ACE RC BLC-40 Instruction manual

INTRODUCTION

FEATURES

JC 1081

Congratulations on selecting the ACE RC BLC series brush-

less motor electric speed control. The BLC-40 is designed for 

mini-size electric aircraft/helicopter, while the BLC-65 and 

BLC-75  are  designed  for  the  mid-size  electric 

aircraft/helicopter.  These  brushless  motor  speed  controls 

can satisfy all your flying needs. They are capable of supply-

ing up to 40Amps (BLC-40), 65Amps (BLC-65), and 75Amps 

(BLC-75) of continuous motor current. They are small and 

lightweight, but includes a large heat sink surface area. They 

are the most suitable ESC for the Thunder Tiger OBL series 

brushless motors. For safety considerations, there are built-

in safety features to prevent accidental motor startup when 

powering  on.  Before  using  this  speed  control,  please  read 

the manual carefully so that setup can be done properly.

Low battery voltage protection.

Overheat protection.

Motor timing adjustment.

Brake control.

Throttle response adjustment.

Airplane and helicopter modes.

Governor mode for helicopter.

Soft start.

Anti-interference ring.

SPECIFICATIONS

Product Name

Item No.

Resistance

Continuous Load (5 min)

BEC Voltage

BEC Current

Reverse

Brake

Governor Mode

Over Load Protection

Setup Procedure

Weight 

Dimensions 

BLC-40

8041-A/8041-H

7.4~14.8 V

(2S-4S Li-Po)

0.0048 

Ω

40A

5V

2A

No

Yes

Yes

Temp. Protection

Digital

27g

52x24x7.9 

BLC-65

8042-A/8042-H

7.4~37 V

(2S-10S Li-Po)

0.0044 

Ω

65A

Non

Non

No

Yes

Yes

Temp. Protection

Digital

46g

60x34.5x11.5 

BLC-75

8043-A/8043-H

7.4~22.2 V

(2S-6S Li-Po)

0.003 

Ω

75A

Non

Non

No

Yes

Yes

Temp. Protection

Digital

45.6g

50x34.5x11.5 

ACE RC BLC-40/BLC-65/BLC-75 

Brushless Motor Electric 

Speed Control

Product no. #8041 / 8042 / 8043

CONTENT

Note:

1)Ensure that all solder connections are of good quality.

2)Connect the ESC to the motor matching the 

corresponding wire colors.  If the motor rotation is the 

opposite of what is desired, then simply reverse any two 

of the wires.

3)Make sure that the battery polarity is connected  

properly.

Manufactured by

THUNDER TIGER CORP.

FUNCTIONS

There  are  5  basic  functions  included  in  the  BLC  controller 

that  have  more  options  can  be  selected  by  special  setting 

procedure.  The  following  are  the  explanation  for  these 

functions.

BATTERY PROTECTION

It was a built in Battery Management System function of the 

speed control. The power cut off timing was based on the 

cell  number  and  continues  output  current  of  the  battery. 

There  were  4  options  defined  in  the  battery  management 

system in the BLC series controllers. 3 options were for Li-

Polymer  batteries  and  1  option  for  using  with  NiCd/NiMH 

batteries.  The  battery  management  system  allows  you  to 

protect your batteries from over discharge and moreover to 

extend the lifetime of your batteries. The 4 options are listed 

as below:

. Light discharge protection for Li-Po/Li-Ion

. Standard discharge protection for Li-Po/Li-Ion

. Heavy discharge protection for Li-Po/Li-On

. +5V cut-off protection for Ni-Mh/Ni-CD

MOTOR TIMING

There  were  3  options  in  this  function  that  allows  you  to 

maximize the performance of your motor output. You could 

chose  from  low/mid/high  to  fit  with  different  brushless 

motors.  Higher  timing  offers  more  power  output  at  the 

expense  of  efficiency.  Please  check  the  current  draw  after 

changing the timing option in order to prevent overloading 

of battery. The 3 options are listed as below:

. Auto timing 

. Soft timing 

. Standard timing 

. Hard tim ing 

Brake Mode

There  were  3  options  in  brake  function  that  allows  you  to 

choose  from  no  brake,  soft  brake,  and  hard  brake  option. 

