It happened to me 3 times this week :

Suddenly, while flying, the quad rolls to the right to a stable angle (60 or 90), One time I managed to roll it back and save it but in 2 times, I couldn't take over it, and it crashed.

Today, I erased the Blackbox cache before going out to fly, So I hope that it will be possible to find the reason for this crash.
Another thing that I have noticed, is that when this situation happened, I had a warning text in my goggles, but I did not manage to read what was written.

Today, I think that I saw all or some of the following letters in the warning message : S, K, L, T, N

I have the Blackbox log, bit it is only 5.5 minutes long, and I am not sure if the event is there, but I do not know to read it.

Any help guys ?

5" quad, with SucceX-E F4 45A 2-6S Flight Stack (MPU6000)

Upload the blackbox log here, or host it to an external file hosting site with a link back here and we can try to take a look.

Do you have DVR capability in your goggles? If you do then always make a habit of recording all your flights so that (a) you can play them back and see all the OSD data; and (b) if you crash you have DVR footage to help you try and locate the quad.

I am surprised Snow didn't say that the iFlight is your problem. Get a new FC, problem solved.

1. Snow knows that it's my first quad, and that I am still a noob with the most basic equipment that I have found. for now.
but I am starting to get better components.
2. I don't have DVR, (goto line 1 LOL)
3. some usefull info :
a. I did erase blackbox before that flight.
b. I used 1 battery, everything was ok (5+- minutes flight time), and then, with the second battery it happened, some 2-4 minutes into flight. after the crash, when I established eye contact with the quad, I did take off LOS, pitched forward, and flew for 0.5 sec, and then crashed (this time it was my fault - LOS & ACRO).
c. I did manage to install the standalone betaflight explorer on my linux pc, but I don't really know to read the information.
d. but from what I could understand, it seems that i have only 5.5 minutes recorded in the blackbox, so it might be already full when the event took place.
e. should I change the frequency of recording, in order to have more time recorded ? currently, it's on 1KHZ, should i change it to 500hz (the lowest option)?

the blackbox file : https://www.dropbox.com/s/oe628r3uu069j6...h.BBL?dl=0

THNX

The blackbox log you posted did not look like it has the crash. you did one flip during the flight about 2:56 min in?

on a side note, you quad looks like it has a tons of oscillation? is the motor warm or hot at the end of your flight?

Wow. Those motor oscillations are really quite bad. Even your gyro seems to be noisy. Are you running a stock Betaflight tune on this quad, and do you have any low ESR capacitors installed?

Hey guys, just woke up here...

Yes, I know that I have oscillations, but as I can't compare it to a well tuned quad, It is still not so bad for me, Yep, I also have some jello, which I don't like. but first. let's prevent the falling off the sky suddenly, then, improve the quality of the flight.

And now for the business (no importance for the order, I just added more lines, whike responding to your posts):

-1. I am using 2 motors of one brand, 2 motors of different brand, they all are 2400kv. there were few crashes, only one of the motors (I can't remember now which) gets hotter than the rest, but not hot to touch, the rest of the motors, are hardly hot at all. the props, are all crooked, as I crashed them a lot, and twisted them to go back to flying (sorry for the expressions i use in english, it's not my native language off course), so, there are so many reasons why it is not a smooth flight, but the phenomenon mentioned in the title, feels to me, is more crucial issue.

0. Yes, I did a 360 roll (or maybe 2), and only one 360 flip during this flight.

1. Yes, I have installed 35v, 1000mF capacitor on the incoming power pad. it is not written on it 'Low ESR'. it is a Chongx VEHT capacitor (just from a brief browsing online this moment, it seems that people don't recommend them at all)
2. I will learn to work with PIDs, and gonna use dedicated ESCs, and so.... but right now, I don't have the money to buy the top notch equipment... but I am still learning a lot, and will use this info when building my next quad (as I have learned so much only from repairing the THS so many times).

3. I didn't change anything in the PIDs in Betaflight if this is what you mean by running stock betaflight tune (I am not sure what you mean by that)

4. Is there a way to erase all the data in the black box, while I am in the field ? (I know that there is a Betaflight version for android, but is there an easier way to do it ? )
In this way, I will be able to fly 4 minutes, erase, fly 4 minutes, erase, so I will be able to record a crash of this type for sure.

Are you running rpm filtering? If you are then I would turn that off if you are running a mixture of Frankenstein motors because that might just end up causing more issues that it solves.

