EF Helicopter Mini-Stinger EF008 User manual

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TABLE OF CONTENTS
Thank you for purchasing the EF Helicopter’s Mini-Stinger EP 2.4GHz RTF Helicopter.
The Mini-Stinger is a high-quality 2.4GHz electric-powered co-axial helicopter that's perfect for the
beginner to learn to y, or for the more experienced pilot to simply have fun. The Mini-Stinger is
designed specically to y indoors, either in your house or other indoor area. The helicopter is
powered by two electric motors which drive a co-axial rotor head which results in a very stable ying
model that makes learning to y much easier. In addition, an innovative 2.4GHz digital transmitter
with LCD and integral Li-Po charger for the helicopter's onboard battery is included.
Before ying your new helicopter, please carefully read through this Instruction Manual in its entirety.
Doing so will ensure your success the rst time around. As you can see, there's not much to it!
l Read the Safety Warnings and Important Information on Pages 3 through 5
l Identify the Parts and Familiarise Yourself with Your New Helicopter
l Charge the Li-Po Battery
l Test Your Helicopter and Make Final Pre-Flight Checks
l Become Familiar with How Your Helicopter Flies
l Choose Your Flying Area and Fly!
INTRODUCTION
WARRANTY TERMS
In North America
Your EF Helicopters Mini-Stinger EP 2.4GHz RTF Helicopter is warranted against manufacturer
defects in materials and workmanship, at the date of purchase.
In the United Kingdom/Europe
Your EF Helicopters Mini-Stinger EP 2.4GHz RTF Helicopter is warranted against manufacturer defects
in materials and workmanship for a period of 1 (one) year from the date of purchase. Warranty
service will be provided within one (1) year of the date of purchase only if you are able to provide
the original or a copy of the original dated sales receipt. This does not affect your statutory rights.
EF Helicopters guarantees this kit to be free from defects in both material and workmanship, at the
date of purchase. This does not cover any component parts damaged by use, misuse or modication.
In no case shall EF Helicopter's liability exceed the original cost of the purchased kit.
In that EF Helicopters has no control over the nal assembly or material used for nal assembly,
no liability shall be assumed for any damage resulting from the use by the user of the nal
user-assembled product. By the act of using the nal user-assembled product, the user accepts
all resulting liability.
Introduction ................................................ 2
Warranty Terms........................................... 2
Customer Service Information ...................... 3
Safety Warnings and Important Information .. 3
Kit Contents and Parts Identication ............. 5
Becoming Familiar with Your Helicopter ......... 6
Preparing to Fly Your Helicopter ................... 9
Flying Your Helicopter .................................11
Troubleshooting Guide ................................16
Exploded View Assembly Drawing ................17
Replacement Parts List ...............................18
Warranty Service Information ......................19

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Global Hobby Distributors will not disclose the information it collects to outside parties.
We do not sell, trade, or rent your personal information to others. Your privacy is important to us.
Check out our support website at http://globalservices.globalhobby.com. There you will nd public message boards frequented
by other modelers and our technical support staff. This is a great place to get quick answers and advice on your new product.
To enable us to better serve your needs, please include your Email address with any correspondence you send to us. Your Email
address will be added to our Customer Service Database so you will automatically receive free updates and tech notices for your
particular product. You will also receive repair status updates (if applicable) and other important information about your product
as it becomes available.
IMPORTANT INFORMATION ABOUT YOUR EMAIL ADDRESS
CUSTOMER SERVICE INFORMATION
SAFETY WARNINGS AND IMPORTANT INFORMATION
l This model is not a toy, and it should not be treated as such. Children under 14 years of age
should not use this product unless closely supervised by an adult.
l This model is powered using a 1 cell Lithium Polymer (Li-Po) battery. In addition to these General
Warnings, please read and understand the Li-Po battery warnings on page 4.
l Fly only indoors or in an area outside that is free of ANY wind at ALL times. Attempting to y
your model in any type of wind will make your model difcult or impossible to control.
l Even though this model is powered by electric motors it doesn't mean that you shouldn't exercise
caution when ying and operating it. You must use caution during use.
l Always be conscious of the spinning rotor blades. Be careful not to allow loose clothing to be
drawn into the spinning rotor blades.
l Because this model is operated by radio control, it is important to make sure you are always
using fresh and/or fully charged batteries. Never allow the batteries to run low or you could lose
control of the model.
l Do not allow any of the electrical components to get wet or electrical damage may occur.
l You should complete a successful check of the radio control system prior to each new day of
ying, or prior to the rst ight of a new or repaired model.
l If your model gets dirty, do not use any solvents to clean it. Solvents may damage the plastic.
l We strongly suggest that when you rst begin ying your model that you perform only basic
manoeuvres, such as hovering, until you are more familiar with the setup and ight characteristics
of the model. This will give you time to feel comfortable with the way the model reacts to control
inputs and power.
l Never y your helicopter in the street or at night. Always y in an area free of obstructions.
l When ying, make sure any spectators are behind you.
l Do not use your model to chase or harass pets or other animals.
n
General Warnings
For customer service questions or comments, please contact your local distributor. For information
about returning your product for warranty consideration, please see page 19.
In Europe
Ripmax Ltd.
241 Green Street
Eneld, EN3 7SJ, U.K.
Phone: [phone]
Fax: [phone]
Website: http://www.ripmax.com
In North America
Global Services
18480 Bandilier Circle
Fountain Valley, CA 92708
Phone: [phone]
Fax: [phone]
Email: [e-mail]

