Instruction Manual
Specifications:
Main Rotor Diameter A: 340mm Drive System: 2x 130PH All-up Weight: 188g (Battery included)
Main Rotor Diameter B: 340mm Transmitter: WK-0408 Battery: 3.7V 1000mAh Li-Po
Overall Length: 425mm Receiver: RX-410 (4-in-1 receiver) Gyro: Built-in
Servos: weight 8.5g / speed 0.11sec/60° (4.8V) / torque 0.9kg/cm (4.8V) / dimension 22.5mm x 11.5mm x 24mm
Model Features:
1. One cell Li-Po @ 3.7V 1000mAH gives 7 to 10 minute flight when fully charged.
2. High quality servos are fat and precise for total control when flying.
3. Coaxial driveshafts system provides easy and stable flying characteristics.
4. 4-channel transmitter with illuminated power indicator makes for problem-free flying.
5. This model is ideal for the beginner as it is very stable and easy to control.
Australian agent:
2
Contents
Introduction ------------------------------------------------------------------------------ 3
Warnings --------------------------------------------------------------------------------- 3
Cautions---------------------------------------------------------------------------------- 4
Charging batteries ----------------------------------------------------------------------5
Transmitter Features ------------------------------------------------------------------ 6
Receiver Identification------------------------------------------------------------------ 7
Battery Mounting and Adjustment ------------------------------------------------- 7
Swashplate Adjustment -------------------------------------------------------------- 8
Main Rotor Blade Adjustment ------------------------------------------------------ 8
Flying the HM 5G4 -------------------------------------------------------------- 8 – 11
3
Introduction
Thank you for purchasing our product. We strongly recommend that you read the whole user manual before you
fly your helicopter. This will make it easier and safer as you will be given a full explanation of how the helicopter
works, and how to use the control transmitter.
Keep the manual as a future reference book for maintenance and adjustment.
Also be aware that this model helicopter is meant for indoor use under draught-free conditions.
Outdoor use is not recommended, but if done, only fly when there is ABSOLUTELY NO WIND.
Warning
1. The HM 5G4 helicopter is not a toy, and it is designed for indoor use.
With its complex combinations of electronics, mechanics, and aerodynamics it requires proper setup and
adjustment to be used to it full potential, and to avoid accidents. Although it is adjusted from the factory you
should always check it as outlined in this Instruction Manual.
We accept no liability for damage and consequent damage arising from the use of the products, because we
have no control over the way they are installed, used, and operated.
If you fly in a room containing valuables, be aware that if you don’t possess the required flying skills and
control of the helicopter, you can create a lot of damage!
2. Before you charge the Li-Po battery, please read the instructions on page 5.
Use only the supplied charger unless you have other dedicated Li-Po charger, and know how to use it. Do not
overcharge. Overcharging may result in fire or explosion. If the battery gets hot during charging, STOP
CHARGING AT ONCE. NEVER short circuit the battery! It packs a lot of energy and may explode or ignite.
The battery must be properly disposed of.
3. Children under 14 years old must only fly the helicopter under a competent adult pilot’s supervision.
Notice: Please let the motors cool for 10 minutes after each flight of a fully charged battery pack. That will
allow the motors to cool down as they otherwise risk overheating, and start burning or be damaged.
Please READ THIS BEFORE CHARGING THE Li-Po Battery:
ALWAYS use the supplied approved Li-Po charger, or a Li-Po approved charger.
NEVER charge over 4.25V per cell
NEVER charge at currents greater than 1C (C = battery capacity in Ah or mAh)
NEVER trickle charge
NEVER charge dissimilar or unmatched packs in series or with any difference in cell type, cell capacity, pack
capacity or charge state (±0.03V per cell). If in doubt, charge cells separately.
