ROBOCONN GoBoard B2 User manual

GoBoard B2 User Manual
www.roboconn.org
Contains confidential and proprietary information which may not be copied, disclosed or
used by others except as expressly authorized in writing by ROBOCONN.
1
ROBOCONN
NUM:889200001
User Manual
for
GoBoard B2
Version 0.2
February 15, 2020
To download GoBoard B2 Mobile Application, search “Roboconn” on app store.

GoBoard B2 User Manual
www.roboconn.org
Contains confidential and proprietary information which may not be copied, disclosed or
used by others except as expressly authorized in writing by ROBOCONN.
2
Table of Contents
1. DOCUMENT OVERVIEW ..........................................................................................................8
1.1 DOCUMENT INTEND ................................................................................................................8
1.2 REVISION HISTORY .................................................................................................................8
2. INTRODUCTION TO GOBOARD B2 ........................................................................................9
2.1 FEATURES OF GO BOARD B2 ..................................................................................................9
3. HIGH LEVEL DEVICE OPERATION ......................................................................................10
3.1 REMOTE CONTROL MODE.....................................................................................................10
3.2 BALANCE CONTROL MODE...................................................................................................10
3.2.1 Getting on Skateboard in Balance Mode......................................................................10
4. SKATEBOARD ..........................................................................................................................11
4.1 BATTERY CASING..................................................................................................................11
4.2 MOTHER BOARD CASING......................................................................................................11
4.3 MOTORS ...............................................................................................................................11
4.4 WEIGHT SENSORS .................................................................................................................11
4.5 TURNING SCREW ..................................................................................................................11
4.6 POWER BUTTON....................................................................................................................12
4.6.1 Head Light....................................................................................................................12
4.6.2 Balance Control Mode .................................................................................................12
4.6.3 Disable Auto Weight Sensor Calibration......................................................................12
4.6.4 Motor Self-Run Test.....................................................................................................12
4.6.5 Radio Pairing Mode .....................................................................................................12
4.6.6 Remote Throttle Stick Calibration ...............................................................................12
4.6.7 Hard Shut Down...........................................................................................................12

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4.7 CHARGING PORT...................................................................................................................13
5. REMOTE ....................................................................................................................................13
5.1 THROTTLE KNOB ..................................................................................................................13
5.1.1 Skateboard Zero Speed Locking ..................................................................................13
5.2 PAIRING SWITCH ..................................................................................................................13
5.3 SHIFT SWITCH.......................................................................................................................13
5.3.1 Skateboard Heading .....................................................................................................14
5.3.2 Cruise Mode .................................................................................................................14
5.3.3 Head Light Control ......................................................................................................14
5.4 POWER SWITCH ....................................................................................................................14
5.4.1 Speed Levels ................................................................................................................14
5.4.2 Brake Levels.................................................................................................................14
5.5 SKATEBOARD BATTERY LEDS..............................................................................................14
5.6 CONNECTION LED ...............................................................................................................14
5.7 CHARGING PORT...................................................................................................................15
5.8 REMOTE BATTERY LED........................................................................................................15
6. MOBILE APPLICATION ...........................................................................................................15
6.1 APP BLUETOOTH SEARCH PAGE ...........................................................................................15
6.2 APP SPEEDOMETER PAGE .....................................................................................................16
6.3 APP DASHBOARD PAGE ........................................................................................................16
6.4 APP SETTINGS PAGE .............................................................................................................17
6.5 APP BALANCE CONTROL PAGE .............................................................................................17
6.5.1 Get on Braking Tab ......................................................................................................17
6.6 APP CALIBRATION SUB-PAGE (BALANCE CONTROL MODE).................................................18

