Horizon Hobby UMX Carbon Cub SS User manual

Instruction Manual
Bedienungsanleitung
Manuel d’utilisation
Manuale di Istruzioni
UMX™ Carbon Cub SS

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Age Recommendation: Not for children under 14 years. This is not a toy.
WARNING: Read the ENTIRE instruction manual to become familiar with the features of the
product before operating. Failure to operate the product correctly can result in damage to the product,
personal property and cause serious injury.
This is a sophisticated hobby product. It must be operated with caution and common sense and
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. This product is not intended
for use by children without direct adult supervision. Do not attempt disassembly, use with incompatible
components or augment product in any way without the approval of Horizon Hobby, Inc. 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.
Meaning of Special Language:
The following terms are used throughout the product literature to indicate various levels of potential
harm when operating this product:
NOTICE: Procedures, which if not properly followed, create a possibility of physical property damage AND
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 superficial injury.
NOTICE
All instructions, warranties and other collateral documents are subject to change at the sole discretion
of Horizon Hobby, Inc. For up-to-date product literature, visit www.horizonhobby.com and click on the
support tab for this product.

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The E-flite®UMX™ Carbon Cub SS BNF is a feature-rich scale BNF model that’s an escape from the ordinary.
Its high-output brushless power system will allow you to leap from tight spots and, with its fully-functional
flaps, is simply a joy to fly. Large credit for its gentle manners go to the onboard AS3X™system, which
makes handling super-smooth, even in moderate winds, and provides rock solid control agility. Even though
your new model is fully assembled, please read and follow this manual completely to be sure you’re ready
to take full advantage of what this awesome RC aircraft has to offer.
To register your product online, go to www.e-fliterc.com
Table of Contents
Preflight Checklist.................................................4
AS3X™System Delivers
Breakthrough Performance ..................................4
Charging Warnings................................................4
Charging the Battery.............................................5
Transmitter and Receiver Binding .........................6
Installing the Flight Battery ..................................6
Arming the ESC ....................................................7
Low Voltage Cutoff (LVC).......................................7
Control Centering..................................................8
Settings for Control Horns.....................................8
Adjusting Center of Gravity (CG) ............................9
Optional Tow Plate Installation ............................10
Towing................................................................10
Tips for Towing ...................................................11
Optional Float Installation....................................12
Flying Tips and Repairs.......................................13
Additional Safety Precautions and Warnings........14
Service of Power Components ............................15
Opening the Fuselage .........................................16
Troubleshooting Guide ........................................16
Troubleshooting Guide (Continued)......................17
Limited Warranty ................................................18
Warranty and Service Information.......................19
Compliance Information for the European Union..19
Replacement Parts..............................................75
Optional Parts and Accessories ...........................76
Parts Contact Information ...................................77
BL180 (Brushless) Outrunner Motor,
2500Kv (EFLUM180BL2)
DSM2®/DSMX®6Ch Ultra Micro
AS3X™Receiver BL-ESC (EFLU4864)
(3) 2.3-Gram Performance Linear
Long Throw Servos (SPMSA2030L)
(2) 2.3-Gram Linear Long Throw
Offset Servos (SPMSA2030LO)
Battery: 180mAh 2S 20C Li-Po
(EFLB1802S20)
Battery Charger: 2S 7.4V Li-Po
(EFLUC1007)
Recommended Transmitter:
Full Range DSM2®/DSMX®(DX4e and up)
Needed to Complete
Installed
15.7 in (398mm)
24 in (610mm)
3.17 oz (90 g)

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AS3X™System Delivers
Breakthrough Performance
Horizon Hobby has always made RC sport, scale
and unique aircraft with the kind of performance
experts appreciate. Now the exclusive Artificial
Stability – 3 aXis (AS3X) system helps take
performance expectations in ultra micro aircraft a
quantum leap higher.
Based on the successful use of MEMS sensor
technology within the AS3X Stabilization System
essential to Blade® ultra micro flybarless
helicopters, the specifically tuned AS3X System
for airplanes helps invisibly correct for turbulence,
torque and tip stalls when encountered.
Furthermore, the outstanding control agility delivers
an ultra smooth, locked-in feel that obeys your
every command with performance that’s natural
feeling. It’s so gratifying, in fact, that it’s as though
you’re the RC pilot of an expertly tuned, giant-scale
model.
AS3X will change the way you’ll want to fly now and
in the future. To see what we mean, go to
www.E-fliteRC.com/AS3X.
Preflight Checklist

1. Charge flight battery.
2. Install flight battery in aircraft
(once it has been fully charged).
3. Bind aircraft to transmitter.
4. Make sure linkages move freely.
5. Perform Control Direction Test with
transmitter.