NEVER allow to Discharge below 3.0V per cell
NEVER expose pack to intense heat or prolonged exposure to elevated temperature
NEVER continue charging if any part of pack gets warm (Li-Po packs should not heat up during charging)
NEVER charge a pack at sub-zero temperatures
NEVER disassemble or modify pack wiring in any way, or puncture cells
NEVER place on combustible materials or leave unattended during charging
NEVER charge a pack that is under voltage after recovery (under 3.0V per cell)
ALWAYS charge in a fireproof location
ALWAYS set charger's output voltage to match battery voltage if using other than supplied charger
4
Cautions
1. This helicopter is operated by radio control, so it is important that you are always using fresh and / or
fully charged batteries. Never allow the batteries to run low as that may cause you to lose control of the
helicopter.
2. Always turn on the transmitter before plugging in the flight battery, and always unplug the flight
battery before turning off the transmitter. When flying the helicopter, please make sure that the
transmitter antenna is completely extended and is pointed up toward the sky, not down toward the
ground.
3. You should perform a range check of your radio equipment before each day of flying, or before to the
first flight of a new or repaired model. The range check can be done by not extending the antenna and
move about 30 paces away from the model. Then check that all the controls work properly by moving the
sticks on the transmitter,
DON’T FLY the helicopter with the antenna not extended, just see that there is no jittering or interrupted
movements when the sticks are moved, or that the servos are buzzing.
4. Do not allow any of the electrical components to get wet as this will cause damage to them, and create
erratic responses from the components, which in turn may cause damage to helicopter and/or
surroundings.
If the helicopter gets dirty, don't use any solvents to clean it. Solvents will damage the plastic and
composite parts.
Never shorten the receiver antenna as that may disrupt the radio signals, and you could lose control of
the helicopter.
A. PRE-FLIGHT PREPARATION CHECK LIST:
Note: This list is not a substitute for reading the instruction manual, which is highly
recommended for even experienced pilots. Detailed flying instructions start on page 8.
1. Inspect contents
2. Charge the on-board flight battery (See page 5)
3. Install 8 “AA” new Alkaline or fully charged re-chargeable batteries in the transmitter
4. Check the center of gravity of the helicopter (See page 7)
5. Test the controls
6. Familiarize yourself with the controls
7. Find a suitable area for flying as suggested above
B: FLYING CHECK LIST
Note: This list is not a substitute for reading the instruction manual, which is highly
recommended for even experienced pilots.
1. Always turn the transmitter on first
2. Plug the on-board battery into the 4-in-1 control unit
3. Allow the 4-in-1 control unit to arm properly (see Instruction Manual)
4. Fly the model
5. Land the model
6. Unplug the flight battery from the 4-in-1 control unit
7. Always turn the transmitter off last
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1. Charging On-board Li-Po Batteries:
Use the supplied battery charger for the on-
board Li-Po battery in the helicopter. This
charger will automatically give the correct
charge.
Plug the charger to the battery before plugging
the charger into power point if the power point
is not switched off.
At the start of the charge the diode on the
charger will glow bright RED. After a little over
one hour this light will change to GREEN,
indicating that the battery is fully charged.
Never leave the battery charging unattended.
Never leave the fully charged battery on the
charger.
Since the battery is single cell, the risk of
voltage imbalance between cells as can occur
in multi-cell Li-Po batteries is not an issue.
Make sure the charger plug is mounted the
correct way. The plug should go in without any
significant resistance when it is the correct way.
Fig. C
2. Transmitter Batteries:
The transmitter takes 8 AA cells (not supplied).
It is recommended to use either Alkaline cells,
or rechargeable Ni-Cad or NiMH cells.
Use only new alkaline, or fully charged re-
chargeable batteries.
When inserting the battery holder into the
transmitter, make sure that the lugs (see Fig.C)
are pointed upwards as shown in the picture.
The charge plug on the transmitter must only be
used with rechargeable batteries. If used, make
sure that the polarity on the charger is correct.
With fully charged cells all the fields on the
power indicator on the front of the transmitter
should light up when you switch it on. If not,
then check the voltage of the batteries, and that
they all have proper contact.
6
Transmitter Features
4-Channe l Tra nsmit ter F eatur es:
1. The tr ansmitter has p ower indicator,
ergonometric desig n, and D IP switche s ava ilable
for s ervo rever sing.