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6.6.1 Weight Sensors Calibration Theory..............................................................................18
6.6.2 Enable Zero Calibration Tab ........................................................................................18
6.6.3 Zero Calibration at Every Power on Tab......................................................................18
6.6.4 Advanced Calibration Tab............................................................................................18
6.7 APP MODE CONTROL SUB-PAGE (BALANCE CONTROL MODE)............................................19
6.7.1 Beginner Mode Tab ......................................................................................................19
6.7.2 Advanced Mode Tab ....................................................................................................19
6.7.3 Custom Mode Tab ........................................................................................................19
6.8 MAXIMUM SPEED CONTROL SUB-PAGE (BALANCE CONTROL MODE).................................20
6.9 APP REMOTE CONTROL FEATURES PAGE ..............................................................................20
6.9.1 De-acceleration Factor .................................................................................................20
6.9.2 Race and Brake Factors................................................................................................20
6.10 APP LOCK/UNLOCK PAGE.....................................................................................................21
6.11 APP LIGHT CONTROL PAGE ..................................................................................................21
6.12 APP POWER CONTROL PAGE.................................................................................................22
6.13 APP DEVICE INFORMATION PAGE .........................................................................................22
6.14 APP FIRMWARE PAGE ...........................................................................................................23
6.14.1 Firmware Downloading Process ..................................................................................23
6.15 APP BLUETOOTH NAME CHANGE PAGE ................................................................................24
7. GO BOARD B2 SAFETY BLOCK............................................................................................25
7.1 WARNING CODES .................................................................................................................25
7.1.1 WARNING_CODE_DEVICE_IS_NOT_ACTIVATED..............................................25
7.1.2 WARNING_CODE_REMOTE_DEACCELERATING ..............................................25
7.1.3 WARNING_CODE_HIGH_STALL_CURRENT .......................................................25

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7.1.4 WARNING_CODE_REMOTE_SIGNAL_LOST .......................................................25
7.1.5 WARNING_CODE_MOSFET_OVERHEAT .............................................................25
7.1.6 WARNING_CODE_BATTERY_TILT_BACK ...........................................................25
7.1.7 WARNING_CODE_TEMPERATURE .......................................................................25
7.1.8 WARNING_CODE_CURRENT .................................................................................26
7.1.9 WARNING_CODE_SPEED_TILT_BACK ................................................................26
7.1.10 WARNING_CODE_LOW_BATTERY .......................................................................26
7.1.11 WARNING_CODE_GET_ON_WEIGHT_IS_OUT_OF_RANGE ............................26
7.1.12 WARNING_REMOTE_THROTTL_STICK_OUT_OF_RANGE..............................26
7.2 ERROR CODES ......................................................................................................................26
7.3 SAFETY SHUTDOWN..............................................................................................................26
7.3.1 LONG_POWER_BUTTON_PRESS_SHUTDOWN ..................................................27
7.3.2 BATTERY_STEEP_FALL_VOLTAGE_SHUTDOWN .............................................27
7.3.3 BATTERY_SAFTEY_UNDER_VOLTAGE_LEVEL_A_SHUTDOWN...................27
7.3.4 BATTERY_SAFTEY_UNDER_VOLTAGE_LEVEL_B_SHUTDOWN...................27
7.3.5 BATTERY_SAFTEY_OVER_VOLTAGE_LEVEL_A_SHUTDOWN .....................27
7.3.6 BATTERY_SAFTEY_OVER_VOLTAGE_LEVEL_B_SHUTDOWN......................27
7.3.7 FIRMWARE_INVALID_SHUTDOWN......................................................................27
7.3.8 INVALID_BATTERY_SHUTDOWN .........................................................................27
7.3.9 IDLE_MODE_SHUTDOWN ......................................................................................27
8. PRECAUTIONS .........................................................................................................................27

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List of Figures
Figure 1 - Skateboard Front View Figure 2 - Skateboard Side View................9
Figure 3 - Remote Back View Figure 4 - Remote Side View .........................................9
Figure 5 - Skateboard Labeled Diagram................................................................................................................11
Figure 6 - Remote Labeled Diagram ......................................................................................................................13
Figure 7 – App Bluetooth Page ...............................................................................................................................15
Figure 8 – App Speedometer Page ..........................................................................................................................16
Figure 9 – App Dashboard Page .............................................................................................................................16
Figure 10 – App Settings Page ................................................................................................................................17
Figure 11 – App Balance Control Page ..................................................................................................................17
Figure 12 – App Calibration Sub-Page ..................................................................................................................18
Figure 13 – App Mode Control Sub-Page ..............................................................................................................19
Figure 14 – App Maximum Speed Control Sub-Page ...........................................................................................20
Figure 15 – App Remote Control Features Sub-Page ...........................................................................................20
Figure 16 – App Lock/Unlock Page ........................................................................................................................21
Figure 17– App Light Control Page........................................................................................................................21
Figure 18 – App Power Control Page .....................................................................................................................22
Figure 19 – App Device Information Page .............................................................................................................22
Figure 20 – App Firmware Page .............................................................................................................................23
Figure 21 – App Bluetooth Name Change Page ....................................................................................................24