Always use decent high quality brand capacitors. I never even heard of that brand you are using in my life before. I recommend the Panasonic FR or FM series of caps. I never use anything else. Have a read of another post HERE for which capacitor manufacturers are worth bothering with.

By stock tune yes, I meant default Betaflight setup without you making any PID or filter changes. If you want us to check, run both the "dump" and "diff all" commands in the Betaflight Configurator CLI tab and copy/paste the results back here and we will check for you.

You can set up blackbox erase on an auxiliary switch. Just set up a mode for that in the Modes tab of Betaflight Configurator. The mode is called "BLACKBOX ERASE (>30s)". As suggested by the name, it can takes more than 30 seconds to completely erase the flash chip memory.

Hi guys,
Well, Iwill get a better trustworthy capacitor asap,
At least the image in the goggles doesn't have the horizontal lines that I suffered from.
Yes, I have quit bad jello while flying.
I will use the Android app to erase BB every few minutes' until I get to record a falling event, but it will only be tommorrow, Iam going to support the protesters against the big G, which become more and more dictaturic in my tiny country LOL.
If I erase the BB file in the field using the Modes method, the VTX will become too hot (imo), is there a way also to shut the VTX with a switch ? (not with pit mode, as I don't have smart audio. I see this option in the Modes tab, but can it work w/out Smart Audio ?

Here are the output of dump & diff all :

Entering CLI Mode, type 'exit' to return, or 'help'

# dump

# version
# Betaflight / BETAFLIGHTF4 (BFF4) 4.0.4 Jun 30 2019 / 14:01:59 (f3a95efa3) MSP API: 1.41

# start the command batch
batch start

board_name BETAFLIGHTF4
manufacturer_id

# name
name SOURCE 1

# resources
resource BEEPER 1 B04
resource MOTOR 1 B00
resource MOTOR 2 B01
resource MOTOR 3 C09
resource MOTOR 4 C08
resource MOTOR 5 B06
resource MOTOR 6 NONE
resource MOTOR 7 NONE
resource MOTOR 8 NONE
resource SERVO 1 NONE
resource SERVO 2 NONE
resource SERVO 3 NONE
resource SERVO 4 NONE
resource SERVO 5 NONE
resource SERVO 6 NONE
resource SERVO 7 NONE
resource SERVO 8 NONE
resource PPM 1 B08
resource PWM 1 B08
resource PWM 2 NONE
resource PWM 3 NONE
resource PWM 4 NONE
resource PWM 5 NONE
resource PWM 6 NONE
resource PWM 7 NONE
resource PWM 8 NONE
resource LED_STRIP 1 B06
resource SERIAL_TX 1 A09
resource SERIAL_TX 2 A02
resource SERIAL_TX 3 B10
resource SERIAL_TX 4 NONE
resource SERIAL_TX 5 NONE
resource SERIAL_TX 6 NONE
resource SERIAL_TX 7 NONE
resource SERIAL_TX 8 NONE
resource SERIAL_TX 9 NONE
resource SERIAL_TX 10 NONE
resource SERIAL_TX 11 C06
resource SERIAL_TX 12 NONE
resource SERIAL_RX 1 A10
resource SERIAL_RX 2 A03
resource SERIAL_RX 3 B11
resource SERIAL_RX 4 NONE
resource SERIAL_RX 5 NONE
resource SERIAL_RX 6 C07
resource SERIAL_RX 7 NONE
resource SERIAL_RX 8 NONE
resource SERIAL_RX 9 NONE
resource SERIAL_RX 10 NONE
resource SERIAL_RX 11 NONE
resource SERIAL_RX 12 NONE
resource INVERTER 1 NONE
resource INVERTER 2 C13
resource INVERTER 3 NONE
resource INVERTER 4 NONE
resource INVERTER 5 NONE
resource INVERTER 6 NONE
resource INVERTER 7 NONE
resource INVERTER 8 NONE
resource INVERTER 9 NONE
resource INVERTER 10 NONE
resource INVERTER 11 NONE
resource INVERTER 12 NONE
resource I2C_SCL 1 NONE
resource I2C_SCL 2 NONE
resource I2C_SCL 3 NONE
resource I2C_SDA 1 NONE
resource I2C_SDA 2 NONE
resource I2C_SDA 3 NONE
resource LED 1 B05
resource LED 2 NONE
resource LED 3 NONE
resource RX_BIND 1 NONE
resource RX_BIND_PLUG 1 NONE
resource SPI_SCK 1 A05
resource SPI_SCK 2 B13
resource SPI_SCK 3 C10
resource SPI_MISO 1 A06
resource SPI_MISO 2 B14
resource SPI_MISO 3 C11
resource SPI_MOSI 1 A07
resource SPI_MOSI 2 B15
resource SPI_MOSI 3 C12
resource ESCSERIAL 1 B08
resource CAMERA_CONTROL 1 NONE
resource ADC_BATT 1 C02
resource ADC_RSSI 1 NONE
resource ADC_CURR 1 C01
resource ADC_EXT 1 NONE
resource BARO_CS 1 NONE
resource COMPASS_CS 1 NONE
resource PINIO 1 NONE
resource PINIO 2 NONE
resource PINIO 3 NONE
resource PINIO 4 NONE
resource USB_MSC_PIN 1 NONE
resource FLASH_CS 1 A15
resource OSD_CS 1 B12
resource GYRO_EXTI 1 C04
resource GYRO_EXTI 2 NONE
resource GYRO_CS 1 A04
resource GYRO_CS 2 NONE
resource USB_DETECT 1 C05