6. Adjust center of gravity.
7. Perform a radio system Range Check.
8. Find a safe and open area.
9. Plan flight for flying field conditions.
Charging Warnings
The included battery charger (EFLUC1007) has been
designed to safely charge the Li-Po battery.
CAUTION: All instructions and warnings must
be followed exactly. Mishandling of Li-Po batteries
can result in a fire, personal injury, and/or property
damage.
• By handling, charging or using the included Li-Po
battery, you assume all risks associated with
lithium batteries.
• If at any time the battery begins to balloon or
swell, discontinue use immediately. If charging
or discharging, discontinue and disconnect.
Continuing to use, charge or discharge a battery
that is ballooning or swelling can result in fire.
• Always store the battery at room temperature in a
dry area for best results.
• Always transport or temporarily store the battery
in a temperature range of 40–120º F (4.44 -
48.88º C). Do not store battery or aircraft in a car
or direct sunlight. If stored in a hot car, the battery
can be damaged or even catch fire.
• Always charge batteries away from flammable
materials.
• Always inspect the battery before charging and
never charge damaged batteries.
• Always disconnect the battery after charging, and
let the charger cool between charges.
• Always constantly monitor the temperature of the
battery pack while charging.
• ONLY USE A CHARGER SPECIFICALLY DESIGNED
TO CHARGE LI-PO BATTERIES. Failure to charge
the battery with a compatible charger may cause
fire resulting in personal injury and/or
property damage
• Never discharge Li-Po cells to below 3V
under load.
• Never cover warning labels with hook and
loop strips.
• Never leave charging batteries unattended.
• Never charge batteries outside
recommended levels.
• Never attempt to dismantle or alter the charger.
• Never allow minors to charge battery packs.
• Never charge batteries in extremely hot or cold
places (recommended between 40--120° F or
4.44 - 48.88° C) or place in direct sunlight.

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Your aircraft comes with a 2-Cell 7.4V 180mAh 20C
Li-Po battery and a Celectra™2S 7.4V DC Li-Po
Charger that requires a 12V (11V-14V) DC power
source.
Refer to the battery warnings. It is recommended
to charge the battery pack while you are inspecting
the aircraft. The flight battery will be required to
confirm proper aircraft operation in future steps.
Please visit www.horizonhobby.com for optional
battery adapters.
Charging the Battery
The Battery Charging Process
1. Charge only batteries that are cool to the touch and are not damaged. Look at the battery to make sure it is not
damaged e.g., swollen, bent, broken or punctured.
2. The connector of the battery is specifically designed to allow it to fit into the charge port one way to prevent
reverse polarity connection. However, check for proper alignment and polarity before proceeding to the next step.
3. Gently press the battery connector into the charge port located on the front of the charger.
4. When you make the connection successfully, the green LED blinking on the charger slows, indicating
proper connection.
5. Press the button on the charger. The red LED will illuminate, indicating charging has begun.
6. Charging a fully discharged (not over-discharged) 180mAh battery takes approximately 50–60
minutes at the included charger’s 300mA charge rate. The included battery can be charged at a rate
of up to 3C (540mA).
7. When the battery is fully charged, the green LED will turn solid.
8. Always unplug the battery from the charger immediately upon completion of charging.
CAUTION: Overcharging a battery can cause a fire.
2S 7.4V 180mAh 20C
Lithium Polymer Battery
CAUTION: Only use a charger specifically designed to charge a Li-Po battery. Failure to do so could
result in fire causing injury or property damage.
CAUTION: Never exceed the recommended charge rate.
LED Functions under normal operation
1. Green LED blinking with power connected but without battery................................... Standby
2. Green LED blinking .................................................................................................... Battery is connected
3. Blinking Red LED at varying speeds ........................................................................... Charging
4. Red and Green LED blinking simultaneously............................................................... Balancing
5. Solid Green LED ....................................................................................................... Full Charge
6. Red and Green LED flashing rapidly ........................................................................... Error

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Transmitter and Receiver Binding
Binding is the process of programming the receiver of the control unit to recognize the GUID (Globally
Unique Identifier) code of a single specific transmitter. You need to ‘bind’ your chosen SpektrumTM DSM2™/
DSMX®technology equipped aircraft transmitter to the receiver for proper operation.
Any full range JR®or Spektrum DSM2/DSMX transmitter can bind to the AS3X™DSM2/DSMX®receiver.
Please visit www.bindnfly.com for a complete list of compatible transmitters.
NOTICE: When using a Futaba®transmitter with a Spektrum DSM module, reversing the throttle channel
is required.
Binding Procedure
1. Refer to your transmitter’s unique instructions for binding to a receiver.
2. Make sure the flight battery is disconnected from the aircraft.
3. Power off the transmitter.
4. Connect the flight battery in the aircraft. The receiver LED will begin to flash rapidly (typically after 5 seconds).
5. Make sure the transmitter controls are at neutral and the throttle and throttle trim are in the low position.
6. Put your transmitter into bind mode. Refer to your transmitter’s manual for binding button or
switch instructions.
7. After 5 to 10 seconds, the receiver status LED will become solid, indicating that the receiver is bound to the
transmitter. If the LED does not turn solid, refer to the Troubleshooting Guide at the back of the manual.
For subsequent flights, power on the transmitter for 5 seconds before connecting the flight battery.
Installing the Flight Battery
1. Open the battery hatch.
2. Attach the flight battery to the hook and loop
strip (A) in the battery compartment. See the
Adjusting the Center of Gravity instructions for
the battery’s position.
3. Connect a fully charged flight battery and close
the battery hatch, then place the aircraft on the
ground out of the wind. Ensure the aircraft
is immobile for 5 seconds so the AS3X
system initializes correctly. See Arming the
ESC instructions for correct connection of the
battery to the ESC.
If using a different battery than the recommended
2-Cell 7.4V 180mAh 20C Li-Po, you will need to
apply a circle of hook and loop fastener to the
battery in order to hold the battery in place.
CAUTION: Always disconnect the Li-Po
battery from the aircraft receiver when not flying to
avoid over-discharging the battery. Batteries
discharged to a voltage lower than the lowest
approved voltage may become damaged, resulting
in loss of performance and potential fire when
batteries are charged.
A

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1 2 3
If you accidentally connect the battery while the throttle is fully raised, the ESC will enter programming
mode. Disconnect the battery immediately.
The AS3X system will not activate until the throttle stick or trim is increased for the first time. Once the AS3X
is active, the control surfaces may move rapidly and noisily on the aircraft. This is normal.
AS3X will remain active until the battery is disconnected.
CAUTION: Always keep hands away from the propeller. When armed, the motor will turn the propeller
in response to any throttle movement.
Arming the ESC
Arming the ESC also occurs after binding as previously described, but subsequent connection of a flight
battery requires the steps below.
Lower throttle and throttle
trim to lowest settings.
Power on the Transmitter
then wait 5 seconds
Install flight battery and
connect it to the ESC.
Keep plane immobile
and away from wind for
5 seconds.
Series of tones
Continuous LED
Low Voltage Cutoff (LVC)
When a Li-Po battery is discharged below 3V per
cell, it will not hold a charge. The aircraft’s ESC
protects the flight battery from over-discharge using
Low Voltage Cutoff (LVC). Before the battery charge
decreases too much, LVC removes power supplied
to the motor. Power to the motor quickly decreases
and increases, showing that some battery power is
reserved for flight control and safe landing.
When the motor power pulses, land the aircraft
immediately and recharge the flight battery.
Disconnect and remove the Li-Po battery from the
aircraft after use to prevent trickle discharge. Before
storage, charge the Li-Po battery to full capacity.
During storage, make sure the battery charge does
not fall below 3V per cell.
Tip: Due to the quiet nature of the aircraft, you may
not hear the pulsing of the motor.
For your first flights, set your transmitter timer or a
stopwatch to 4 minutes. Adjust your timer for longer
or shorter flights once you have flown the model.
Flights of 6 minutes or more are achievable if using
proper throttle management.
NOTICE: Repeated flying to LVC will damage
the battery.

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Settings for Control Horns
The following illustration shows the factory settings
for linkages on the control horns. After flying, your
may choose to carefully adjust the linkage positions
for the desired control response.
Tip: We recommend you move the rudder linkage
to the second innermost hole in the rudder horn for
taxiing with floats.
Aileron Elevator Rudder
Before the first flights, or in the event of an
accident, make sure the flight control surfaces
are centered. Adjust the linkages mechanically if
the control surfaces are not centered. Use of the
transmitter sub-trims may not correctly center the
aircraft control surfaces due to the mechanical
limits of linear servos.
1. Make sure the control surfaces are neutral
when the transmitter controls and trims are
centered. The transmitter sub-trim must
always be set to zero.
2. When needed, use a pair of pliers to carefully
bend the metal linkage (see illustration).
3. Make the U-shape narrower to make the
connector shorter. Make the U-shape wider
to make the linkage longer.
Centering Controls After First Flights
For best performance with AS3X, it is important
that excessive trim is not used. If the aircraft re-
quires excessive transmitter trim (4 or more clicks
of trim per channel), return the transmitter trim to
zero and adjust the linkages mechanically so that
the control surfaces are in the flight
trimmed position.
Control Centering
When using
float set

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Control Direction Test
You should bind your aircraft and transmitter
before doing these tests. Move the controls on the
transmitter to make sure aircraft control surfaces
move correctly and in the proper direction.
Make sure tail linkages move freely and that paint
or decals are not adhered to them.
Flap Function Test
The flap servo is connected to channel 5 (Gear)
of the receiver. The flaps should remain in the
UP position for the first few flights until you are
comfortable with the aircraft.
Use the Gear switch on your transmitter to move
the flaps once you are ready to begin experimenting
with flap control.
Tip: If you are using a computer radio to fly your
UMX Carbon Cub SS, we recommend that you cre-
ate a mix to compensate for pitching up tendencies
when the flaps are in the down position. Enter the
mix menu of your radio, and create a mix so that
the Gear Channel is the master channel, and the
Elevator channel is the slave. Follow the percent-
ages in the table to the right for the total amount
of travel.
Flap/Elev
Mix
Flaps Up Flaps Down
Down
Elevator 0% 40%
Adjusting Center of Gravity (CG)
The CG location is 27mm back from the leading
edge of the wing at the root. This CG location has
been determined with the included 2S 180mAh 7.4V
Li-Po battery installed in the front of the
battery cavity.
The battery tray is oversized to allow for Center of
Gravity adjustment. Start by placing the battery at
the front edge of the battery tray with the connector
plug facing the rear of the aircraft. Adjust as needed
by sliding the battery back or forward.
27mm

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Optional Tow Plate Installation
1. Align the two screws and holes in the tow
plate with the holes in the mount on top of
the fuselage. The hole for the tow line in the
bracket should be toward the back of the
aircraft (see illustration).
2. Fully tighten the screws on the fuselage. Make
sure that you do not over tighten the screws.
3. Tie the tow line to the tow plate using a non-
slip knot after installing the tow plate.
Wind
28 ft (8.5 m)
Recommended Aircraft
Alignment for Takeoff
Towing
Towing with the Carbon Cub is only recommended
for advanced pilots. When towing a sailplane with
the Carbon Cub, be sure to fly in a large, open
space.
The Carbon Cub is designed to tow the E-flite®
UMX™ ASK-21 (EFLU1280) sailplane from a smooth
runway. A tow line (approximately 28 feet (8.5 m)
long) is included with the UMX™ASK-21 or is
available separately (EFLU1257).
1. Position both aircraft near each other on your
runway, facing into the wind.
2. Tie the tow line to the tow plate on the Carbon
Cub. Tie the other end of the tow line to the
release mechanism under the nose of the
E-flite UMX ASK-21 (see tow mechanism
installation in the UMX ASK-21 manual).
3. Space the aircraft apart so there is no slack in
the tow line. (If there is slack, it can result in
damage to one or both of the aircraft.)
4. Ensure that the tow line is above the Carbon
Cub’s horizontal tail so the Carbon Cub can
pull the sailplane into the air safely.
5. Quickly apply power to the Carbon Cub once
both pilots are ready for takeoff.
6. Keep the Carbon Cub on the ground until the
sailplane is off the ground and is 2–3 ft (0.9–
1.2 m) above the Carbon Cub.
7. Slowly apply elevator to lift the Carbon Cub off
of the ground. Be sure to keep the Carbon Cub
under the sailplane until you have reached your
release altitude.