Flex innovations Pirana User manual

www.f lexinnovations.co m
DESIGNED BY:

1
STOP
BEFORE CONTINUING WITH THIS INSTRUCTION MANUAL OR ASSEMBLY
OF YOUR AIRCRAFT, PLEASE VISIT OUR WIKI PAGE SUPPORT SITE FOR THE
LASTEST PRODUCT UPDATES, FEATURE CHANGES, MANUAL ADDENDUMS,
AND FIRMWARE CHANGES FOR BOTH YOUR AIRCRAFT AND THE INSTALLED
FT AURA 5 LITE ADVANCED FLIGHT CONTROL SYSTEM.
wiki.flexinnovations.com/wiki/Pirana
wiki.flexinnovations.com/wiki/Aura

Specications....................................................................................3
TABLE OF CONTENTS
Replacement Parts Listing............................................................3
Optional Completion Items......................................................... 3
Completion Items ..........................................................................3
Battery Charging Guidelines....................................................... 3
Important Information Regarding Warranty.........................4
Safety Warnings and Precautions..............................................4
Low Voltage Cuto........................................................................4
FT Aura 5 Lite ............................................5
Transmitter Setup............................................................................6
Receiver Installation/Servo Connections................................7
Wing Installation............................................................................11
Vertical Fin Installation.........................................................12, 13
FPV Video Gear Installation (Optional)......................... 14, 15
Center of Gravity Verication .....................................................18
Control Direction Test......................................................................19
Flight Control Sensing Direction Test.......................................20
Pre-ight Checklist...........................................................................21
Launch Assist................................................................................... 21
Flying Your Piraña..........................................................................24
Aircraft Troubleshooting Guide...............................................25
Airframe Repairs............................................................................26
Replacing Servos............................................................................26
2
INCLUDES
Piraña assembled and painted airframe with decals applied
FT Aura 5 Lite Advanced Flight Control System (programmed and ready to use)
Potenza 20L 1200Kv Motor
ZTW 50A ESC
(2) Potenza DS17 Digital Servos
(2) Potenza DS12 Digital Servos
REQUIRES
............................................
Connecting/Binding your Receiver to Aura..........................8
Connecting your Receiver to Aura...........................................9
Receiver Installation (Mounting Locations) .......................10
Connecting a Battery to the LED Controller......................17
Propeller Installation..................................................................18
Serial-Capable Receiver
5+ Channel Computer Transmitter
6S 1300-1800 45C+ Li-Po Battery
Special Language Denitions......................................................4
Battery Installation.....................................................................16
Connecting Battery/Arming ESC...............................................7
Servicing the Power System.......................................................27
AMA Safety Code..........................................................................28
Limited Warranty..........................................................................29
Aura Quick Change Mode...........................................................23
Aura Auto-Detect...........................................................................9
APC 6.5 x 6.5 Propeller
(1) FPV Nose
Trimming...........................................................................................22
ESC Throttle Calibration...............................................................9