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SAFETY WARNINGS AND IMPORTANT INFORMATION
Lithium Polymer (Li-Po) batteries are signicantly more volatile than alkaline or NiCd/NiMH
batteries used in RC applications. All instructions and warnings must be followed closely.
Mishandling of Li-Po batteries can result in re.
n
Lithium Polymer (Li-Po) Battery Warnings
l Instructions about charging the Li-Po battery can be found on pages 9 and 10.
l DO NOT attempt to charge the Li-Po battery with any charger other than the integrated charger
in the transmitter that is included with your model or the optional AC or Mains charger for your
region listed on page 18.
l DO NOT leave the Li-Po battery unattended during the charging process.
l ALWAYS remove the Li-Po battery from the transmitter charger when not in use.
l ALWAYS charge the Li-Po battery on a re-resistant surface and never charge the Li-Po battery
near any ammable material.
l DO NOT use or charge the Li-Po battery if it's hot to the touch.
l DO NOT leave the Li-Po battery in direct sunlight or in a hot car or storage area, or get the Li-Po
battery wet or expose it to moisture.
l DO NOT short-circuit the Li-Po battery.
l DO NOT leave the Li-Po battery plugged into the model when not in use. The Li-Po battery should
be stored in a re-proof container.
l ALWAYS let the Li-Po battery cool between uses and charging.
l INSPECT the Li-Po battery before each use for swelling or other malformation. If the Li-Po battery
is damaged, it should be discarded. For more information, see page 5.
l DO NOT poke, bend or damage the Li-Po battery. The Li-Po battery's outer casing is soft and can
be damaged.
l DO NOT allow the Li-Po battery to ever exceed 160ºF (71ºC) for any reason.
n FCC Information
This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the operating
instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
l Reorient or relocate the receiving antenna. Increase the separation between the equipment and
the receiver. Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected. Consult the dealer or an experienced technician for help.
This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada.
Operation is subject to the following two conditions:
1) This device may not cause harmful interference, and....
2) This device must accept any interference received, including interference that may cause
undesired operation.

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n Lithium Polymer (Li-Po) and 'AA' Alkaline Battery Instructions for Disposal
This product must not be disposed of with other household waste. Instead, it is the user's
responsibility to dispose of this product by handing it over to a designated collection point
for the recycling of waste electrical and electronic equipment. The separate collection and
recycling of this product at the time of disposal will help to conserve natural resources and
ensure that it is recycled in a manner that protects human health and the environment.
For more information about where you can drop off this product for recycling, please
contact your local city or municipal ofce, your household waste disposal service, or where you
purchased the product.
KIT CONTENTS AND PARTS IDENTIFICATION
Remove the parts from the box and use the photo below to verify that your set contains all of the
correct parts.
SAFETY WARNINGS AND IMPORTANT INFORMATION
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1) 2.4GHz Digital Transmitter
2) Four 'AA' Alkaline Batteries for Transmitter
3) 1 Cell 110mAh Li-Po Battery for Helicopter
4) Small Philips Head Screwdriver
5) Mini-Stinger 2.4GHz EP RTF Helicopter
This set contains all of the parts and accessories necessary for ight. There is nothing else to purchase!
When the transmitter batteries are depleted, replace with four 1.5 volt 'AA' Alkaline batteries.
Do not dispose of the depleted 'AA' Alkaline batteries in household waste, but take them to
an approved recycling centre for disposal (see Safety Warnings and Important Informaton above).
If your set is missing a part, or if a part appears damaged, please contact
your local distributor using the Customer Service Information on page 3.
Rechargeable NiCd or NiMH batteries (purchased separately) can be used to power the transmitter.
However, they must be charged separately outside of the transmitter with a compatible charger
(available separately). The transmitter does not provide for onboard charging of the 'AA' batteries.