2. 4-c hanne l m icro-computer e ncode r; PPM
modulation; outp ut po wer 2 00mW; current
drain: 1 50 mA;
3. Pow er so urce: 8 x 1.2V Ni- Cd battery (9 .6V
600mA h) or 8 x 1.5VAAdry c ell batt ery.
Controls Identific ation and Funct ion ( Fig. 1/Fig.
2):
MOD E I
1. Le ft s tick: E le vator / Rudd er . Co nt ro ls you r
he licop te r fo rw ar d, b ac kward, l eft, a nd r ig ht . Pu sh up
to f ly your h el icopt er forward , pull d ow n to f ly
backwar d, push l eft t o f ly l ef t, a nd pu sh r ight t o fly
right .
2. Rig ht st ick: T hrottle / Ai le ron. C on trols yo ur
he licop te r as ce nd ing, d escendi ng , moving left a nd
right . Push u p for y our h el ic op te r t o a scend; pull
down t o de sc en d, push left to mo ve y ou r heli co pter
left, an d pu sh ri ght t o move ri gh t.
MOD E I I
1. L ef t st ic k: T hr ot tle / Rudd er . Cont ro ls you r
he licop te r as ce nd ing, d escendi ng , moving left a nd
right . Push u p for y our h el ic op te r t o a scend, pull d ow n
to d es cend, p us h le ft to fly le ft , an d pu sh ri gh t to fly
right .
2. Rig ht sti ck Elevato r / R ud der. C ontrols yo ur
he licop te r fo rw ar d, b ac kward, l eft mo ving a nd right
mo vin g. Pu sh u p t o f ly your h el ic opter fo rw ard , p ull
down t o fly backwa rd , push le ft t o m ove yo ur
he licop te r le ft , an d p ush r ig ht to m ov e righ t.
3. Power in di cator . The i nd icato r h as t hree d if feren t
color s: red, y el lo w, a nd green . Gree n LED o n mean s
there is en ough p ower t o fly; - gree n LED o ff and
ye llo w LED o n indica te there is not e no ug h powe r le ft ,
so l an d an d s top fl ying; - ye llow L ED off a nd red L ED
on show the p ow er is v er y lo w, so l an d imme di ately.
4. Elevator tri m. It c ontro ls and mo difie s your
he licop te r fo rw ar d an d ba ck wa rd. Pu sh u p t o fl y
forwa rd , an d p ul l do wn to f ly backwar d.
5. Rudd er trim. Th e tr im co ntro ls a nd mod if ie s yo ur
he licop te r bi as to left a nd r ig ht . M ov e the t rim l ef t to fl y
leftwar d, and m ov e righ t to f ly ri ghtwa rd
6. Thro tt le tri m. The t hr ot tl e t ri m cont ro ls you r
he licop te r’ s b ia s in as ce nd a nd de scend . Push up the tr im
to a sc en d, a nd pull d own to de scend .
7. Ailer on trim. T he ailer on tr im con tr ol s your he licop te r
bias t o le ft or r ig ht . Pu sh the tr im left t o fl y le ft , a nd p us h
the t ri m r igh t to fl y righ t.
8. Po wer s wi tc h. T ur ns on o r off t he t ra ns mitte r p owe r.
Press th e swit ch up t o turn o n the p ower, a nd press d ow n
to t ur n of f.
9. An tenna . Transm it the s ig na ls.
10. Char ge jack. Ch ar ge t he battery pa ck w it h curr en t
50 mA a nd volta ge not mo re than 1 2V.
USE ONLY WI TH R EC HA RGEAB LE BA TTERIES !
11. Batt er y bo x. Please n ote th e pola ri ties while
inser ti ng t he ba tteries .
Mode 1
Fig.1
Fig.2
Fig.3 Dip switches
7
DIP Switches Identification (Fig. 3):
1. Elevator. Reverse the elevator servo direction.
2. Aileron. Reverse the aileron servo direction.
3. Throttle. Reverse the throttle stick direction.
Note: Make sure that the throttle stick works correctly
before flight,
4. Rudder. Reverse the rudder stick direction.
7. Simulator. Simulator signal switch.
Receiver Identification
1. Gyro sensitivity adjustment (SENSITIVE).
Adjust the sensitivity according to the flight
performance. Clockwise adjustment increases the
sensitivity and counterclockwise adjustment decreases
the sensitivity.