GoBoard B2 User Manual
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used by others except as expressly authorized in writing by ROBOCONN.
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List of Tables
Table 1 - Revision History ........................................................................................................................................8

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1. Document Overview
This document contains introduction to GoBoard B2, its features, construction and working to the end user.
1.1 Document Intend
It is the intent of this document to capture the information needed to provide a high level understanding to a freshman to
get familiar with GoBoard B2 which is a product by ROBOCNN.
This document SHALL be a “living” document. As the system progresses through its development phases much of the
included information will be found to be incorrect, unclear, or unnecessary. In addition items will be missed. In all of
these cases, it is important that this document be updated to best reflect the true.
1.2 Revision History
The following table provides the revision history of this document.
Table 1 - Revision History
Revison
Primary Author
Date
Purpose
0.1
Roboconn Team
12 October, 2019
Initial Document Creation
0.2
Roboconn Team
15 February, 2020
Software updates to v0.0.1.7

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2. Introduction to GoBoard B2
GoBoard B2 is the boosted version of electric skateboard developed by ROBOCONN. GoBoard is the brand name of
electric skateboard and B stands for boosted version.
The GoBoard B2 consists of a skateboard, a remote, a charger and mobile application.
Figure 1 - Skateboard Front View Figure 2 - Skateboard Side View
Figure 3 - Remote Back View Figure 4 - Remote Side View
2.1 Features of Go Board B2
The GoBoard B2 is the fully electric skateboard with amazing feature as listed below.
Dual Motors
Power thrust of 600 watts
38 Km/hr Max Speed
20 Km Mileage
6 Ah powerful LiIon battery
Smart App Connectivity
Head Light Tail Light (Custom Addition)
970mm long
9kg weight
ip64 waterproof
Remote Control and Body Control
2A Charger
Climb up the slope up-to 10 degrees.
Multi speed levels

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Multi brake levels
Custom setting for acceleration and brake
Firmware upgrade
3. High Level Device Operation
The user/rider has to interact with the skateboard, remote, mobile application and charger. The detailed description on
working of each part is presented in the coming sections. But before that, let us discuss the high level operation of
GoBoard B2. The skateboard is powered on by pressing the power button on the skateboard. The skateboard should
always be powered after putting it on the ground and there should not be any weight on the skateboard. The skateboard
can be connected to mobile application at any instant of time once the skateboard has been powered on. When the
skateboard is powered on, the buzzer beeps once which shows a normal start up. But if the buzzer beeps twice soon
after powered on, it indicates the last shutdown was not normal (see section 4.3 for details). There are two modes of
operation i.e. remote control and body control.
3.1 Remote Control Mode
When the skateboard and remote are powered on and remote is connected to skateboard, the skateboard enters in the
remote control mode. The throttle stick on the remote is used to accelerate and brake. For details, see the upcoming
sections.
3.2 Balance Control Mode
When the skateboard is powered on and remote is disconnected to skateboard, the skateboard enters in the body control
mode. After getting on the device (see the below section), lean on left/right foot to accelerate and lean in opposite
direction to brake.
3.2.1 Getting on Skateboard in Balance Mode
Getting on skateboard in balance mode is a bit tricky. Put the skateboard on the perfectly flat ground and skateboard
should be static. Now first put your left/right foot on the respective corner of the skateboard and within a second put the
other foot on the other corner. The skateboard speed be zero in the process. Keep the distance between the legs as much
as you can. Once the rider has got on the device, the skateboard intimates the user by playing an alarming sound. If the
rider doesn’t hear the alarm, there could be two reasons i.e. the weight sensors might not be calibrated or the getting on
sequence is not right.

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4. Skateboard
The skateboard is the wooden board along with the wheels that carries a rider. The function of individual part of
skateboard is described below.
Figure 5 - Skateboard Labeled Diagram
4.1 Battery Casing
Battery casing is the covering and protecting plastic shield of the battery. This casing is not supposed to be opened in
normal conditions.
4.2 Mother Board Casing
Mother board casing is the covering and protecting metallic shield of mother board. This casing also dissipates the heat
of the mother board. This casing is not supposed to be opened in normal conditions.
4.3 Motors
There are two BLDC motors with hall sensors. Each motor is 300W. The motors provide the accelerating power and
electronic braking power to the skateboard controlled by the rider.
4.4 Weight Sensors
There are two weight sensors each installed on each side of the skateboard. These weight sensors measure the rider’s
total weight and the differential weight. These are used to drive the skateboard in body control mode.
4.5 Turning Screw
The turning screws on each side of the skateboard are adjusted to tune the turning force of the skateboard.