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BECOMING FAMILIAR WITH YOUR HELICOPTER
l The transmitter and the receiver operate in the 2.4GHz frequency band. The 2.4GHz connection
is determined by the transmitter and the receiver pair, therefore, unlike ordinary crystal-based
systems, the helicopter can be own without frequency conicts.
l Before takeoff, always conduct a bench test to make sure that the controls operate properly.
l The transmitter can be switched from Mode 2 (default) to Mode 1. For more information, see
pages 7 and 8.
l The transmitter and receiver are paired from the factory. If there is a problem and the transmitter
does not control the helicopter, the transmitter and receiver should be paired again. For more
information, see page 10.
l The receiver does not have an ON/OFF switch. When you plug the Li-Po battery into the helicopter,
the receiver will power up.
n
General Information
n Transmitter Features and Functions
1) Antenna
2) Li-Po Battery Charger with LED (On Back)
3) Throttle/Rudder Control Stick and Bind Button
4) Rudder Trim Button
5) Throttle Trim Button
6) LCD (Liquid Crystal Display)
7) Elevator Trim Button
8) Aileron Trim Button
9) Elevator/Aileron Control Stick
and Primary/Advanced Control Button
10) Transmitter Battery Cover (On Back)
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4 5 67 8
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2
10
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18
19
1715 16
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11) ON/OFF Switch
12) Transmitter Mode Display
13) Transmitter Battery Display
14) Throttle Trim Display
15) Rudder Trim Display
16) Throttle Power Percentage Display
17) Aileron Trim Display
18) Elevator Trim Display
19) Primary/Advanced Control Display
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BECOMING FAMILIAR WITH YOUR HELICOPTER
n Switching Transmitter Modes - Mode 2 to Mode 1
The transmitter can be switched from Mode 2 to Mode 1 to suit the user's preference. Mode 2 is
the default conguration. In Mode 2, the throttle and rudder controls are on the left control stick and
the aileron and elevator controls are on the right control stick as depicted in the photo on page 6. Mode
2 is typically used in North America and the U.K. Mode 1 places the throttle and aileron controls on
the right control stick and the elevator and rudder controls on the left control stick as depicted in the
photo on page 8. Mode 1 is more popular in Europe and is used in some parts of North America.
To switch from Mode 2 to Mode 1, follow the procedures below:
q Make sure that the transmitter is turned OFF.
q Remove the two screws from the antenna
mount on the back of the transmitter, then
remove the antenna mount.
n Helicopter Features
1) Flybar
2) Flybar Weights
3) Upper Main Rotor
4) Main Shaft
5) Lower Main Rotor
6) Swash Plate
7) Canopy
8) Landing Skids
9) Li-Po Battery
10) Main Gears
11) Main Motors
12) Tail Boom
13) Vertical Fin
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1
Do not y the Mini-Stinger without the
canopy installed. The helicopter will be
unstable if own without the canopy, and
in addition, the canopy helps protect the
components inside the helicopter during
a mishap.
For a list of replacement parts,
please see page 18.
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q Pull the antenna back so that it is straight
out, then rotate it 180º counter-clockwise and
angle it down into the moulded slot.
q Push the antenna down into the moulded
slot, then reinstall the antenna mount next
to the MODE 1 label that's moulded into the
transmitter and tighten the two screws to lock
the antenna into position.
BECOMING FAMILIAR WITH YOUR HELICOPTER
1) Antenna
2) Transmitter Battery Cover (On Back)
3) Elevator/Rudder Control Stick
and Primary/Advanced Control Switch
4) Rudder Trim Button
5) ON/OFF Switch
6) Elevator Trim Button
7) LCD (Liquid Crystal Display)
8) Throttle Trim Button
9) Aileron Trim Button
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4 6 78 9
5
11
12
18
17
1615
19
14
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10) Li-Po Battery Charger with LED (On Back)
11) Throttle/Aileron Control Stick and Bind Button
12) Transmitter Mode Display
13) Transmitter Battery Display
14) Elevator Trim Display
15) Rudder Trim Display
16) Aileron Trim Display
17) Primary/Advanced Control Display
18) Throttle Trim Display
19) Throttle Power Percentage Display
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2
10
Using the transmitter
in Mode 1 will change
the control layout to that
shown.
The transmitter must be
turned OFF and the Li-Po
battery removed from the
helicopter prior to changing
the Mode.

