected to GY AILERON B, the right aileron to GY AILERON A.
» GY ELEVATOR A and B:
If you select one of these functions, this output is linked to the iGyro output Elevator A or B.
Example: the left elevator is connected to GY ELEVATOR B, the right elevator to GY ELEVATOR A.
» GY RUDDER A and B:
If you select one of these functions, this output is linked to the iGyro output Rudder A or B.
Example: the rudder is connected to GY RUDDER A, the steerable nosewheel to GY RUDDER B.
» DS-OUT 1…6:
If you select one of these functions, the output is linked to the door sequencer. You can select which
wheel door or which valve is controlled by which door sequencer output without any restriction, but
we always recommend that you make use of the Door Sequencer Assistant, which determines the
output assignment as shown below.
- FAIL:
» FS:
If there is a complete loss of signal at all receivers connected to the system, this output runs to a
previously determined position. See Point 6 for information on defining this position.
» HOLD:
If there is a complete loss of signal at all receivers connected to the system, this output remains in
the last known valid position.
By default, or after you have RESET the OUTPUT MAPPING, certain outputs are pre-defined in order
to reduce the amount of set-up work the user is required to carry out. The iGyro outputs are pre-de-
fined in any case. The door sequencer functions are assigned to the outputs listed below, but only if
the door sequencer Assistant has been invoked.
If you wish to re-assign an output after setting up the gyro or the door sequencer, this generally
presents no problems, as the changes do not affect the gyro or door sequencer settings.

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Default output assignments:
Note:
- After a Reset the fields outlined in green are assigned as shown below:
- Fields outlined in red are assigned as shown below, but only if the Sequencer Assistant has
been used:
g) Using the iGyro Assistant
With the help of the Setup Assistant you should be able to set up the integral iGyro in no more than
ten minutes. Once you have completed the basic settings, only a single flight is required in order to
carry out the fine-tuning.
Although the Assistant guides you through the procedure via the LCD screen, please take the time
to read right through these instructions, as they contain supplementary information which is im-
portant during the set-up procedure.
You will find a detailed description of the iGyro under Point 7.
The Assistant covers 99% of all model types, but its suitability for the following types is limited:
- Models with canard surfaces
- Models with thrust vectoring
The Assistant can be used to set up the primary functions for these types of model, i.e. aileron,
elevator and rudder, but the non-standard functions mentioned above have to be set up manually.
ADirect 5 / VALVE sequencer Mfree
BR.H. wheel door NDirect 10
CL.H. wheel door OGyro, rudder (A)
DDirect 8 PGyro, rudder (A)
EDirect 8 QGyro, rudder (A)
FNosewheel door RDirect 11
GGyro, right aileron (A) SGyro, left elevator (B)
HGyro, right aileron (A) TGyro, left elevator (B)
Ifree UDirect 3
JDirect 9 VGyro, right aileron (B)
KGyro, right elevator (A) WGyro, right aileron (B)
LGyro, right elevator (A) XDirect 1

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Before you carry out the fine-tuning flight we strongly recommend that you run through the TEST-
FLY ASSISTANT on the ground several times, to familiarise yourself with the sequence of operations
and the way it works. It is also extremely helpful to have a fellow-modeller by your side during the
set-up flight, as he will be able to follow the flow-chart, and keep track of the adjustment sequence.
The system also incorporates a safety function, should anything unforeseen occur:
Moving the flight mode switch to the FM1 position always disables all the gyro functions!
The set-up procedure is divided into two sections:
- BASICS SETUP ASSISTANT
In this section you select all the model-specific settings, e.g. the gyro’s installed orientation in the
model, channel assignment, direction of gyro effect.
- TESTFLY ASSISTANT
In this section you adjust the gyro’s gain (sensitivity) while the model is flying. It is advisable to
run through this section of the Assistant several times before flying the model, to ensure that you
are familiar and confident with the set-up procedure. Carrying out a ‘dry run’ in this way does not
affect the settings you selected in the BASICS SETUP ASSISTANT. If you still find yourself feeling
uncertain whilst flying, it is also possible to land after each setting, and check the current state of
the procedure on the screen.
The only preparations you have to make are these:
- Enter the radio control system you wish to use under Point 3c)
- Assign a three-position switch and a rotary knob or slider at the transmitter
Select the BASICS SETUP ASSISTANT menu from the iGyro menu:
Now follow the instructions on the screen:
At this point you need to define your model’s wing
or tail type. If your model is a delta or V-tail type, do
not set up a delta or V-tail mixer at the transmitter;
the mixing is carried out by the iGyro itself. Confirm
your choice by pressing the SET button twice.