# timer
timer B08 AF3
# pin B08: TIM10 CH1 (AF3)
timer B00 AF2
# pin B00: TIM3 CH3 (AF2)
timer B01 AF2
# pin B01: TIM3 CH4 (AF2)
timer C09 AF3
# pin C09: TIM8 CH4 (AF3)
timer C08 AF3
# pin C08: TIM8 CH3 (AF3)
timer B06 AF2
# pin B06: TIM4 CH1 (AF2)
timer A09 AF1
# pin A09: TIM1 CH2 (AF1)
timer A10 AF1
# pin A10: TIM1 CH3 (AF1)
timer A02 AF2
# pin A02: TIM5 CH3 (AF2)
timer A03 AF3
# pin A03: TIM9 CH2 (AF3)
timer B10 AF1
# pin B10: TIM2 CH3 (AF1)
timer B11 AF1
# pin B11: TIM2 CH4 (AF1)

# dma
dma SPI_TX 1 NONE
dma SPI_TX 2 NONE
dma SPI_TX 3 NONE
dma SPI_RX 1 NONE
dma SPI_RX 2 NONE
dma SPI_RX 3 NONE
dma ADC 1 1
# ADC 1: DMA2 Stream 4 Channel 0
dma ADC 2 NONE
dma ADC 3 NONE
dma UART_TX 1 NONE
dma UART_TX 2 NONE
dma UART_TX 3 NONE
dma UART_TX 4 NONE
dma UART_TX 5 NONE
dma UART_TX 6 NONE
dma UART_TX 7 NONE
dma UART_TX 8 NONE
dma UART_RX 1 NONE
dma UART_RX 2 NONE
dma UART_RX 3 NONE
dma UART_RX 4 NONE
dma UART_RX 5 NONE
dma UART_RX 6 NONE
dma UART_RX 7 NONE
dma UART_RX 8 NONE
dma pin B08 NONE
dma pin B00 0
# pin B00: DMA1 Stream 7 Channel 5
dma pin B01 0
# pin B01: DMA1 Stream 2 Channel 5
dma pin C09 0
# pin C09: DMA2 Stream 7 Channel 7
dma pin C08 0
# pin C08: DMA2 Stream 2 Channel 0
dma pin B06 0
# pin B06: DMA1 Stream 0 Channel 2
dma pin A09 0
# pin A09: DMA2 Stream 6 Channel 0
dma pin A10 0
# pin A10: DMA2 Stream 6 Channel 0
dma pin A02 0
# pin A02: DMA1 Stream 0 Channel 6
dma pin A03 NONE
dma pin B10 0
# pin B10: DMA1 Stream 1 Channel 3
dma pin B11 0
# pin B11: DMA1 Stream 7 Channel 3

# mixer
mixer QUADX

mmix reset


# servo
servo 0 1000 2000 1500 100 -1
servo 1 1000 2000 1500 100 -1
servo 2 1000 2000 1500 100 -1
servo 3 1000 2000 1500 100 -1
servo 4 1000 2000 1500 100 -1
servo 5 1000 2000 1500 100 -1
servo 6 1000 2000 1500 100 -1
servo 7 1000 2000 1500 100 -1