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PREPARING TO FLY YOUR HELICOPTER
n Installing the Transmitter Batteries
q Remove the battery cover from the back of
the transmitter.
q Install the four 'AA' Alkaline batteries into
the battery holder, being careful to make sure
that the polarity is correct (+/-) for each battery.
q Reinstall the battery cover, making sure it’s
rmly seated into place.
n Charging the Li-Po Battery
q Remove the Li-Po battery charger cover
from the back of the transmitter.
q Turn the transmitter ON. The LCD should
display. If it doesn't, check the polarity of the
batteries and/or replace the batteries with new
fresh batteries.
The Li-Po battery must be fully charged prior to ying. Before charging, please read the
Lithium Polymer (Li-Po) Battery Warnings section on page 4.
l The two metal contacts on the Li-Po battery must face toward the front of the charger when
installed for charging.
l If the green charging LED does not illuminate when the transmitter is turned ON, remove the
Li-Po battery and reinstall it the opposite direction.
l Ensure that the transmitter batteries have sufcient power to charge the Li-Po battery. At least
one bar should be displayed on the LCD Transmitter Battery Display.
l The charge time of the Li-Po battery will vary. It can take up to 30 minutes to recharge a
fully-discharged battery.
l Do not replace the Li-Po battery charger cover while the Li-Po battery is charging.

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q Slide the Li-Po battery into the charging
slot, making sure that the two metal contacts
on the Li-Po battery are toward the front of the
transmitter. The Charge LED should illuminate
solid green.
PREPARING TO FLY YOUR HELICOPTER
q Allow the Li-Po battery to fully charge. Once fully charged, the Charge LED will go out. At this time,
turn the transmitter OFF, remove the Li-Po battery, then reinstall the Li-Po battery charger cover.
n Primary/Advanced Control Switching
Your helicopter has two control settings - Primary and Advanced, allowing you to choose which
control setup suits your skill level. The current control setting is shown on the LCD as follows:
Primary - Half Circle Advanced - Solid Circle
l When set to Primary, the throttle curve is adjusted to make the helicopter easier to control. This
is recommended for beginners.
l When set to Advanced, the throttle curve is adjusted to make the helicopter more responsive
and more agile. This is recommended for more advanced pilots.
Until you’re familiar with ying the helicopter, we suggest using the Primary control setting.
q To change the Primary/Advanced control setting, turn the transmitter ON, then
press the Aileron/Elevator control stick down until you hear a 'click'. The transmitter
will beep once and the Primary/Advanced Control Display will change on the LCD.
The Primary/Advanced control setting can also be changed during ight.
If you're using Mode 1, press the Rudder/Elevator control stick down.
n Binding the Transmitter and Receiver
The transmitter and receiver have already been paired (the binding process) at the factory. You
will only need to follow these procedures if your transmitter and receiver are not communicating
and need to be paired again.
q Press and hold the Throttle/Rudder control stick down until you hear a 'click',
and at the same time, turn the Transmitter ON. The transmitter will beep continuously
and the LCD will display three dashes.
If you're using Mode 1, press the Throttle/Aileron control stick down.
Click!
Elevator/Rudder
Control Stick - Mode 2
Click!
Throttle/Rudder
Control Stick - Mode 2
q Release the control stick and plug the Li-Po battery into the helicopter. When paired, the
red LED in the helicopter will turn solid and the transmitter LCD will return to normal.
q Test the controls to ensure proper operation. If the controls do not operate properly, or
the red LED in the helicopter continues to blink rapidly, remove the Li-Po battery, turn the
transmitter OFF, then repeat the procedure again.