3
The assembly of the Piraña can be accomplished in less than
one hour. Prior to assembling the airplane, it is advisable to charge your
battery so that you are ready to begin setup upon completion of the
assembly of your model.
We recommend the use of an advanced Li-Po balancing charger for your
batteries to get the maximum performance and lifespan from them.
Our airplanes are designed around our Potenza Li-Po batteries and we
recommend the Potenza 6S 1500 Li-Po (FPZB15006S45) in the
Piraña based on our extensive testing and development.
This battery features an EC3 connector, no soldering is required for use
in your Piraña.
Innovations retailer.
WARNING
FOLLOW ALL INSTRUCTIONS PROVIDED BY YOUR
BATTERY AND CHARGER MANUFACTURER. FAILURE TO
COMPLY CAN RESULT IN FIRE.
BATTERY CHARGING GUIDELINES
INSTALLED!
INSTALLED!
INSTALLED!
NEEDED TO
COMPLETE
NEEDED TO
COMPLETE
1500mAh 6S 22.2v 45C or higher
Li-Po Battery (FPZB15006S45 )
5+ Channel Computer Transmitter
Potenza 20L 1200Kv Brushless
Outrunner Motor (FPZM1020LA)
(ZTW50APirana)
INSTALLED!
FT Aura 5 Lite Advanced Flight Control
System (FLT8050)
Potenza DS12 Sub-Micro (2) and
DS17 Sub-Micro (2) Digital Servos
(FPZDS17)
NEEDED TO
COMPLETE
COMPLETION ITEMS
RECEIVER
SPECIFICATIONS
35.7 in. (910mm)
2lb 4oz (1020g)
RTF with 6S 1500mAh 45C
battery installed ZTW 50A ESC with 5.5V SBEC
REPLACEMENT PARTS
FPZA1010
FPZB15006S45
OPTIONAL ACCESSORIES
FPZB15006S100
FPZB18006S45
SPM4651T
FUTR6202SBW
FUTR2001SB
FUTT6K
IDSTD2
FPZA1027
FPM4170A
FPM4170B
FPM417001A
FPM417001B
FPM417002A
FPM417002B
FPM417004A
FPM417004B
FPM417003A
FPM417003B
FPM417005A
FPM417005B
FPM417006A
FPM417006B
FPM417007A
FPM417007B
FPM417009
FPM417010
FPM417011
FPM417011A
FPM417011B
FPM417012A
FPM417012B
FPZDS12P
FPZDS17
FPZM1020LA
FPZM1020L1
FPMZ1020L2
ZTW50A Pirana
LPO6565
Piraña Super PNP (Orange)
Piraña Super PNP (Yellow)
Piraña Fuselage (Orange)
Piraña Fuselage (Yellow)
Piraña Wing Set (Orange)
Piraña Wing Set (Yellow)
Piraña Vertical Fin with Rudders (Orange)
Piraña Vertical Fin with Rudders (Yellow)
Piraña Vertical Fin (NO Rudders) (Orange)
Piraña Vertical Fin (NO Rudders) (Yellow)
Piraña Speed Nose (Orange)
Piraña Speed Nose (Yellow)
Piraña FPV Nose (Orange)
Piraña FPV Nose (Yellow)
Piraña Decal Set (Orange)
Piraña Decal Set (Yellow)
Piraña Plywood Floor w/screw
Piraña Video TX Mount
Piraña Hardware Set
Piraña Rear Hatch (Orange)
Piraña Front Hatch (Yellow)
Piraña Front Hatch (Orange)
Piraña Rear Hatch (Yellow)
Potenza DS12 Sub-Micro Servo for Piraña
Potenza DS17 Sub-Micro Servo
Potenza 20L Brushless Outrunner 1200KV Motor (6s)
Potenza 1020L Prop Nut and Washer
Potenza 1020L Aluminum Motor Mount
ZTW 50A Piraña
APC 6.5x6.5 Prop
(FPZDS12)
APC 6.5x6.5 Propeller
(LPO6565)
Potenza Digital Battery Analyzer
Potenza 6S 1500mAh 45C Li-Po Battery
Potenza 6S 1500mAh 100C Li-Po Battery
Potenza 6S 1800mAh 45C Li-Po Battery
Spektrum DSMX SRXL 2 Receiver with Telemetry
Futaba R6202SBW S.BUS FASST Receiver
Futaba R2001SB S.BUS S-FHSS Receiver
Futaba T6K Transmitter and Receiver
iSDT D2 Smart AC Dual Battery Charger 100W x 2
iSDT Charge Lead Adapter
INCLUDED!
29.5 in. (750mm)
5+ Channel Serial Receiver
SPM9745 Spektrum DSMX Remote Receiver
FPZA1016 Potenza Advanced R/C LED Controller (6s)

