DHK Hobby HUNTER BL 8331 Operator's manual

1/10 Scale 4WD Brushless Short Course Truck
用户使用说明书
Model : 8331
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Introduction
Thank you for choosing DHK's HUNTER BL! This evolutionary short course truck(SCT) is designed in
thorough research and assembled with utmost craftsmanship. This 1:10 sclale 4WD brushless SCT can
run as fast as 35MPH/55KPH. It is easy to drive and it uses quality parts and accessories to achieve best
performance. It will bring you a lot of joy and fun when you drive this model. Before starting to run the
model, you are kindly requested to take some time to review this instruction
manual for a better operation. This easy to follow instruction manual aims to provide a general guideline
for end-users. Kindly note that a good understanding of the model, its relevant parts together with other
accessories packed in this consumer box will enable you to have fun in driving. Meanwhile, users are
recommended to conduct regular maintenance for a smooth performance. Failure to do so might shorten
the lifespan of your model. You are cordially advised that DHK Hobby makes all necessary parts and
accessories to support you for any problem during and after your driving.
Before you operate this radio controlled model, you must understand the following:
1.Make sure that all screws and nuts are tightened securely.
2.Make sure that the batteries are fresh or fully charged so the vehicle won't lose control.
3.Do not drive the model in the following places/areas to avoid injury of people and damage to the public
property. Drive your model in open areas.
> On public streets or parks. Cause injury or death of pedestrians, young children, animals and pets.
> On highways. Cause accidents or damage of the model.
> In water. Cause damage to electronic components and parts, or direct failure of the model.
4.Check all signals and electronic parts are working properly.
After running, battery, ESC, and motor can be very hot. Make sure not to touch with bare hands.
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Warning:
This high performance model can run very fast. It is designed and produced for people of 14+ years of
age to operate. Players under that age should be guided by adult supervision. Entry level players should
seek guidance and supervision from experienced model players. Players are responsible for any/all
accidental occurrences (human or animal injury, damage to property and possessions, breakage of the
model itself) due to improper operation of this model.

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Model specifications
Overall length
Width
Height
: 572mm (22.5 in)
: 306mm (12.0 in) (Excluding body)
: 153mm (6.02 in)(Excluding body)
Specs BLHUNTER
: 330mm (13 in)
Wheelbase
Ground clearance : 30mm (1.2 in)
Weight (net) : 5.8lbs/2.60kgs(Excluding transmitter)
Front track/rear track : 258mm/258mm (10.2 in/10.2 in)
Tire diameter/width : Φ108*45mm (Φ4.3*1.8 in)
Wheel diameter/width : Φ60.5*40mm (Φ2.4*1.6 in)
Gear ratio : 13.17:1
Speed : 35MPH/56KPH
Articles required to operate the model
4 pcs AA batteries (Ni-Mh or Ni-Cd rechargeable batteries, or non-rechargeable alkaline batteries)
for 2.4GHz transmitter. Please refer to the 2.4GHz transmitter Instruction Manual.
2 Channel 2.4GHz radio system
HUNTER BL comes with a full function 2 channel 2.4GHz radio transmitter and receiver. Please refer to
the 2.4GHz User's Instructions Manual for detail.
Brushless electronic speed controller (ESC)
HUNTER BL comes with 45A brushless electronic speed controller. Please refer to the instructions
manual of the ESC for detail.
Brushless electric motor
Lipo balance charger (#P109) (for 2S/3S Lipo battery) 850mAh output with AC input
Motor 3650 KV(RPM)
Power
Empty load current
Resistance(Ω)
Length(including motor shaft)
Diameter
Weight
Shaft diameter
: 3970
: 21.0V
: 2.0A(10V)
: 11Ω
: 70mm
: 36mm
: 170g
: 3.175mm