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4.6 Power Button
Power button is used to power on and power off the skateboard. Short pressing the button powers on the skateboard
and long pressing for 1.5 seconds powers off the skateboard. Powering off the skateboard only works when the
skateboard’s speed is zero. If the skateboard is powered on and it’s not being used for 10 minutes, the skateboard starts
to beep and automatically shuts down.
4.6.1 Head Light
Short pressing (less than 0.5 seconds, each time) the power switch 2 times one after other toggles the head light
followed by a beep.
4.6.2 Balance Control Mode
Short pressing (less than 0.5 seconds, each time) the power switch 3 times one after other toggles the balance control
mode from beginner mode (followed by two beeps) to advanced mode ( followed by one beep). Once you select the
control mode, that control mode is saved and selected forever unless you change it. Make sure your remote is
disconnected during this process.
4.6.3 Disable Auto Weight Sensor Calibration
Short pressing (less than 0.5 seconds, each time) the power switch 4 times one after other disables the auto weight
sensor calibration function. This process accompanies an alarm which lasts for 5 seconds and it is terminated by a beep.
Make sure during this process, your skateboard is placed perfectly flat on the ground and there should not be any weight
on the skateboard. Also the remote control should be powered off. This function cannot be enabled again unless you
restart your skateboard.
4.6.4 Motor Self-Run Test
Short pressing (less than 0.5 seconds, each time) the power switch 5 times one after executes motor self-run test. The
process starts with 4 beeps and ends with 4 beeps with an automatic shutdown. Make sure the motors of skateboard
should be unloaded and free to move otherwise this can disturb the normal function of the skateboard.
Note: The end user is not recommended to use this function.
4.6.5 Radio Pairing Mode
If we power on the skateboard by pressing the power on switch and keep holding it pressed for 6 seconds till a beep is
heard while the remote is not connected, the radio chip enters in the paring mode. The buzzer continuously beeps in this
mode.
4.6.6 Remote Throttle Stick Calibration
If we power on the skateboard by pressing the power on switch and keep holding it pressed for 6 seconds till a beep is
heard while the remote is connected, the remote throttle stick’s mean position is calibrated. The stick position should be
at mean position during this. A short beep indicates the process has finished.
4.6.7 Hard Shut Down
Long pressing the power button for 6 seconds after releasing the switch during power on will shut down the skateboard
in any case i.e. even motors speed is not zero.

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4.7 Charging Port
Charging port is used to charge the skateboard battery by plugging in charger pin. Ideally the skateboard should be
switched off while charging. It takes around 3 hours to charge the full battery from 0 percent to 100 percent.
5. Remote
The remote is used to control the skateboard in remote control mode. The function of individual part of remote is
described below.
Figure 6 - Remote Labeled Diagram
5.1 Throttle Knob
Pushing the throttle knob in the forward direction accelerates the skateboard and pushing in the backward direction
brakes the skateboard.
5.1.1 Skateboard Zero Speed Locking
If the skateboard speed is almost zero and throttle knob is pushed in the backward direction, the motors tend to lock the
position of the skateboard. The timeout for locking process in 10 seconds while the throttle knob is kept pushed and
motor is supplying braking power continuously. After the timeout, the motor is released.
5.2 Pairing Switch
Long pressing the pairing switch for 3 seconds while the skateboard is not connected to remote, the radio chip enters in
the paring mode. The connection led in this case blinks 1 time a second. This switch should not be used in normal case.
5.3 Shift Switch
The shift switch is used in multiple functions.