4
NOTICE: Procedures, which if not properly followed, create a possibility of physical property
damage AND a little or no possibility of injury.
CAUTION: Procedures, which if not properly followed, create the probability of physical
property damage AND a possibility of serious injury.
WARNING: Procedures, which if not properly followed, create the probability of property damage,
collateral damage, and serious injury OR create a high probability of serious injury.
ATTENTION
Read the ENTIRE instruction manual to become familiar with the features of the product before
operating. Failure to assemble or operate the product correctly can result in damage to the
product, personal property, and cause serious or fatal injury.
All instructions, warranties and other collateral documents are subject to change at the sole
discretion of Flex Innovations LLC, Inc. For up-to-date product literature, please visit our website
SPECIAL LANGUAGE DEFINITIONS
The following terms are used throughout the product literature to indicate various levels of potential harm when operating this product:
WARNING
This product is not intended for use by
children under 14 years without direct
adult supervision.
AGES 14+
IMPORTANT INFORMATION REGARDING WARRANTY
Please read our Warranty and Liability Limitations section before building this product. If you as the Purchaser or user are not prepared to
accept the liability associated with the use of this Product, you are advised to return this Product immediately in new and unused condition
to the place of purchase.
SAFETY WARNINGS AND PRECAUTIONS
Protect yourself and others by following these basic safety guidelines.
1. This manual contains instructions for safety, operation and maintenance. It is essential to read and follow all the instructions and warnings
in the manual, prior to assembly, setup or use, in order to operate correctly and avoid damage or serious injury.
2. This model is not a toy, rather it is a sophisticated hobby product and must be operated with caution and common sense. This product
requires some basic mechanical ability. Failure to operate this product in a safe and responsible manner could result in injury or damage
to the product or other property.
3. This model must be assembled according to these instructions. Do not alter or modify the model outside of these instructions provided by
information about clubs in your area whose membership includes experienced pilots.
components may occur, or corrosion of components may lead to intermittent failures.
LOW VOLTAGE CUTOFF
Li-Po batteries have a nominal (rated) voltage of 3.7v per cell, and fully charged, reach 4.2v per cell. Batteries are designed to be discharged
below the nominal voltage. However, if they are discharged below 3.0v per cell, damage will occur and the pack will lose capacity. For best
long term battery life, set a timer and land after a time that leaves approximately 15% of the battery’s capacity remaining.
Piraña and LT Aura 5 Lite product pages.
LLC
6
Low voltage cuto is a feature that is built into the ZTW 50A ESC that is designed to protect the connected battery from being discharged too far
and causing permanent damage to the cells. Circuitry within the ESC will automatically detect when the input voltage from the battery pack
reaches below 3.0V per cell (average) and will remove power to the motor, but still deliver power to the servos so that a safe landing can be made.
If the motor begins to lose power rapidly during ight, the LVC has sensed that the total voltage of the pack has dropped below 3.0V per cell
average and the airplane should be landed immediatey.

FT AURA 5 LITE AFCS
5
https://www.flexinnovations.com/aura-config-tool-install/
Mode 1 (Sport, Gyro O) - Gyro gain is set to o.
All rates are set to low, and exponential is tuned
for comfortable ight.
Mode 2 (Sport, Gyro On) - Gyro gain is set to low.
All rates are set to low and exponential is tuned
for comfortable ight.
Mode 3 (Advanced, Gyro On) - Gyro gain is
moderate. All rates are set to high and
exponential is tuned for comfortable ight.
Each of the modes are tuned by the Flex Team
to oer a solid starting point. Individual
preferences can vary, so sometimes changes in
rates and expo are required to better suit
individual preferences. Adjustments should be
made in the FT Aura 5 Lite via the Aura Cong
Tool, NOT in the transmitter. Changes in gain
value can only be made through the Aura.
Description of Pre-Loaded Aura Light Modes
The FT Aura 5 Lite AFCS (Advanced Flight Control System)
comes programmed and installed in your Piraña, making
setup a breeze. This highly-refined 3-axis gyro makes the
aircraft fly like it is a larger aircraft and in less wind. Thanks
to the Aura’s advanced implementation, it not only enhances
the flying experience, but it never interferes with the Pilot’s
control.
The FT Aura 5 Lite comes configured with Flight Modes
(dual rates, expos and gyro settings) set by the Flex
Innovations team, and offers a great starting point for most
pilots. Since these are already configured for you in the Aura,
there is no need to set up dual rates or expos in your
transmitter. Simply follow the Transmitter Configuration Guide
in this manual for complete details on the transmitter
programming required for the Piraña and FT Aura 5 Lite.
Visit wiki.flexinnovations.com/wiki/Aura for the latest
Aura-related product information and updates.