6kgs Servo
Features : Plastic gears, ball bearings
Working voltage : 4.8-6.0V
Speed (seconds/60°C) : 0.18-0.16sec/60º
Torque : 6kg/cm
Net weight : 40g
Size(LxWxH) : 40.8x20.1x38mm
Lipo Batteries
This short course truck comes with 7.4V 2S 2300mAh Lipo battery pack. Handling Lipo batteries should
be very careful. Please read the following points with regard to charging and discharging Lipo batteries.
Charging the Lipo battery
Be sure to follow these important warnings regarding the charging of Lipo batteries.
> Never leave a Lipo battery unattended at any time while being charged.
> Never charge a Lipo battery while it's inside the model. A hot pack could ignite wood, foam, plastic, etc.
> Never charge Lipo battery with Ni-Mh or Ni-Cd peak charger. Only use a charger designed specifically
for Lipo batteries which can apply the constant current/constant voltage charge technique.
> Never charge Lipo battery at currents greater than the "1C" rating of the battery.
> Never allow Lipo cells to overheat at any time. Cells which exceed 60ºC (140°F) during charge can and
usually will become damaged physically and possibly catch fire. Always inspect a battery which has
previously overheated and do not re-use if you suspect it has been damaged in any way.
> Always discontinue charging a Lipo immediately if at any time you witness smoke or see the battery
starting to swell up. This may cause the battery to rupture and/or lead, and the reaction with air may
cause the chemicals to ignite, resulting in fire. Disconnect the battery and leave it in a safe fireproof
location for approximately 15 minutes.
> Always charge a Lipo battery in a fireproof location, which could be a container made of metal, ceramic
tile, or a bucket of sand.
> Never allow a battery's positive and negative leads to accidentally touch each other. This will result in a
short circuit and cause permanent damage to your battery and charger.
Important warnings:
> Always monitor the battery and charger during the entire charge process. Never leave the battery and
charger unattended during charge!
> Never continue to charge the Lipo batteries if the charger fails to recognize full charge. Overheating or
swelling of the Lipo cells is an indication that a problem exists and the batteries should be disconnected
from the charger immediately and placed in a fireproof location.
Discharging the Lipo battery
> Never leave a Lipo battery unattended at any time while being discharged.
> Always discharge Lipo batteries in a fireproof location, which could be a container made of metal or on
ceramic tile.
> Always connect the battery's lead marked "Discharge" or "TO ESC" to the electronic speed controller.
Never attempt to connect the battery's "CHARGE" lead to the ESC.
> It is strongly recommended to use an ESC which is designed to handle the low voltage cutoff points or
Lipo batteries (Always follow the instructions provided with the ESC for proper operation). Discharging
Lipo batteries below 2.5V per cell (Norm is 3.7V per cell, at 4.2V once fully charged) can cause
permanent damage and limit the number of times the battery can effectively be used again.
> Never discharge Lipo batteries at currents which exceed the discharge current rating of the battery as
this can often cause a cell to overheat. Do not allow a Lipo cell to exceed 60°C (140°F) during discharge.
Caution!
Cells may be hot. Do not allow the battery's internal electrolyte to get in the eyes or on skin. Wash affected
areas with soap and water immediately if they come in contact with the electrolyte. If electrolyte makes
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immediately.
Carefully inspect Lipo batteries which have been involved in a crash for even the smallest of cracks,
splits, punctures or damage to the wiring and connectors.
Disposal of Lipo batteries
Unlike Ni-Cd batteries, Lithium-polymer batteries are environmentally friendly. For safety reasons, it's best
that Lipo cells be fully discharged before disposal (however, if physically damaged it is not recommended
to discharge Lipo cells before disposal). The batteries must also be cool before proceeding with disposal
instructions. To dispose of Lipo cells and packs:
> If any Lipo cell in the pack has been physically damaged, resulting in a swollen cell or a split or tear in a
cell's foil covering, do not discharge the battery.
> Place the Lipo battery in a fireproof container or bucket of sand.
> Connect the battery to a Lipo discharger. Set the discharge cutoff voltage to the lowest possible value.
Set the discharge current to a C/10 value, with "C" being the capacity rating of the pack.
> Discharge the battery until its voltage reaches 1.0V per cell or lower. For resistive load type dischargers,
discharge the battery for up to 24 hours.
> Submerse the battery into bucket or tub of salt water. This container should have a lid, but it does not
need to be air-tight. Perhaps a bucket or tub containing 3 to 5 gallons of cold water, and mix in 1/2 cup of
salt per gallon of water. Drop the battery into the salt water. All the battery to remain in the tub of salt
water for at least 2 weeks.
> Remove the Lipo battery from the salt water and place it in the normal trash.
Terminology
Electronic speed controller (ESC)
An electronic circuit with the purpose to vary an electric motor's speed, its direction and possibly also to
act as a dynamic brake. ESCs are often used on electrically-powered radio controlled models.
An ESC can be a stand-alone unit which plugs into the receiver's throttle control channel or incorporated
into the receiver itself, as is the case in most toy-grade R/C vehicles. Some R/C manufacturers that install
proprietary hobby-grade electronics in their entry-level vehicles, vessels or aircraft use onboard electronics
that combine the two on a single circuit board.
Brushless DC motors (BLDC motors, BL motors)
Also known as (ECMs, EC motors) are synchronous electric motorselectronically commutated motors
powered by direct-current (DC) electricity and having electronic commutation systems, rather than
mechanical commutators and brushes. The current-to-torque and voltage-to-speed relationships of BLDC
motors are linear.
BLDC motors may be described as stepper motors, with fixed permanent magnets and possibly more
poles on the rotor than the stator, or reluctance motors. The latter may be without permanent magnets,
just poles that are induced on the rotor then pulled into alignment by timed stator windings. However, the
term stepper motor tends to be used for motors that are designed specifically to be operated in a mode
where they are frequently stopped with the rotor in a defined angular position.
RC servos
Servos are hobbyist remote control devices typically employed in radio-controlled models, where they are
used to provide actuation for various mechanical systems such as the steering of a car, the control surfaces
on a plane, or the rudder of a boat.
Due to their affordability, reliability, and simplicity of control by microprocessors, RC servos are often used
in small-scale robotics applications.
RC servos are composed of an electric motor mechanically linked to a potentiometer. A standard RC
receiver sends Pulse-width modulation (PWM) signals to the servo. The electronics inside the servo
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contact with the eyes, flush with large amounts of water for 15 minutes and seek medical attention