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5.3.1 Skateboard Heading
If the skateboard speed is less than 2 Km/h and the shift switch is pressed less than 1 second, the skateboard toggles its
heading.
5.3.2 Cruise Mode
If the skateboard speed is more than 2 Km/h and the shift switch is pressed less than 1 second, the skateboard enters the
cruise mode. Pushing the throttle knob in backward direction exits the cruise mode.
5.3.3 Head Light Control
Long pressing shift switch more than 4 seconds toggles the headlight.
5.4 Power Switch
If the power switch is pressed for more than 1 second, the remote is powered on. Doing so while the remote is powered
on shuts down the remote. If the remote is connected to skateboard and skateboard is powered off in normal conditions
(there is not any error state), the remote is also powered off automatically.
5.4.1 Speed Levels
There are 4 speed levels in remote control mode i.e. 10 Km/h, 20 Km/h, 30 Km/h and 40 Km/h stated as first, second,
third and fourth speed level respectively. Short pressing (less than 0.5 seconds, each time) the power switch x times one
after other selects the x speed level while the throttle stick is at mean position of higher (while accelerating). Where x
can be 1, 2, 3 and 4. The total time duration should not take more than a second. After a second, the number of beeps
ensures the selected speed level has been accepted successfully. The first 3 speed levels are normal speed levels, while
the 4 speed level is sports speed level. Only advanced riders are allowed to use this. When the skateboard is powered on
and remote is connected, the default speed level is level 1.
5.4.2 Brake Levels
There are 4 brake levels in remote control mode i.e. 25%, 50%, 75% and 100% stated as first, second, third and fourth
brake level respectively. Short pressing (less than 0.5 seconds, each time) the power switch x times one after other
selects the x brake level while the throttle stick is pushed backwards (while braking). Where x can be 1, 2, 3 and 4. The
total time duration should not take more than a second. After a second, the number of beeps ensures the selected brake
level has been accepted successfully. When the skateboard is powered on and remote is connected, the default brake
level is level 1.
5.5 Skateboard Battery LEDs
Skateboard battery LEDs represents the battery level of the skateboard battery once the skateboard is connected to
remote. There 4 LED representing 100%, 75%, 50% and 25%.
5.6 Connection LED
Connection LED shows the signal connection status. If the connection LED is constantly on, it means the remote is not
connected to skateboard. If the connection LED is blinking slowly i.e. approximately 2 times a second, it means the
remote is connected to skateboard and signal strength is good. If the connection LED is blinking fast i.e. approximately
5-6 times a second, it means the remote is connected to skateboard but the signal strength is poor. In remote pairing
mode, the connection LED blinks 1 times a second.

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5.7 Charging Port
The charging port is mini USB connector. The remote should be charged from 5V 1-2A power source via mini USB
cable.
5.8 Remote Battery LED
Remote battery LED represents the remote battery level. When the remote battery is being charged or battery level is
more than 20 percent, the led turns green. If the battery level is less than 20 percent, led turns red indicating the remote
battery needs to be charged.
6. Mobile Application
The mobile application is used to view the analytics of the skateboard, do custom settings and upgrade the firmware.
There are various pages, views and tabs of mobile application. They are discussed below.
6.1 App Bluetooth Search Page
Figure 7 – App Bluetooth Page
As the mobile application Roboconn is launched on phone, the application prompts the user to turn on the GPS and
Bluetooth. The available Bluetooth devices (only skateboards) are listed and the use can tap to connect with the device.
Once a valid device is connected, the application enters in the speedometer page. This page can also be skipped by the
taping the skip label. In that case, the different pages of application can be viewed but they are not fully functional.

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6.2 App Speedometer Page
Figure 8 – App Speedometer Page
The speedometer page shows the speed dial in Km/h, skateboard battery and remote battery if remote is connected. You
can go to settings page, dashboard page and social media page. App connection status turns green if app is connected,
else it is red. You can tap on it to reconnect the Bluetooth device.
6.3 App Dashboard Page
Figure 9 – App Dashboard Page
App dashboard page shows some useful information to the rider about the current ride. Also it can let user play the
GoBoard video.

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6.4 App Settings Page
Figure 10 – App Settings Page
On the setting page, you can do settings for balance control and remote control. Also you can view device information,
upgrade firmware, change Bluetooth name, control head light, lock/unlock the device and remotely switch off the
device. All the settings are saved in the memory.
6.5 App Balance Control Page
Figure 11 – App Balance Control Page
If the remote is not connected to the skateboard and the skateboard supports balance control, this page can be used for
balance control settings like sensor calibration, mode control, and maximum speed control and get on braking. Each
setting we do is replied and confirmed by a short buzzer sound from the skateboard.
6.5.1 Get on Braking Tab
When ‘Get on braking’ is enabled, the device wheels will be locked gently to assist the user getting on the device. Once
the rider has got on, the wheel braking disappears. If this is not enabled, the wheels will be free while getting on the
device. In beginner balance control mode, this tab is automatically switch on.