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If the red LED blinks continuously, verify that the transmitter is turned ON. If the transmitter
is turned ON, the transmitter and receiver will need to be paired again. See page 10.
As a safety precaution, the motor will not power up if the transmitter is turned ON with the
throttle control stick anywhere above
000 . The motor will turn on only after the throttle
control stick is pulled all the way back, then pushed forward again.
FLYING YOUR HELICOPTER
n Centering the Transmitter Trim Tabs and Powering On Your Helicopter
q Turn the transmitter ON.
q Check the four Trim Displays on the LCD to
ensure that each hash mark is centred. If they
are not, press the Trim Button that corresponds
to the hash mark(s) that is not centred either
up or down, or right or left, to centre the hash
mark(s).
q Pull the throttle control stick all the way back
and verify that 000 is displayed on the LCD.
If 000 is not displayed on the LCD, even
with the throttle control stick pulled all
the way back, press the bottom half of the
Throttle Trim Button until 000 is displayed.
q Carefully slide the Li-Po battery into the
bottom of the helicopter, making sure that the
two metal contacts are facing down. The red
LED in the helicopter will blink momentarily,
then should turn solid.
Centred Centred
CentredCentred
When powering on your helicopter, ALWAYS turn the transmitter ON rst, then plug the Li-Po
battery into the helicopter. When powering off your helicopter after use, unplug the Li-Po battery
from the helicopter rst, then turn the transmitter OFF.
If the red LED does not turn on after installing the Li-Po battery, remove the Li-Po battery
and reinstall it the opposite direction.
Press your thumb up against the front of the Li-Po battery holder, between the landing
skids, to support it while installing the Li-Po battery.
Mode 2

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MODE 2 - Default
FLYING YOUR HELICOPTER
n Control Operation
Use the information in this section to become acquainted with how to control your helicopter.
Throttle Rudder Elevator Aileron
Move Up Pivot Left Move Forward Move Right
Move Down Pivot Right Move Backward Move Left
MODE 1
Throttle Rudder Elevator Aileron
Move Up Pivot Left Move Forward Move Right
Move Down Pivot Right Move Backward Move Left
n Choosing an Area to Fly
When you're ready for your rst ight, you will want to select a relatively open indoor area that is
free of people and obstructions. While it is possible for experienced pilots to y the Mini-Stinger
in a small space due to its small size and controllability, we strongly recommend ying in an area
with at least 3-metres by 3-metres (10ft by 10ft) of oor space and no less than 2.5-metres (8ft)
ceilings. The oor surface should not be obstructing (e.g., no heavy carpet). Once you have trimmed
your helicopter and become familiar with its ight characteristics and handling capabilities, you will
be able to y in smaller, less open areas.
The Mini-Stinger is designed and intended to be own INDOORS ONLY. Attempting to y
your helicopter outdoors, even without apparent wind, will result in a difcult to control
model and probable crash.