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The next step is to define the input chan-
nels: the Assistant automatically detects
the channels when you operate them at
the transmitter. Move the three-position
switch on your transmitter. The Assistant
does not accept your chosen switch until
you have selected all three flight modes.
Press the SET button when you have made
your choice.
Now move your aileron stick: the Assistant
automatically detects whether you are
using one or two channels to control the ai-
lerons. If you accidentally touch a different
function at the transmitter, simply move
the correct one subsequently.
Move to your transmitter’s Servo Monitor
to check the setting. Press the SET button
when you have made your choice.
Here again all you have to do is move the
slider or rotary knob in order to inform the
iGyro of the gain channel. The Assistant
does not accept your choice unless it de-
tects 0% to 100%. Press the SET button
when you have made your choice.
Now move the elevator stick. The Assistant
automatically detects whether you are
using one or two channels to control the
elevators.
Move to your transmitter’s Servo Monitor
to check the setting. Press the SET button
when you have made your choice.
Note: if the Assistant succeeds in detecting the channel, but fails to accept the setting, increa-
se servo travel at the transmitter to -105% to +105% for that channel. If this also fails to cure
the problem, select your transmitter’s Servo Monitor, and check that you are only controlling
one channel. It is easy to overlook the fact that the switched channels (DG1 or DG2) also move
- especially if you are using a Futaba system.
Note: many model jets and warbirds utilise a large number of functions, and you can quite ea-
sily “run out of channels”. However, the Royal SRS provides the complete remedy: use just one
channel at the transmitter for each of the functions ailerons, elevator and rudder / nosewheel
steering, then use the Servo Match function to set up the second control surface, and adjust
the direction and end-points accurately.

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Now move the rudder stick. In this case the
Assistant should only detect two channels
if two gyro channels are used to control
two separate rudders. Select your trans-
mitter’s Servo Monitor to check the setting.
Press the SET button when you have made
your choice.
If you have not yet entered any settings at
Output Mapping, you will see this default
display. The output assignment is set as
described under 3f). You now have the op-
portunity to adjust the outputs to suit your
model, after which you should confirm your
settings with OK.
This message instructs you to move to the
next screen display and assign the outputs.
Press the SET button twice when you have
made your choice.
At the first screen you are requested to rai-
se or lower the model’s tail. You can imme-
diately determine whether the correct axis
is selected by observing the elevator’s res-
ponse. If the elevator does not deflect, brie-
fly jerk the model’s tail up or down once.
The PowerBox detects this movement,
causing the sensor to switch to the correct
axis. Hold the model’s tail at a slight angle,
so that the bar deflects fully to the right,
and wait until the elevator jumps back to
the neutral position. The screen now swit-
ches automatically to the next display.
Note: if your model features a thrust vector control system or canard surfaces, the vector /
canard channel must be set up manually. The channels for vector control or canard control
must be switched off at the transmitter while you are using the Assistant. Please ensure that
they are not detected for ELEVATOR and RUDDER.

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At this point you are requested to swing
the model’s tail to left or right: the rudder
should immediately deflect in response to
this movement. Here again: if the rudder
does not respond, briefly jerk the model’s
tail once to left or right, so that the sensor
switches to the correct axis.
Now hold the model’s tail far enough to
left or right to cause the bar to move to full
deflection, and wait until the rudder jumps
back to the neutral position. This concludes
the procedure.
The iGyro now automatically activates
Heading mode, as this displays the gyro’s
effect in the clearest fashion. At this point
it is essential to check the direction of ef-
fect of the control surfaces: if the directi-
on of effect is incorrect, move the cursor
to the appropriate channel and press the
SET button to reverse the direction. Please
take particular care, and work conscien-
tiously here - don’t rush it!
Once all the control surfaces are set up
correctly, select OK: the iGyro is now disa-
bled again.
The basic settings are now complete, and you can
fly the model using the TESTFLY ASSISTANT.

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Testfly Assistant
Another reminder at this point: please run through this Assistant several times on the ground to
ensure that you are familiar with the sequence of operations. We have included small tick-boxes
next to each individual step. If you have a friend to help you during the flying stage, he can tick the
corresponding box when each stage is completed. If you are not absolutely sure of the status of the
Assistant, there is no reason why you should not land the model, check, then fly again.
In the Main menu select the TESTFLY AS-
SISTANT.
The iGyro initially carries out a zero calibra-
tion process. During this period you must
keep the model motionless. However, it
does not need to stand exactly level!
Now move all the transmitter sticks to their
end-points in order to teach the iGyro the
maximum travels. If you have set up a “Dual
Rate” switch at your transmitter, ensure
that it is set to maximum travels.
Select OK when you are finished.
The iGyro now waits until the flight mode
switch is moved to FM2 or FM3, and the
gain control is set to 0%, before it proceeds.
Now we can go flying!
The gyro is active, the gain adjuster is
set to 0%. Fly the model “straight and level”,
carry out a slow pass, and turn up the gain
adjuster until the model just starts to oscil-
late around the aileron (roll) axis. Back off
(reduce) the gain adjuster slightly. If you
wish, you can fly several circuits to ensu-
re that the setting is right. When you are
confident that it is correct, move the flight
mode switch to FM1. This disables the gyro
again, and saves the settings.