# servo mix
smix reset



# feature
feature -RX_PPM
feature -INFLIGHT_ACC_CAL
feature -RX_SERIAL
feature -MOTOR_STOP
feature -SERVO_TILT
feature -SOFTSERIAL
feature -GPS
feature -RANGEFINDER
feature -TELEMETRY
feature -3D
feature -RX_PARALLEL_PWM
feature -RX_MSP
feature -RSSI_ADC
feature -LED_STRIP
feature -DISPLAY
feature -OSD
feature -CHANNEL_FORWARDING
feature -TRANSPONDER
feature -AIRMODE
feature -RX_SPI
feature -SOFTSPI
feature -ESC_SENSOR
feature -ANTI_GRAVITY
feature -DYNAMIC_FILTER
feature RX_SERIAL
feature SOFTSERIAL
feature TELEMETRY
feature RSSI_ADC
feature LED_STRIP
feature OSD
feature AIRMODE

# beeper
beeper -GYRO_CALIBRATED
beeper -RX_LOST
beeper -RX_LOST_LANDING
beeper -DISARMING
beeper -ARMING
beeper -ARMING_GPS_FIX
beeper ARMING_GPS_NO_FIX
beeper -BAT_CRIT_LOW
beeper -BAT_LOW
beeper -GPS_STATUS
beeper RX_SET
beeper -ACC_CALIBRATION
beeper -ACC_CALIBRATION_FAIL
beeper -READY_BEEP
beeper MULTI_BEEPS
beeper DISARM_REPEAT
beeper -ARMED
beeper -SYSTEM_INIT
beeper -ON_USB
beeper -BLACKBOX_ERASE
beeper -CRASH_FLIP
beeper -CAM_CONNECTION_OPEN
beeper -CAM_CONNECTION_CLOSE
beeper RC_SMOOTHING_INIT_FAIL

# beacon
beacon -RX_LOST
beacon RX_SET

# map
map TAER1234

# serial
serial 20 1 115200 57600 0 115200
serial 0 8192 115200 57600 0 115200
serial 1 64 115200 57600 0 115200
serial 2 0 115200 57600 0 115200
serial 5 0 115200 57600 0 115200
serial 30 32 115200 57600 0 115200

# led
led 0 10,0::CB:10
led 1 10,1::CB:10
led 2 10,2::CB:4
led 3 10,3::CB:4
led 4 10,4::CB:2
led 5 10,5::CB:2
led 6 0,0::C:0
led 7 0,0::C:0
led 8 0,0::C:0
led 9 0,0::C:0
led 10 0,0::C:0
led 11 0,0::C:0
led 12 0,0::C:0
led 13 0,0::C:0
led 14 0,0::C:0
led 15 0,0::C:0
led 16 0,0::C:0
led 17 0,0::C:0
led 18 0,0::C:0
led 19 0,0::C:0
led 20 0,0::C:0
led 21 0,0::C:0
led 22 0,0::C:0
led 23 0,0::C:0
led 24 0,0::C:0
led 25 0,0::C:0
led 26 0,0::C:0
led 27 0,0::C:0
led 28 0,0::C:0
led 29 0,0::C:0
led 30 0,0::C:0
led 31 0,0::C:0

# color
color 0 0,0,0
color 1 0,255,255
color 2 0,0,255
color 3 30,0,255
color 4 60,0,255
color 5 90,0,255
color 6 120,0,255
color 7 150,0,255
color 8 180,0,255
color 9 210,0,255
color 10 240,0,255
color 11 270,0,255
color 12 300,0,255
color 13 330,0,255
color 14 0,0,0
color 15 0,0,0

# mode_color
mode_color 0 0 1
mode_color 0 1 11
mode_color 0 2 2
mode_color 0 3 13
mode_color 0 4 10
mode_color 0 5 3
mode_color 1 0 5
mode_color 1 1 11
mode_color 1 2 3
mode_color 1 3 13
mode_color 1 4 10
mode_color 1 5 3
mode_color 2 0 10
mode_color 2 1 11
mode_color 2 2 4
mode_color 2 3 13
mode_color 2 4 10
mode_color 2 5 3
mode_color 3 0 8
mode_color 3 1 11
mode_color 3 2 4
mode_color 3 3 13
mode_color 3 4 10
mode_color 3 5 3
mode_color 4 0 7
mode_color 4 1 11
mode_color 4 2 3
mode_color 4 3 13
mode_color 4 4 10
mode_color 4 5 3
mode_color 5 0 0
mode_color 5 1 0
mode_color 5 2 0
mode_color 5 3 0
mode_color 5 4 0
mode_color 5 5 0
mode_color 6 0 6
mode_color 6 1 10
mode_color 6 2 1
mode_color 6 3 0
mode_color 6 4 0
mode_color 6 5 2
mode_color 6 6 3
mode_color 6 7 6
mode_color 6 8 0
mode_color 6 9 0
mode_color 6 10 0
mode_color 7 0 3