6
TRANSMITTER SETUP
125%
Sub Trim
Trim Levers
imerT 3
Wing/Tail Type 1 Aileron, 1 Elevator, 1 Rudder
FOR CUSTOMERS USING TRANSMITTERS OTHER THAN WHAT IS LISTED IN THE CHART ABOVE, PLEASE VISIT
OUR WIKI PAGE FOR INSTRUCTIONS SPECIFIC TO YOUR TRANSMITTER AND RECEIVER BRAND
HITEC wiki.flexinnovations.com/wiki/Aura/HitecSbusUse
CH5 (Gear)
TRANSMITTER CONFIGURATION GUIDE
End Points
(Travel, EPA, or ATV)
Reversing
When programming your transmitter, start with a freshly reset, new model memory in your transmitter. Make
ONLY the changes shown in the Transmitter Configuration Guide.
1. JR XBUS, Mode A is shown in the chart above, and is the preferred method to connect to Aura.
Ail/Ele/Rud
Spektrum, Futaba, JR & Graupner FrSky
1 Aileron, 1 Elevator, 1 Rudder
Ail/Ele/Rud 100%
Verify at zero, NOT ALLOWED
Verify at zero
Assign to a 3-position switch
Jeti (Ex-Bus) 
Not Allowed
100%
1 Aileron, 1 Elevator, 1 Rudder
Ail/Ele/Rud
Set to 4:00 for initial flights
The included FT Aura 5 Lite is designed to work seamlessly with all popular transmitter and receiver brands, however,
transmitter setup is significantly different than when setting up a model without Aura.
WARNING
DO NOT ATTEMPT RADIO SETUP WITH PROPELLER INSTALLED. INAVERTENT POWER UP
COULD CAUSE DEATH OR SERIOUS INJURY
2. If you are using a Futaba transmitter, please note that some Futaba transmitters have the throttle set to reversed by
default. We recommend that you leave the reversing set to the defaults and reverse it if needed after testing.
3. This aircraft can typically fly anywhere between 4 and 7 minutes (w/6S 1500mAh Li-Po), depending on flying style.
2
1
100%
Thro/CH5/CH6 Thro/Ch5/Ch6 80%
84% Thro/CH5/CH6

7
CONNECTING A BATTERY/ARMING THE ESC
1.
2.
3.
4.
CAUTION
RECEIVER INSTALLATION/SERVO CONNECTIONS
Supported Serial Receivers
Ensure the propeller is removed unless this sequence is
followed to power up before flight.
Turn on the transmitter, lower the throttle stick AND throttle
trim to their lowest settings. Be sure to wait for your
transmitter to indicate the radio signal is being broadcast
before proceeding.
If a battery is connected to the ESC with throttle fully open
on the transmitter, the ESC will enter programming mode. If
this occurs, simply disconnect the battery, lower the throttle
and reconnect the battery.
Ensure the aileron, elevator,and rudder gimbals are
centered.
5. With the airplane on a solid surface, connect the battery to
the ESC and wait. The ESC will make the motor emit a
series of audible tones during its initialization process.
6. The ESC will make the motor emit a short, final tone
sequence indicating that the ESC is now armed and the
motor will spin in response to throttle stick movement.
Observe the following procedures to safely power up your model
after it has been bound.
ONLY CONNECT THE BATTERY WHEN THE THROTTLE
STICK AND THROTTLE TRIM IS IN THE IDLE (CUT-OFF)
POSITION.
Choosing a Receiver
Aura will auto-detect modern serial receiver connections. For
use in the Piraña, only a serial receiver connection or a Spektrum
Remote Receiver can be used.
Spektrum Remote Receiver - SPM9645, SPM9745
Spektrum SRXL - SPMAR8010T, SPMAR9030T
Spektrum SRXL2 - SPM4651T, SPM4650
Futaba S.BUS - Futaba R2001SB, R6202SBW, R7008SB
Hitec S.BUS - Optima SL, Maxima SL
FrSky S.BUS - RX4R, RX6R
Graupner HOTT (Sum D of 8) GR12L, GR16L
JR XBus (Mode A & Mode B) - RG012BX, RG613BX, RG821BX
Jeti EX-Bus - REX10, R9 EX, REX6
DEFAULT AURA CONNECTIONS
S1...................
S2...................
S3...................
S4...................
S5...................
Throttle
Left Elevon
Right Elevon
Left Rudder
Right Rudder
Port B.............
Mini Port B....
Serial Receiver Input
Spektrum Remote
Receiver Input
Mini Port B
Port B
Below are a few examples of
receivers that can be used with the FT Aura 5 Lite. This is not a
complete list of compatible receivers, rather a short list to assist
you in your receiver selection.