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n Flying Procedures
FLYING YOUR HELICOPTER
q Turn the transmitter ON, then plug the Li-Po battery into the helicopter. The red LED in the
helicopter should turn solid and the controls should operate when you move the control sticks.
q Place the helicopter on the oor in the middle of the room. Stand approximately 2-metres (6ft)
away from the helicopter, behind the tail.
q To take off, push the throttle control stick up slowly until the helicopter begins to get 'light', then
advance the throttle control stick a little more until the helicopter lifts off. Watch closely what the
helicopter is doing and make any corrections with the control sticks to keep the helicopter stable
and in one general area.
q When you're rst beginning, you should learn to hover the helicopter, moving the throttle control
stick forward and backward to control the height of the helicopter. For now, try to always keep it
about 60cm (2ft) off the ground. Move the rudder control stick right or left to keep the nose of
the helicopter pointed away from you. If the helicopter slides to the right or to the left, move the
aileron control stick left of right to keep the helicopter in one place.
q Make small control inputs on each of the four control sticks to slowly move the helicopter up and
down, and right and left. Use the practice suggestions in the next section on page 14 to continue
learning to y your new helicopter.
Before ying, make sure that the Li-Po battery is fully charged and that the transmitter batteries
have sufcient power remaining. One or more bars should be displayed on the Transmitter
Battery Display.
n
Flying Tips
l Make sure that the Primary Control Setting is active on the transmitter. For more information,
see page 10.
l Don't over-control. It's not necessary to move the control sticks very much to achieve the required
amount of control response from the helicopter, especially when you're just learning. Moving the
control sticks too much will make it more difcult to control the helicopter. It's better to make
small corrections of the control sticks.
l When starting, don't worry about being able to y your helicopter with a lot of skill. It will take a
little while to master if you're just beginning. With practice you will become more condent and
your ngers will begin to react spontaneously to control the helicopter the way you intend. Until
then, go slow, being careful not to y too high or too fast. The goal is always to stay in control.
l While learning, don't y too high. Use the throttle control stick to keep the helicopter about 60cm
(2ft) off the ground - no higher for now. If you feel like the helicopter is getting out of control,
simply pull the throttle control stick back to cut the power and land. You can y higher once
you've mastered basic ying at low levels.
l While learning, always try to keep yourself situated behind the helicopter, with the nose of the
helicopter pointing away from you. This will make control orientation easier.
l Always remember that you should 'y the nose' of the helicopter, not the tail. Getting used to this
concept will really help with orientation and the respective control inputs, especially right and left
aileron and rudder control inputs.
l When the helicopter's nose is pointing toward you, the aileron and rudder controls will seem
'reversed'. This takes some time to get used to until it becomes second nature. Imagining yourself
sitting in the cockpit will help you get used to this.
l Do not y less than 30cm (1ft) off the ground for prolonged periods, because the airow under
the rotating blades may cause ground effect and affect normal ying and operations.

14
n Practice Suggestions
Practice the techniques in this section to work on becoming more familiar with how the control
inputs work to make the helicopter y the way you want.
FLYING YOUR HELICOPTER
The Frog Jump
The Frog Jump is an ideal method to learn the basics of how the control inputs affect the helicopter. It
is a series of short hovers and landings that you repeat over and over, that allows you to learn the
basics without allowing the helicopter to get too far away or too out of control. It is best performed
on a laminate oor or similiar. Carpet is unsuitable.
Use the Frog Jump to:
l Learn to extend the time of hover by moving the throttle
control stick forward and backward.
l Learn to hover the helicopter while standing not only behind
the tail, but moving to the side of the helicopter, then to the
front of the helicopter.
l Learn to spin the helicopter right and left around its axis by moving the rudder control stick right
and left.
l Learn to move the helicopter forward and backward, and slide the helicopter right and left by
moving the elevator and aileron control stick forward and backward, and right and left.
Box Pattern
Use the Box Pattern technique to learn how to move the helicopter in different orientations around
you. This will help you become procient at using all the controls at the same time to move the
helicopter around.
When you move the aileron control stick right or left, the helicopter will skid to the right or left
sideways. To actually turn the helicopter around, you will need to also move the rudder control
stick right or left.
Pilot
With the nose of the helicopter pointing away from you, y the helicopter in
a box pattern. Move the helicopter forward using the elevator control stick,
slide the helicopter to the right using the aileron control stick, move the
helicopter backward, using the elevator control stick, then slide the helicopter
left, using the aileron control stick.
Pilot
Repeat the Box Pattern technique above, but this time while you're facing
the side of the helicopter. The nose of the helicopter will be toward your
left. You can then move to the other side of the helicopter to get practice
with the nose of the helicopter toward your right.
Pilot
Repeat the Box Pattern technique above, but this time with the nose of the
helicopter facing you. This is the most difcult to master, because when the
helicopter's nose is pointing toward you, the aileron and rudder controls
will seem 'reversed'. Imagining yourself sitting in the cockpit will help you
get used to this.