# aux
aux 0 0 0 1650 2100 0 0
aux 1 1 1 900 1300 0 0
aux 2 2 1 1300 1700 0 0
aux 3 13 2 900 1325 0 0
aux 4 0 0 900 900 0 0
aux 5 0 0 900 900 0 0
aux 6 0 0 900 900 0 0
aux 7 0 0 900 900 0 0
aux 8 0 0 900 900 0 0
aux 9 0 0 900 900 0 0
aux 10 0 0 900 900 0 0
aux 11 0 0 900 900 0 0
aux 12 0 0 900 900 0 0
aux 13 0 0 900 900 0 0
aux 14 0 0 900 900 0 0
aux 15 0 0 900 900 0 0
aux 16 0 0 900 900 0 0
aux 17 0 0 900 900 0 0
aux 18 0 0 900 900 0 0
aux 19 0 0 900 900 0 0

# adjrange
adjrange 0 0 0 900 900 0 0 0 0
adjrange 1 0 0 900 900 0 0 0 0
adjrange 2 0 0 900 900 0 0 0 0
adjrange 3 0 0 900 900 0 0 0 0
adjrange 4 0 0 900 900 0 0 0 0
adjrange 5 0 0 900 900 0 0 0 0
adjrange 6 0 0 900 900 0 0 0 0
adjrange 7 0 0 900 900 0 0 0 0
adjrange 8 0 0 900 900 0 0 0 0
adjrange 9 0 0 900 900 0 0 0 0
adjrange 10 0 0 900 900 0 0 0 0
adjrange 11 0 0 900 900 0 0 0 0
adjrange 12 0 0 900 900 0 0 0 0
adjrange 13 0 0 900 900 0 0 0 0
adjrange 14 0 0 900 900 0 0 0 0
adjrange 15 0 0 900 900 0 0 0 0
adjrange 16 0 0 900 900 0 0 0 0
adjrange 17 0 0 900 900 0 0 0 0
adjrange 18 0 0 900 900 0 0 0 0
adjrange 19 0 0 900 900 0 0 0 0
adjrange 20 0 0 900 900 0 0 0 0
adjrange 21 0 0 900 900 0 0 0 0
adjrange 22 0 0 900 900 0 0 0 0
adjrange 23 0 0 900 900 0 0 0 0
adjrange 24 0 0 900 900 0 0 0 0
adjrange 25 0 0 900 900 0 0 0 0
adjrange 26 0 0 900 900 0 0 0 0
adjrange 27 0 0 900 900 0 0 0 0
adjrange 28 0 0 900 900 0 0 0 0
adjrange 29 0 0 900 900 0 0 0 0

# rxrange
rxrange 0 1000 2000
rxrange 1 1000 2000
rxrange 2 1000 2000
rxrange 3 1000 2000

# vtx
vtx 0 0 0 0 900 900
vtx 1 0 0 0 900 900
vtx 2 0 0 0 900 900
vtx 3 0 0 0 900 900
vtx 4 0 0 0 900 900
vtx 5 0 0 0 900 900
vtx 6 0 0 0 900 900
vtx 7 0 0 0 900 900
vtx 8 0 0 0 900 900
vtx 9 0 0 0 900 900

# rxfail
rxfail 0 a
rxfail 1 a
rxfail 2 a
rxfail 3 h
rxfail 4 h
rxfail 5 h
rxfail 6 h
rxfail 7 h
rxfail 8 h
rxfail 9 h
rxfail 10 h
rxfail 11 h
rxfail 12 h
rxfail 13 h
rxfail 14 h
rxfail 15 h
rxfail 16 h
rxfail 17 h