8
CONNECTING YOUR RECEIVER TO AURA
Note: The Spektrum 4651T
receiver requires the use of a
different cable to connect to
Aura. The cable is included with
the receiver when it is purchased
directly from Flex Innovations.
You can also purchase the cable
itself at flexinnovations.com
(FPZA1039)
1.
2.
3.
4.
If using a standard serial receiver, connect the provided male
to male cable to your receiver’s serial port. Connect the other
end of the cable to Aura Port B noting proper polarity.
Bind your receiver to your transmitter per your receiver and
transmitter manufacturer’s instructions.
If using a Spektrum Remote Receiver, connect it to
Aura Mini Port B using the cable provided with your
receiver.
Binding Your Receiver
Serial ReceiversSpektrum Remote Receivers
Note: If you are using
Futaba S.Bus, be sure to
use the proper S.BUS port
in your receiver. DO NOT
use the S.BUS2 port, as it
is not supported with the
FT Aura 5 Lite. Refer to
your manufacturer’s
instructions for proper
S.Bus use.
Note: When using Spektrum SRXL to connect to the Aura, always
connect the remote receivers to the Spektrum receiver, NOT the
Aura
With your transmitter and receiver powered OFF,
press and hold the bind button on the FT Aura 5
Lite.
Power on the FT Aura 5 Lite and your aircraft by
connecting the flight battery to the ESC.
Release the bind button on the FT Aura 5 Lite,
and confirm that the remote receiver is rapidly
flashing orange.
Follow your transmitter manual for binding. This
is typically done by holding the bind button on
your transmitter while simultaneously powering
it on.
Binding Your Receiver
Note: If your serial receiver has a working throttle port while
it sends serial data, USE IT. Plug the ESC lead into the throttle
port of your receiver.

Once your receiver is bound, powered, and connected to the Aura, the Aura will begin the Auto-Detect process to learn
what type of receiver you are using and set itself up for that specific system.
Auto-Detect is indicated by a series of sweeping LEDs of various colors on the FT Aura 5 Lite. After Auto-Detect is
completed, verify that Aura is on and receiving data from your receiver by looking at the LEDs on the Aura.
Ready-To-Fly:
Solid Orange LED (Aura On and Calibrated)
Solid Green LED (Aura Receiving Valid receiver data)
CONNECTING YOUR RECEIVER TO AURA (Auto-Detect)
FT Aura 5 Lite Auto-Detect
Possible Errors:
Flashing Orange LED (Aura Moved During Power Up)
No Green LED (Aura NOT Receiving Receiver Data)
ESC THROTTLE CALIBRATION
In order to map the full range of the ESC output to your throttle stick motion you will have to perform an ESC throttle
calibration.
NOTE: Execute ESC throttle calibration with the propeller removed.
1. Power ON your transmitter, DISABLE any throttle hold or throttle kill switches, completely lower the throttle trim
and set the stick to full throttle.
2. Connect the flight pack to your Piraña.
3. Listen for tones coming from the ESC through the motor. After about two seconds, you should hear two tones.
4. Pull the throttle stick back to idle.
5. Listen for the ESC to confirm with two tones from the motor, followed by the arming tones.
The ESC throttle range has now been properly calibrated, and is stored in the ESC’s memory until it is calibrated
again. You can repeat this process as many times as necessary.