15
FLYING YOUR HELICOPTER
n Trimming the Controls
When you rst start ying your helicopter, each of the four Trim Displays on the LCD should be
centred, however, you may nd that your helicopter wants to move right or left, or forward or
backward at all times, even though the control sticks are centred. You can use the Trim Buttons
to adjust the controls so that the helicopter stays in place when the control sticks are centred.
To determine the amount of trim necessary, place the helicopter in a stable hover, 60cm (2ft) off the
ground, then release the control sticks for a couple of seconds. Carefully watch how the helicopter
reacts, then trim the helicopter as described below.
When trimmed properly, the helicopter should stay in position with the control sticks centred, when
placed in a stable hover.
Throttle Trim Adjustment
If the rotor blades spin without adding throttle, or if they don't spin when you add throttle, the
throttle trim needs to be adjusted.
l If the rotor blades spin without adding throttle, press the Throttle Trim
Button down (D) until the rotor blades stop spinning.
l If the rotor blades don't start to spin when you begin to add throttle,
press the Throttle Trim Button up (U) until the rotor blades start to spin
as soon as you begin to add throttle.
Rudder (Yaw) Trim Adjustment
While hovering, if the helicopter's nose tends to always want to pivot right or left, the rudder trim
needs to be adjusted.
l If the nose of the helicopter pivots toward the right, press the Rudder
Trim Button left (L) until the nose stays straight.
l If the nose of the helicopter pivots toward the left, press the Rudder
Trim Button right (R) until the nose stays straight.
Elevator (Pitch) Trim Adjustment
While hovering, if the helicopter tends to always want to move forward or backward, the elevator
trim needs to be adjusted.
l If the helicopter moves forward, press the Elevator Trim Button
down (D) until the helicopter stops moving forward.
l If the helicopter moves backward, press the Elevator Trim Button
up (U) until the helicopter stops moving backward.
Aileron (Roll) Trim Adjustment
While hovering, if the helicopter tends to always want to move to the right or left, the aileron trim
needs to be adjusted.
l If the helicopter moves toward the left, press the Aileron Trim Button
right (R) until the helicopter stops moving left.
l If the helicopter moves toward the right, press the Aileron Trim Button
left (L) until the helicopter stops moving right.
D
U
D
U
L R
L R

16
TROUBLESHOOTING GUIDE
Use this Troubleshooting Guide to help you diagnose and solve most problems that you may encounter
with the Mini-Stinger EP 2.4GHz RTF Helicopter. Most problems can be solved by following the
problem-cause-solution sections below.
If you cannot solve the problem using this Troubleshooting Guide, please contact your local
distributor, using the Customer Service Information on page 3.
1) Transmitter does not turn on
2) Motors and/or servos do not
operate
3) Red LED in helicopter blinks
continuously
4) Helicopter difcult to control
5) Li-Po battery does not charge
6) Transmitter beeps continuously
A) Transmitter batteries depleted
B) Transmitter batteries not installed
properly
C) Transmitter damaged
A) Li-Po battery depleted
B) Li-Po battery not plugged in
or plugged in backward
C) Transmitter not turned ON
D) Transmitter/receiver not paired
E) Motor(s) or main board damaged
A) Transmitter/receiver not paired
A) Advanced control setting
programmed into transmitter
B) You are ying outdoors
C) Transmitter batteries depleted
D) Li-Po battery depleted
E) Main board antennas not
positioned correctly
F) Helicopter out of trim
A) Li-Po battery plugged in backward
B) Transmitter batteries depleted
C) Transmitter batteries not installed
properly
A) Transmitter batteries depleted
A) Replace/recharge* transmitter
batteries
B) Reinstall transmitter batteries,
checking polarity (+/-)
C) Contact your local distributor
A) Charge Li-Po battery
B) Plug Li-Po battery in, observing
correct orientation
C) Turn transmitter ON
D) Pair transmitter and receiver
E) Contact your local distributor
A) Pair transmitter and receiver
A) Use Primary control setting
B) Always y indoors
C) Replace/recharge* transmitter
batteries
D) Charge Li-Po battery
E) Orientate the two antennas so
that they are 90º to each other
F) Trim helicopter for hands-off
ight
A) Plug Li-Po battery in, observing
correct orientation
B) Replace/recharge* transmitter
batteries
C) Reinstall transmitter batteries,
checking polarity (+/-)
A) Replace/recharge* transmitter
batteries
PROBLEM CAUSE SOLUTION
*Do NOT attempt to recharge the 'AA' Alkaline batteries included with your helicopter. These batteries
should be replaced when depleted. Only recharge the transmitter batteries if you are using after-market
rechargeable NiCd or NiMH batteries (available separately), as described on page 5.