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6.6 App Calibration Sub-Page (Balance Control Mode)
Figure 12 – App Calibration Sub-Page
Calibration page is used to calibrate the weight sensor (load cells).
6.6.1 Weight Sensors Calibration Theory
There are two calibration constants of weight sensors. One is called offset and other is called gain. If the device is idle
i.e. there is not any rider standing on the skateboard and the weight sensors left or right (can be seen on device
information page) is not zero, the offset is needed to be calibrated. If the weight sensor values (left and right) both are
approximately 0, the offset is correct. If we put a heavy load about 10-40 Kg on the left corner of the skateboard and see
the deflection in left weight sensor value on device information page is not nearly equal to the weight we put on the
corner of the skateboard, it means the gain is needed to be calibrated for left weight sensor. Same thing we can repeat
for right weight sensor to check if its gain constant is correct or not. By default when the balance mode has not been
entered or the remote control is disconnected, the offset calibration is automatically happening every moment. Once you
get on enter the balance control mode, it is automatically disabled.
6.6.2 Enable Zero Calibration Tab
This is the replica of function mentioned in earlier in section 4.6.3. This process disables auto calibration function of
weight sensor and accompanies an alarm which lasts for 5 seconds and it is terminated by a beep. Make sure during this
process, your skateboard is placed perfectly flat on the ground and there should not be any weight on the skateboard.
Also the remote control should be powered off. This function cannot be enabled again unless you restart your
skateboard.
6.6.3 Zero Calibration at Every Power on Tab
This has not any function in the current version.
6.6.4 Advanced Calibration Tab
To calibrate the gain of left/right weight sensor, you must need to disable auto calibration function of weight sensors
first and then put a known weight (10-40 Kg) on the left/right corner of the skateboard. Then enable the advance
calibration tab. A drop down menu appears. Now select the number of left/right column equal to the weight you put on
the left/right corner of the skateboard. After that, just press ‘Done’ to calibrate gain. You need to repeat this process
individually for left and right weight sensors. But before everything, make sure the skateboard is powered on, remote is

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disconnected, there is no rider on the skateboard and skateboard is static and perfectly horizontal on the flat ground.
6.7 App Mode Control Sub-Page (Balance Control Mode)
Figure 13 – App Mode Control Sub-Page
This page is used to select one of the 3 control modes in the balance control. When the remote is disconnected and the
balance control is supported on the device, the skateboard enters the balance control mode. The balance control supports
three control modes i.e. beginner mode, advanced mode and custom mode. At any time, one of the modes is always
selected.
6.7.1 Beginner Mode Tab
In beginner mode, the balance control is very safe and soft. The speed is limited to 10 Km/h. This should be enabled for
a beginner. To switch the mode, the skateboard speed must be zero.
6.7.2 Advanced Mode Tab
In advanced mode, the balance control is hard and sensitive. The speed is limit can be set between 10Km/h to 40Km/h.
This the default mode. To switch the mode, the skateboard speed must be zero.
6.7.3 Custom Mode Tab
In custom mode, the user can set the brake and acceleration of balance control from 0 to 100 percent. The default values
are 100 percent for both. The speed is limit can be set between 10Km/h to 40Km/h. To switch the mode, the skateboard
speed must be zero.

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6.8 Maximum Speed Control Sub-Page (Balance Control Mode)
Figure 14 – App Maximum Speed Control Sub-Page
For balance control, in advanced and custom modes only, the user can adjust maximum speed between 10Km/h to
25Km/h. To set the speed, the skateboard speed must be zero. The balance control only supports maximum speed of
25Km/h.
6.9 App Remote Control Features Page
Figure 15 – App Remote Control Features Sub-Page
Remote Control Features page can be used to do remote control settings when the remote is connected.
6.9.1 De-acceleration Factor
The de-acceleration factor can be adjusted from 0 to 100 to set the slowing-down rate of the skateboard when the
remote stick is in the center and the skateboard speed is not zero. The default de-acceleration factor is 0.
6.9.2 Race and Brake Factors
Race and brake factors can also be adjusted between 0 and 100 to set the acceleration/brake feeling. The default values
are 100 percent for both.