2. LED. LED indicates the receiving status. Quick flash
means the signal is being received; LED on means the
signal has been received; slow flash means the signal
fails to be received.
3. Servo extent adjustment (EXTENT). EXTENT knob
is used to set up the servo travel. Clockwise adjustment
increases the servo travel, and counterclockwise
adjustment decreases the servo travel.
4. Ma in motor. Connec t t o t he ma in motor.
5. Tail motor. C onnec t to the tail mo tor.
6. Aileron servo. Connect to the aileron servo.
7. Elevator servo. Connect to the elevator servo.
8. Power cable. Connect to the battery.
Battery Mountingand
Adjustments
1. Battery pack mounting. Place the battery pack in
the correct position of your helicopter (Fig. 5).
2. CG balance. Put your helicopter in a horizontal
position and have the flybar vertical to the tail truss of
your helicopter.
Lift your helicopter using your index fingers to support
the two sides of flybar, and check the balance. The tail
truss should be level with the ground. If it is not,
move the battery pack backwards or forwards to
balance.
Always check the Center of Gravity (CG) with the battery
pack and canopy installed (Fig. 6).
The Factory Default Settings:
CHANNEL ON/OFF
1
OFF
2
ON
3
OFF
4
ON
5 NOT USED
6
NOT USED
7
OFF
8 NOT USED
Fig.4
Fig.5
Fig.6
8
Swashplate Adjustment
1. Swashplate inspection. Pull down the throttle
stick and throttle trim to the lowest position, and put
the elevator trim and aileron trim in the neutral
position, - centred (Fig. 1).
Then turn on the transmitter and then connect the
helicopter power cable. Check whether or not the
swashplate is in a horizontal level after the reposition of
elevator and aileron servos.
2. Swashplate adjustment. If the swashplate is
not horizontal, you can adjust through the following
two steps: (1) elevator and aileron adjustment.
Reconnect to the battery pack and await the
reposition of elevator and aileron, adjust the servo
bellcrank to horizontal level.
(2) servo linkage rod adjustment. Adjust the length of
servo linkage rod and make the swashplate
horizontal (Fig. 7).
Main Rotor Blade
Adjustment
1. Main rotor blade inspection.
(1) check that the fixing screws of main rotor blade are not
too loose or tight (Blades move freely without slop).
(2) check the tracking.
2. Main rotor blade adjustment.
(1) If the fixing screws are too loose, tighten till they are
firm; if too tight, unscrew till correct (See 1. above).
(2)If there is a tracking problem, lengthen or shorten the
steering linkage 1 (Fig. 8).
Fig.7
Fig. 8
Flybar Weights Assembly
If you need to reassemble (or remove) the flybar weights,
please observe the following:
1. Align the flybar block as shown in Fig. 4-1.
2. Slide the plastic block sleeve over the hook at the end of
the flybar through the opening 1 shown in Fig. 4-1 till the
hook is on the outside of the sleeve as shown in Fig 4-2 .
3. Line up the notch and the lug (Fig.4-4), and slide the
plastic sleeve over the block so the block is completely
inside the sleeve.
4. Twist the sleeve with the block inside 900counter-clockwise relative to the opening the end hook was inserted in,
and gently position the hook in that slot (see Fig. 4-3).
5. Make sure that the sleeve and the block are in the correct
position because if they come off during flight the speed and
the weight of the block can cause injury.
6. To remove the weights just follow the procedure in
reverse order.
Fig. 4-4
9
Flying HM 5G4
If you are new to flying model helicopters, please read and follow these instructions:
First make sure that all your batteries are fully charged, and that there is nothing around you that may create
interference for the receiver. Check that the helicopter is balanced by putting a finger on each end of the flybar at
equal distance from the centre of the rotor and see that fuselage is level, and not tilting in any direction. If it does,
then adjust it as explained in Battery Mountings and Adjustments, page 7.