10
RECEIVER INSTALLATION (MOUNTING LOCATIONS)
1.
2. Both forward and rear plywood trays can be removed with a #1 Phillips screwdriver, offering plenty of space for
mounting your receiver. If using a Spektrum Remote Receiver, there is additional mounting locations in the vertical
fins. Follow your receiver manufacturer's instructions for details on how to mount your receiver(s).
Lift the forward hatch off of the fuselage by lifting at the front and pulling the hatch forward away from the fuselage.
Remove the (4) rear hatch screws using a #2 Phillips screwdriver, and lift the rear hatch off the fuselage.
Required Tools and Fasteners
#2 Phillips Screwdriver
#1 Phillips Screwdriver

WING INSTALLATION
11
Required Tools and Fasteners
(QTY 2)
#2 Phillips Screwdriver
Front: (2) M3x15 Phillips head self-tapping screws
2.
3.
4.
1. Locate both wings and wing tubes.
Insert both wing tubes into the fuselage, noting that the short tube is installed at the front, and the long tube is installed
at the rear.
Slide a wing panel onto the wing tube until only a small gap is left. Connect the elevon servo wire, as well as the
LED JST wire, and fully seat the wing to the fuselage, being careful to avoid pinching the elevon and LED wires.
Secure each panel with (1) M3x15 self-tapping Phillips head screw at the front, and (1) M3.5x10 Phillips head self-
tapping screw at the rear. Repeat for the other side.
(QTY 2) Rear: (2) M3.5x10 Phillips head self-tapping screws

Secure a vertical fin in place from the bottom side of the wings by using a #2 Phillips screwdriver and (2) M3x15
Phillips self-tapping screws.
Locate the left and right vertical fins. Insert the vertical fin into the pocket in the main wing noting that the decals face
the wing tips, and the servos orient toward the middle of the aircraft. Be careful not to pinch the servo wire.
12
VERTICAL FIN INSTALLATION
Required Tools and Fasteners
(QTY 4)
#2 Phillips Screwdriver
(4) M3x15 Phillips head self-tapping screws
1.
2.

13
VERTICAL FIN INSTALLATION (CONTINUED)
The rear access hatch can be re-installed at this time using the screws removed when mounting your receiver on page 10.
4.
Push the servo wire and Remote Receiver wire (if applicable) into the slot in the wing and fuselage. Connect each
wire to their corresponding ports on Aura.
3.
Left Rudder - S4
Right Rudder - S5
Remote Receiver - Mini Port B
Left Rudder Right Rudder
Remote Receiver
NOSE INSTALLATION
Image of standard Nose installation
(using tape)
We recommend using clear tape in addition to the magnets too hold the removable nose to fuselage.

FPV Video Gear Installation (optional)
Mount your video transmitter and antenna as desired. A hole is provided in the top of the fuselage for your FPV antenna. An optional
video transmitter mount is available separately, and is secured to the main plywood tray using a #1 Phillips screwdriver and (2) M2 x
10 self-tapping screws that are provided with the mount. We used some hook and loop tape with a cable tie to secure the video
transmitter in place.
14
1.
(QTY 2)
(2) M2x10 Phillips head self-tapping screws
Required Tools and Fasteners
#1 Phillips Screwdriver
Hot Glue Gun (for mounting camera)
NOTE: The video transmitter mount is an optional accessory (FPM417010), and can be purchased at flexinnovations.com or
through your local Flex Innovations dealer.

Since camera sizes and weights vary, we recommend using
15
Due to the wide variety of video cameras available, we've provided a nose that may need to be modified slightly to fit
your particular camera. An easy way to mount your video camera is to simply use a couple small dots of hot glue on
the front and rear of the camera to secure it in place. Be sure to avoid getting glue on important lenses or electrical
components.
FPV Video Gear (continued)
2.
3. Route the camera wire through the slot in the front of the fuselage.
regular clear tape to secure the FPV nose in place as the magnets may not be strong enough to support the weight of the camera.