The 3 options are listed as below:

. No brake

. Soft brake

. Hard brake

Throttle Sensitivity 

The throttle sensitivity function offers you different throttle 

response time for different set up in different occasions. It 

could  be  an  ideal  function  with  different  flying  style.  The 

faster  throttle  response  time  will  offer  you  quick  and 

sensitive  throttle  feedback.  The  3  options  are  listed  as 

below:

. Soft throttle response

. Standard throttle response

. Quick throttle response

Flying Mode

The  flying  mode  offers  you  different  options  for  different 

aircrafts.  You  could  chose  from  airplane,  helicopter,  and 

helicopter with governor. The 3 options are listed as below:

. Airplane mode

. Helicopter mode with governor (see Note)

. Helicopter mode without governor (see Note)

Note:

1)For the battery protection function, technically the power 

cut off timing was based on the cell number and continues 

output  current  of  the  battery.  The  microprocessor  will 

calculate the timing and to cut the power with two steps. 

Because the late stage of each battery discharge cycle has 

quick  voltage  change,  such  function  will  provide  a  safe 

process during the operation

1st step: 

enabled when the single cell reaches the low 

point, the motor will be forced to lower the 

RPM by microprocessor

2nd step:

 enabled when the single cell reaches the 

lowest  point  defined  in  the  system,  the 

Option Mode

Auto timing

Soft timing

Standard timing

Hard timing

No brake

Soft brake

Hard brake

Soft throttle response

Standard throttle response

Quick throttle response

Airplane mode

+5V cut-off protection for 

Ni-Mh/Ni-CD

Heavy discharge protection 

for Li-Po/Li-On

Standard discharge 

protection for Li-Po/Li-Ion

Light discharge protec-

tion for Li-Po/Li-Ion

Helicopter mode 

without governor

Helicopter mode 

without governor

Flying 

Mode

Throttle 

Sensitivity

Brake 

Mode

Motor 

Timing

Battery   

Protection

Function

Correlation combina-

tions of sounds

SERVICE

Thank  you  for  purchasing  the  BLC  series  brushless  motor 

ESC. Thunder Tiger strives to bring you the highest level of 

quality  and  service  we  can  provide.  We  race  and  test  our 

products  around  the  world  to  bring  you  state-of-the-art 

items.  Thunder  Tiger  guarantees  that  you  should  enjoy 

many  hours  of  trouble  free  use  from  our  R/C  products. 

Thunder Tiger products have been sold worldwide through 

the authorized distributors that are supported directly and 

rapidly from Thunder Tiger. You may find that Thunder Tiger 

is  always  pursuing  to  explore  new  items  creatively  with 

highest quality. To update the latest product information and 

to get the best technical support, please feel free to contact 

your local hobby shops or Thunder Tiger authorized distribu-

tor.

START PROCEDURE

1.Turn on your transmitter and make sure that the throttle 

stick is at the idle position.

2.Turn on the receiver if no BEC.

3.Connect the battery to the ESC.

4.If the ESC is connected correctly and receives signals 

from the receiver, you will hear 3 rising tones (      ), 

which means the ESC is ready to go.

5.Go flying and have fun, but be mindful of your flying 

time.

CAUTION!!

High power motor systems could be very dangerous. High 

current could generate heat on wires, batteries, and 

motors. Always follow the instruction and use proper tools 

to set up the system within safe range. Always fly at a 

designed field with caution even though this controller is 

equipped with safety arming program.

Speed Control x 1 

Gold Connectors x 2 sets 

(for battery connecting)

Anti-interference ring x1

Instruction Manual x 1 

Application

Item No

Function 

Mode 

Airplane

8041-A

8042-A

8043-A

Helicopter

8041-H

8042-H

8043-H

FACTORY DEFAULT SETTING

Due to the normal flying mode setting on the speed control 

is different from airplane and helicopter. So for each BLC 

series, there are 2 type can be chosen to match your flying 

requirement. Both of these 2 type have the same specifica-

tion and full function. Just the factory default setting mode 

are  different.  The  following  table  is  the  factory  default 

setting mode for these 2 types of airplane and helicopter 

function.