Also make sure that you have ample space around and above the helicopter so you don’t risk hitting furniture,
appliances, chandeliers, ceiling, or other obstacles.
• Place the MH 5G4 on a flat, horizontal surface, preferably at floor level.
• Move the throttle stick slowly upwards, increasing the speed of the main rotor blades until the model begins to
lift off. Do not raise the throttle stick too quickly as the model could climb too fast causing you to lose
control or make contact with objects above like ceiling or lamps.
• Let the model lift just a few inches off the ground, and concentrate on finding a throttle stick position where the
model is in a steady hover. Sometimes it may be best to make a few short “bunny hops” just a few inches up till
you are familiar with the control inputs and trim settings needed for a steady hover. You will find the MH 5G4
needs small throttle adjustments to maintain hover. Remember to keep the throttle adjustments as fine as
possible as large throttle movements could result in uncontrolled flight and/or a possible crash.
• While doing a low-level hover, check to see if any trim is required to stop the MH 5G4 drifting in any direction. If
you find the helicopter drifts without any directional control input, make adjustments with the trim levers. If you
are not comfortable with doing this in flight, make sure you know the drift direction, land the helicopter and make
minute trim adjustments before you try again.
- If the nose of the helicopter is drifting to the left or right, you will need to adjust the rudder trim.
- If the helicopter is drifting forward or backward, you will need to adjust the elevator trim.
- If the helicopter is drifting to the left or right, you will need to adjust the aileron trim.
Keep doing this till you are happy with the way your MH 5G4 hovers at a low altitude with no or very little drifting,
and without any directional control input.
If the MH 5G4 is your first helicopter model, it will be an advantage to have an experienced helicopter pilot to trim
the model for you before making your first flight.
• When the MH 5G4 is properly trimmed, and can maintains a stable low-level hover, start practice using the
rudder, elevator and aileron controls to get the feel of how the helicopter responds to different control inputs.
Remember to keep the control inputs small and gentle to prevent jerking the helicopter around, especially when
in when you have it in a hover.
• As you become comfortable with hovering the MH 5G4 at low-levels just a few inches off the ground,
try hovering and flying the helicopter at altitudes of three to four feet. At these higher altitudes you will get a feel
for the flight characteristics of the MH 5G4 when it is flying out of “ground effect.”
• If at any time during flight you feel like the helicopter is drifting out of control, simply release all of the controls
except for throttle. You will need to use the throttle to maintain altitude, but due to the inherent stability of the
coaxial counter-rotating blades, the MH 5G4 will simply return to a stable hover on its own if space allows.
• If you are about to hit a wall or an obstacle, don’t be afraid to set the helicopter down on the ground quickly by
lowering the throttle to prevent main rotor blade strikes. There is optional training landing gear available for this
type of helicopters from any good hobby shop.
• NOTE: When flying the MH 5G4, be aware of the power level of the Li-Po battery pack.
If at any time the helicopter requires more throttle to maintain hover or flight, or cannot maintain hover
or fly, you must land the helicopter and shut the motors down IMMEDIATELY to prevent excessive drain
of the Li-Po battery pack.
If you continue to run the motors after noticing a loss in power it is possible to discharge the Li-Po
battery pack too much, and cause permanent damage to the pack. Too much discharge of the Li-Po
battery pack can result in shortened flight times, loss of power output, or total failure of the pack.
• Once you have gained experience and confidence in hovering and basic flying of the MH 5G4, you can try
more advanced manoeuvers like:
Forward/ Backward Flight - Pirouettes - Sliding Take Offs - Sliding Landings - Precision Landings
And Have Fun!
10
Flying the MH 5G4 in Mode 1
For Mode 2 the elevator and the throttle are on opposite side of Mode 1.
The trims are also changed over accordingly. See next page >
11
Flying the MH 5G4 in Mode 2
12
NOTICE: The specifications of this R/C helicopter may change without prior notice.
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