17
EXPLODED VIEW ASSEMBLY DRAWING
Note that some parts that are shown separately come
preassembled from the factory into a single sub-assembly.
For a complete list of replacement parts, including photos
with cross-referenced assembly numbers, see page 18.

18
EF5682
AC Charger - USA
EF5683
Mains Charger - UK
EF5684
Mains Charger - Europe
EF5685
Aluminium Carry Case
EF5678
Rotor Blades - Top & Bottom
EF5679
Landing Skids
EF5680
Tail Boom w/Fin
EF5681
Rubber Canopy Mounts
REPLACEMENT PARTS LIST
We stock a complete set of replacement parts for your Mini-Stinger EP 2.4GHz RTF Helicopter.
Listed below are the replacement parts that are available along with their respective part numbers
for easy ordering convenience.
If your hobby retailer does not stock EF Helicopters products, contact your closest distributor for
the name of a local dealer, using the Customer Service Information on page 3.
EF5662
Transmitter - 2.4GHz
EF5663
Receiver/Servo Board
EF5664
1S 3.7V 110mAh Li-Po Battery
EF5665
Motor Set w/Pinion Gears
EF5666
Main Frame
EF5667
Under T-Shape Holder
EF5668
Swash Plate Assembly
EF5669
Main Gear Set
EF5670
Flybar w/Link
EF5671
Outer Shaft
EF5672
Inner Shaft w/Head
EF5673
Ball Linkage Rod Set
EF5674
Shaft Collar Set
EF5675
Shaft Bearing Set
EF5676
Screw Set
EF5677
Canopy w/Decals
29x1 21x2, 24x2
19x1, 26x1 12x1 15x1, 16x1, 17x1 30x1, 31x1
01x2, 02x2, 03x1, 04x1 10x1, 13x1 07x1 14x2, 27x2, 28x2
18x1, 32x1 08x2, 20x2 06x6, 11x5 33x1
05x2, 09x2 34x1, 35x2, 36x1 22x1, 23x1 25x8
Charges Two EF5664 Li-Po Batteries Charges Two EF5664 Li-Po Batteries Charges Two EF5664 Li-Po Batteries

19
Before returning your Mini-Stinger EP 2.4GHz RTF Helicopter for warranty consideration, the status
of the unit must be within the terms of the Product Warranty printed on page 2 of this Instruction
Manual. When requesting warranty service, please observe the following:
l Crash damage will not be covered under warranty. Do not request warranty service for a
crash-damaged product.
l Send your Mini-Stinger EP 2.4GHz RTF Helicopter complete with the transmitter and Li-Po
battery. Please unplug and/or remove the batteries both from the transmitter and the helicopter
before returning it. We like to have the helicopter complete so it can be thoroughly tested before
returning it to you.
l Include a note detailing the problem or service you are requesting. Service cannot be provided
without this information. Include your daytime phone number, shipping address and/or Email
address in the event we need more details pertaining to the service requested.
l If your Mini-Stinger EP 2.4GHz RTF Helicopter is out of the warranty period you may request an
estimate of services at the time you return it for service. An omission of this request implies
permission for Hobby People/Global Services to service your Mini-Stinger EP 2.4GHz RTF
Helicopter at our discretion.
l Include a method of payment for any service charges.
l Send the unit to us by United Parcel Service, Federal Express or by Insured Mail. Postage is
nonrefundable. Send your package to:
WARRANTY SERVICE INFORMATION
In Europe
Ripmax Ltd.
241 Green Street
Eneld, EN3 7SJ, U.K.
Phone: [phone]
Fax: [phone]
Website: http://www.ripmax.com
In North America
Global Services
18480 Bandilier Circle
Fountain Valley, CA 92708
Phone: [phone]
Fax: [phone]
Email: [e-mail]

20
All Contents Copyright 2009, EF Helicopters - All Rights Reserved
In North America - http://www.globalhobby.com
In Europe - http://www.ripmax.com
Revision 1, October 2009
Model Number EF008