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PowerBox-Systems − World Leaders in RC Power Supply Systems
The iGyro now waits again until you
switch back to FM2 or FM3, and the gain
adjuster is returned to 0%. The next step -
rudder gain in Normal mode - can be ad-
justed once those requirements are met.
The rudder is a special case. The Hea-
ding value for rudder has an adverse effect
when the model is turning normally, becau-
se the gyro tries to maintain the former di-
rection of flight. For this reason the Normal
and Heading values for rudder gain are set
up separately. Use the gain adjuster to set
the gyro effect for the rudder, then move
the flight mode switch to FM1 before con-
tinuing.
The iGyro now again waits until you
switch back to FM2 or FM3, and the gain
adjuster is returned to 0%. once those re-
quirements are met, gyro gain for elevator
can be adjusted in flight.
Again fly the model straight and level,
and carry out a slow pass. Advance the
gain adjuster until the model just starts to
oscillate around the elevator (pitch) axis,
then reduce the gain setting slightly. If you
wish, you can fly several circuits to check
that the setting is correct. When you are
confident that it is correct, move the flight
mode switch to FM1. This action disables
the gyro again, and the settings are saved.

www.powerbox-systems.com
19
The iGyro now waits again until you
switch back to FM2 or FM3, and the gain
adjuster is returned to 0%. The next step -
rudder gain in Heading mode can be ad-
justed once those requirements are met.
The procedure for setting rudder gain
in Heading mode is identical to the prece-
ding method. However, if you are not sa-
tisfied with the setting after the first pass,
initiate a turn using very gentle rudder in
addition to aileron, as this suppresses Hea-
ding mode for rudder. The set-up procedu-
re can then be continued. Switch to FM1
when you are satisfied with the setting.
The set-up procedure for the iGyro is now com-
plete: the Assistant has set up flight modes FM2
and FM3, and FM2 is set as the standard flight
phase. Heading mode for the rudder is disabled.
Flight mode FM3 can be switched on for specific
aerobatic manoeuvres such as knife-edge flying
and slow rolls.
The iGyro Testfly Assistant adopts the same gain values for Normal and Heading mode for aileron
and elevator. Of course, it is still possible to alter any or all of the settings subsequently in order to
fine-tune the gyro’s effect. For example, you might wish to enter different settings for Normal or
Heading modes, or activate the Booster for particular axes. You will find a detailed description of
these facilities under Point 7.
Note: we recommend that 3D pilots should program at least one flight mode without Heading
values: when a model is flying a 3D manoeuvre, its lack of airspeed makes it incapable of mo-
ving in all directions, and the gyro’s attempts to maintain position may cause control surfaces
to move to their end-points. If the model then picks up speed again, the deflections could
cause the model to carry out unexpected movements.

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PowerBox-Systems − World Leaders in RC Power Supply Systems
h) Using the Door Sequencer Assistant
The Setup Assistant significantly simplifies the set-up procedure for the door sequencer function.
The Setup Assistant is not a second door sequencer; instead its purpose is to define the Tasks in
the door sequencer to match your requirements, i.e. the information you enter. Because of this it
is also possible at any time to expand or alter the retract or wheel door functions after you have
completed the Setup Assistant procedure.
The Setup Assistant guides you through the settings: on-screen instructions describe everything
that you have to do. These instructions simply provide supplementary information which cannot be
supplied by the PowerBox itself simply due to the size of the screen.
Preparation:
- The radio control system is set up correctly, and all the other control surfaces move properly.
- Do not connect any servos or valves to the door sequencer at this point.
- Assign a transmitter switch to a vacant channel, and set up servo travel for that channel to the
standard range of -100% to +100%. If you are using a Futaba system, it is also possible to use DG1
or DG2.
- If you intend to use pneumatic valves, please ensure that there is adequate pressure in the system
throughout the programming procedure to avoid interruptions and other problems.
Access the PowerBox’s Door Sequencer menu, and select the SETUP ASSISTANT point. You will
now see the following screen display:
At this point the Royal SRS learns which switch is to be used: the unit automatically detects the
appropriate channel when you operate the transmitter switch you have assigned for the retractable
undercarriage. The double arrow on the screen should move from the UP line to the DOWN line. If
your retract switch operates in the wrong “sense”, change it by reversing that output at the trans-
mitter.
Press the SET button in order to continue with the Assistant; the next screen display now appears: