UMX™ ASK-21
Instruction Manual
Bedienungsanleitung
Manuel d’utilisation
Manuale di Istruzioni
EN
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.
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 superfi cial injury.
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.
Age Recommendation: Not for children under 14 years. This is not a toy.
2
Thank you for purchasing the E-fl ite® UMX™ ASK-21 scale RC sailplane. A fi rst of its kind in its size class
is a fully functional 4-channel aircraft capable of loops and rolls, as well as traditional thermal and slope
soaring. Lightweight and sleek, your new UMX ASK-21 is equipped with AS3X
tuned for the many variations of fl ight conditions you’ll encounter, so that you get the smooth experience
similar to that of fl ying a giant-scale sailplane. And like the giant-scale sailplanes, this UMX ASK-21 is
tow hook equipped making it aerotow capable when paired with the powerful E-fl ite UMX Carbon Cub SS
(EFLU1180). Another strong benefi t of the AS3X
tow line or Hi-start and help prevent common issues, such as heading loss, which can make smooth fl ight
diffi cult. Please be sure to read through this manual carefully so that you can successfully enjoy all the
benefi ts this outstanding ultra-micro model has to offer.
®
is its outstanding ability to stabilize the glider while on a
®
System technology specially
Table of Contents
Prefl ight Checklist .................................................4
Charging Warnings................................................4
Charging the Battery .............................................5
Wing Installation ...................................................6
Transmitter and Receiver Binding .........................7
Installing the Flight Battery ..................................7
Initializing AS3X ....................................................8
Control Centering ..................................................8
Settings for Control Horns .....................................8
Control Direction Test ............................................9
Dual Rates ............................................................9
Adjusting Center of Gravity (CG) ............................9
Hi-Start Hook Installation ....................................10
Hi-Start Launch ..................................................10
Towing ................................................................12
Tips for Towing ...................................................13
Tow Release Installation......................................13
Flying Tips and Repairs .......................................14
Additional Safety Precautions and Warnings ........15
Troubleshooting Guide ........................................15
Troubleshooting Guide (Continued) ......................16
Limited Warranty ................................................17
Warranty and Service Information .......................18
Compliance Information for the European Union ..18
Replacement Parts .............................................70
Optional Parts and Accessories ..........................71
Parts Contact Information ...................................71
EN
17 in (432mm)
2.56 oz
(72.5 g)
Installed
Receiver: DSM2/DSMX 6Ch UM AS3X
Receiver ESC (EFLU1264)
Servos: (1) 2.3-Gram Performance Linear
Long Throw Servo (SPMSA2030L)
(2) 2.3-Gram Linear Long Throw
Offset Servo (SPMSA2030LO)
(2) (SPMSA2030L) on the board
Included
Battery: 150mAh 1S 25C Li-Po
(EFLB1501S25)
Battery Charger: 1S 3.7V Li-Po
(EFLC1000)
33.9 in (860mm)
Additional Components:
4 AA Batteries
Tow Line (EFLU1257)
Tow Plate (EFLU1255)
Hi-Start and Stake (EFLU1258)
Hi-Start Hook and Screw
(EFLU1255)
Needed to Complete
Recommended Transmitter:
Spektrum™ Full range DSM2®/DSMX® with
dual-rates (DX4e and up)
To register your product online, go to www.e-fl iterc.com
3
ENEN
Prefl ight Checklist
1. Charge fl ight battery.
2. Install fl ight 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.
AS3X Stabilization 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
Charging Warnings
The included battery charger (EFLC1000) 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 fi re, 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 fi re.
• 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 (5-48º 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 fi re.
• Always charge batteries away from fl ammable
materials.
6. Set dual rates.
7. Adjust center of gravity.
8. Perform a radio system Range Check.
9. Find a safe and open area.
10. Plan fl ight for fl ying fi eld conditions.
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.
• Always inspect the battery before charging and
never charge dead or 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
fi re 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
5-48° C) or place in direct sunlight.
4
Charging the Battery
Your UMX ASK-21 comes with a 1S 3.7V Li-Po
Battery Charger and a 1S Li-Po battery. You should
only charge your 1S Li-Po battery with a Li-Po
charger, such as the included charger or the E-fl ite
Celectra™ 4-port charger (EFLC1004).
Refer to the battery warnings. It is recommended
to charge the battery pack while you are inspecting
the aircraft. The fl ight battery will be required to
confi rm proper aircraft operation in future steps.
Please visit www.horizonhobby.com for optional
battery adapters.
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. Remove the cover on the bottom of the charger and install four of the included AA batteries, noting proper polarity.
Replace the cover after the AA batteries are installed.
3. Slide the battery into the slot on the charger. The end cap of the battery is specifi cally designed to allow the battery to fi t into the slot one way (usually with the label on the battery facing outward) to prevent reverse polarity
connection. However, check for proper alignment and polarity before proceeding to the next step.
4. Gently press the battery and its connector into the charge jack/connector located at the bottom of the slot in
the charger.
5. When you make the connection successfully, the LED on the charger turns solid red, indicating charging
has begun.
6. Charging a fully discharged (not over-discharged) 150mAh battery takes approximately 30–40 minutes. As the
battery nears full charge, the LED begins to blink.
7. When the battery is fully charged, the LED blinks approximately every 20 seconds or goes out entirely.
If the LED stays on when the battery is removed, the AA batteries in the charger are low.
8. Always unplug the battery from the charger immediately upon completion of charging.
CAUTION: Overcharging a battery can cause a fi re.
®
EN
CAUTION: Only use a charger specifi cally designed to charge a Li-Po battery. Failure to do so could
result in fi re causing injury or property damage.
CAUTION: Never exceed the recommended charge rate.
CAUTION: Only use an E-fl ite 6V power supply (EFLC1005) with this charger. DO NOT use a 12V
power supply or property damage and injury could occur.
5
EN
Wing Installation
1. Lift the front of the canopy (A) and pull it
forward off the fuselage.
2. Align the 4 holes in the wing (B) with the 4
screw posts in the fuselage.
3. Secure the wing to the fuselage by fully
tightening the 4 included screws (C).
4. Connect the aileron leads to the aileron
ports on the receiver. Left aileron servo needs
to be connected to the front port (D), right
aileron servo needs connected to the rear port
(E). The servos leads are labeled “L” and “R”
for your convenience.
5. Be sure to check proper control directions
before your first flight. You should not need to
reverse any control surfaces.
6. Reinstall the canopy on
the fuselage.
A
Disassemble in reverse order.
B
C
Top View
D
E
6
Transmitter and Receiver Binding
Binding is the process of programming the receiver of the control unit to recognize the GUID (Globally
Unique Identifi er) code of a single specifi c transmitter. You need to ‘bind’ your chosen Spektrum DSM2/DSMX
technology equipped aircraft transmitter to the receiver for proper operation.
Any JR® or Spektrum DSM2/DSMX transmitter can bind to the AS3X DSM® receiver. For best fl ight
performance of the UMX ASK-21, it is recommended that you use a transmitter with dual rates. Please visit
www.bindnfl y.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 fl ight battery is disconnected from the aircraft.
3. Power off the transmitter.
4. Connect the fl ight battery in the aircraft. The receiver LED will begin to fl ash 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 fl ights, power on the transmitter for 5 seconds before connecting the fl ight battery.
EN
Installing the Flight Battery
1. Lift the front of the canopy and pull the canopy
forward off the fuselage.
2. Install the flight battery onto the hook and loop
strip (A) in the battery compartment as far
forward as possible.
3. Refer to Initializing AS3X instructions for
connecting the battery to the receiver.
4. Install the canopy on the fuselage
Do not operate the ASK-21 for longer than
25 minutes on fully charged battery.
NOTICE: Always ensure that the battery is secured
in the aircraft using hook and loop tape.
CAUTION: Always disconnect the Li-Po
battery from the aircraft receiver when not fl ying 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 fi re when
batteries are charged.
A
7
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