Install the hook side of adhesive-backed hook and loop tape to the plywood battery tray in the fuselage, and the loop side to your
battery.
16
BATTERY INSTALLATION
1.
2. Place the battery on the tray, and secure it in place with the provided hook and loop strap.

17
The LEDs on your aircraft are switchable via the transmitter and are designed to be powered by 12 volts (3S Li-Po) through the
6S JST-XH balance tab on the LED controller. By default, the LED controller is left unplugged from the receiver or Aura.
If the servo lead of the LED controller is not plugged into the Aura or a receiver (where it is not receiving a signal), the LEDs will
default in the ON position, allowing the aircraft to be flown with the LEDs on using a basic 5-channel transmitter or serial receiver
with no servo port or Satellite.
If you wish to switch your LEDs on and off from the transmitter, follow these simple steps:
1.
NOTICE
Plug the servo lead of the LED controller into an open channel on your receiver. We recommend channel 7.
2. Assign channel 7 (or the channel that you plugged the LED controller into) to a 2-position switch on your transmitter.
3. Verify the lights switch on and off when the assigned switch moves positions and the LEDs are powered. If you
want the switch to work in the opposite direction, simply reverse the channel in your transmitter.
WARNING
THE LEDs DRAW CURRENT FROM ONLY 3 CELLS OF THE BATTERY POWERING THEM. IF USING A
HIGHER CELL COUNT BATTERY FOR POWER, 3 OF THE CELLS WILL HAVE LOWER VOLTAGE THAN THE
OTHERS AT THE END OF EACH FLIGHT. LEAVE EXCESS VOLTAGE IN THE BATTERY AT THE END OF
EACH FLIGHT TO PREVENT THE OVER-DISCHARGING OF THE CELLS THAT POWER THE LEDs.
YOU MUST BALANCE CHARGE YOUR BATTERIES AFTER EACH FLIGHT THE LED CONTROLLER IS
POWERED BYANYTHING OTHER THAN A 3 CELL BATTERY.
YOU MUST USE A SERIAL RECEIVER WITH A WORKING CHANNEL 7 (AUXILIARY 2) PORT.
WARNING
DO NOT LEAVE THE BATTERY PLUGGED INTO THE LED CONTROLLER FOR EXTENDED PERIODS OF TIME.
DOING SO CAN DAMAGE THE BATTERY.
LED
CONTROLLER
3-6 cell Li-Po
CONNECTING A BATTERY TO THE LED CONTROLLER
NOTE: Black wire is Negative (-), other wires are positive (+).
Incorrect connection can result in failure of the LED controller
and/or the LED strips.

CENTER OF GRAVITY VERIFICATION
185mm
170mm
Trailing Edge of Center
Fuselage section
PROPELLER INSTALLATION
The center of gravity (CG) is measured from the trailing edge of the fuselage near the centerline of the aircraft.
The CG range is from 170mm to 185mm (6-11/16-inches to 7-9/32 inches) when measured as depicted in the image above.
174mm (6-27/32-inches) is the optimum location for all types of flying.
Do not fly the Pirana with a CG further aft than 170mm (6-11/16-inches), as the aircraft can become unstable.
Required Tools and Fasteners
NOTE: The propeller nut is left-hand threaded.
Turn the nut counter-clockwise to tighten, and
clockwise to loosen.
1. Locate the propeller and propeller nut. Install the propeller on to the motor shaft with the convex side facing forward.
Use an adjustable wrench to tighten the propeller nut.
Adjustable Wrench

Refer to the chart below to determine the proper control surface directions.
If controls are reversed, DO NOT REVERSE CONTROLS IN TRANSMITTER OR IN THE AURA CONFIG TOOL. Email us
at [email protected] for corrective action. Note that BOTH the Transmitter Control Direction Test AND the
Flight Controller Sensor Direction Test MUST BOTH BE PASSED! IF ONE DOES NOT PASS, DO NOT FLY!
AILERON
RUDDER ELEVATOR
Transmitter
Command
Proper Control
Stick Left
Stick Right
Stick Forward
Stick Aft
Stick Left
Stick Right
CONTROL DIRECTION TEST