BLC-40

BLC-65

BLC-75

Helicopter mode 

without governor

Standard throttle 

response

No brake

Auto timing

Standard discharge 

protection for 

Li-Po/Li-Ion

Airplane mode

+5V cut-off 

protection for 

Ni-Mh/Ni-CD

Auto timing

No brake

Quick throttle 

response

Battery 

Protection

Motor 

Timing

Brake Mode

Throttle 

Sensitivity

Flying Mode

CONNECTIONS

It  is  strongly  recommended  to  use  3.5mm  or  4.0mm  gold 

connectors,  which  should  be  soldered  firmly  to  the  cables.  

Please refer to the diagram below on how to connect the ESC 

with battery and motor.

Black(-)

Red(+)

Receiver

Black

(-)

to Motor

Not included

Gold Connector

(+)

Red

Yellow

Battery

OPTIONAL PARTS

AQ0835

Anti-interference ring(3)

AQ0836

Gold Connectors(3.5mm) 

AQ0837

Gold Connectors(4mm) 

1

st

 step voltage

3.2V

2.9V

2.6V

2

nd

 step voltage

2.9V

2.6V

2.3V

Protection Function Mode

Light  discharge  protection 

for Li-Po/Li-Ion

Standard  discharge  protec-

tion for Li-Po/Li-Ion

Heavy  discharge  protection 

for Li-Po/Li-On

+5V  cut-off  protection  for 

Ni-Mh/Ni-CD

No battery voltage 

protection defined

2)Helicopter modes are equipped with a soft start function. 

However, the ESC will not activate the soft start function in 

the  first  5  seconds  after  the  throttle  is  shut  down.  This 

way, if the user shuts down the throttle by mistake during 

flight, it will allow the motor restart immediately and avoid 

a crash.

SETTING PROCEDURE

The  following  processes  will  explain  the  throttle  calibration 

and the setting of ESC.

1.As a safety precaution, we recommend disengaging the 

pinion gear from the main gear during this procedure.

2.Also review the FUNCTION MODE CHART and select which 

modes you wish to use since the setting procedure immedi

ately follows the calibration procedure.

3.Turn on the transmitter and put the throttle stick at full 

throttle position.

4.Turn on the receiver if no BEC.

5.Connect the battery and the ESC.

6.You will hear 6 tones (                 ) from the ESC, which 

means the full throttle position has been calibrated.

7.Move the throttle stick to the idle position (lowest 

position). You will hear 4 tones (                  ), which 

means  the  idle  throttle  position  has  been  calibrated  and 

now the ESC will enter the setting mode.

8.While in the setting mode you will hear combinations of 

sounds,  which  represent  various  functions.  Each  sound 

consists  of  a  long  tone  and  a  short  tone.  The  long  tone 

represents which function is being set, and the short tone 

represents  the  option  mode  for  that  particular  function. 

You  can  check  the  FUNCTION  MODE  CHART  to  get  the 

correlation  for  the  difference  function  mode  and  the 

combination sounds. 

9.Shortly after the idle position has been calibrated you will 

start to hear these setting tones. If you wish to select the 

setting  of  the  mode  then  move  the  throttle  stick  to  full 

throttle position and wait for the confirmation sound 

(                  )means this mode you select has already been 

set.  After  that,  move  the  stick  to  the  idle  position  and 

waiting for the next function mode setting. If you do not 

wish to select this setting, leave the throttle stick in the 

idle position and wait for the subsequent setting mode.

10.The setting sequence for these 5 main functions will be 

–(1) Battery Protection (2) Motor Timing (3) Brake Mode 

(4) Throttle Sensitivity (5) Flying Mode.

11.After setting is complete, please turn the power off by 

disconnecting the battery from the ESC. If you only change 

certain  functions,  the  others  will  remain  the  factory 

setting.

motor  will  be  completely  cut  off.  To  regain 

the  power,  the  user  needs  to  adjust  the 

throttle stick to the “stop” position until the 

battery  voltage  comes  back  to  the  safe 

level.

The following were the detailed definition of 

each  option  mode  in  battery  protection 

function.

FUNCTION MODE CHART

http://www.thundertiger.com

Voltage range