# display_name
display_name -

# master
set gyro_hardware_lpf = NORMAL
set gyro_sync_denom = 2
set gyro_lowpass_type = BIQUAD
set gyro_lowpass_hz = 150
set gyro_lowpass2_type = PT1
set gyro_lowpass2_hz = 150
set gyro_notch1_hz = 0
set gyro_notch1_cutoff = 0
set gyro_notch2_hz = 0
set gyro_notch2_cutoff = 0
set gyro_calib_duration = 125
set gyro_calib_noise_limit = 48
set gyro_offset_yaw = 0
set gyro_overflow_detect = ALL
set yaw_spin_recovery = ON
set yaw_spin_threshold = 1950
set gyro_to_use = FIRST
set dyn_notch_range = AUTO
set dyn_notch_width_percent = 8
set dyn_notch_q = 120
set dyn_notch_min_hz = 150
set dyn_lpf_gyro_min_hz = 150
set dyn_lpf_gyro_max_hz = 450
set gyro_filter_debug_axis = ROLL
set acc_hardware = AUTO
set acc_lpf_hz = 10
set acc_trim_pitch = -2
set acc_trim_roll = 0
set acc_calibration = -230,61,-14
set align_mag = DEFAULT
set mag_bustype = I2C
set mag_i2c_device = 2
set mag_i2c_address = 0
set mag_spi_device = 0
set mag_hardware = NONE
set mag_declination = 0
set mag_calibration = 0,0,0
set baro_bustype = I2C
set baro_spi_device = 0
set baro_i2c_device = 2
set baro_i2c_address = 0
set baro_hardware = NONE
set baro_tab_size = 21
set baro_noise_lpf = 600
set baro_cf_vel = 985
set mid_rc = 1500
set min_check = 1050
set max_check = 1900
set rssi_channel = 0
set rssi_src_frame_errors = OFF
set rssi_scale = 100
set rssi_offset = 0
set rssi_invert = OFF
set rc_interp = AUTO
set rc_interp_ch = RPYT
set rc_interp_int = 19
set rc_smoothing_type = FILTER
set rc_smoothing_input_hz = 0
set rc_smoothing_derivative_hz = 0
set rc_smoothing_debug_axis = ROLL
set rc_smoothing_input_type = BIQUAD
set rc_smoothing_derivative_type = BIQUAD
set rc_smoothing_auto_smoothness = 10
set fpv_mix_degrees = 0
set max_aux_channels = 14
set serialrx_provider = SBUS
set serialrx_inverted = OFF
set spektrum_sat_bind = 0
set spektrum_sat_bind_autoreset = ON
set airmode_start_throttle_percent = 25
set rx_min_usec = 885
set rx_max_usec = 2115
set serialrx_halfduplex = OFF
set adc_device = 1
set adc_vrefint_calibration = 0
set adc_tempsensor_calibration30 = 0
set adc_tempsensor_calibration110 = 0
set input_filtering_mode = OFF
set blackbox_p_ratio = 32
set blackbox_device = SPIFLASH
set blackbox_record_acc = ON
set blackbox_mode = NORMAL
set min_throttle = 1070
set max_throttle = 2000
set min_command = 1000
set dshot_idle_value = 200
set dshot_burst = OFF
set dshot_bidir = OFF
set use_unsynced_pwm = OFF
set motor_pwm_protocol = DSHOT600
set motor_pwm_rate = 480
set motor_pwm_inversion = OFF
set motor_poles = 14
set thr_corr_value = 0
set thr_corr_angle = 800
set failsafe_delay = 5
set failsafe_off_delay = 10
set failsafe_throttle = 1000
set failsafe_switch_mode = STAGE1
set failsafe_throttle_low_delay = 100
set failsafe_procedure = DROP
set align_board_roll = 0
set align_board_pitch = 0
set align_board_yaw = 0
set gimbal_mode = NORMAL
set bat_capacity = 0
set vbat_max_cell_voltage = 430
set vbat_full_cell_voltage = 410
set vbat_min_cell_voltage = 330
set vbat_warning_cell_voltage = 350
set vbat_hysteresis = 1
set current_meter = ADC
set battery_meter = ADC
set vbat_detect_cell_voltage = 300
set use_vbat_alerts = ON
set use_cbat_alerts = OFF
set cbat_alert_percent = 10
set vbat_cutoff_percent = 100
set force_battery_cell_count = 0
set vbat_lpf_period = 30
set ibat_lpf_period = 10
set vbat_scale = 110
set vbat_divider = 10
set vbat_multiplier = 1
set ibata_scale = 400
set ibata_offset = 0
set ibatv_scale = 0
set ibatv_offset = 0
set beeper_inversion = ON
set beeper_od = OFF
set beeper_frequency = 0
set beeper_dshot_beacon_tone = 1
set yaw_motors_reversed = OFF
set crashflip_motor_percent = 0
set 3d_deadband_low = 1406
set 3d_deadband_high = 1514
set 3d_neutral = 1460
set 3d_deadband_throttle = 50
set 3d_limit_low = 1000
set 3d_limit_high = 2000
set 3d_switched_mode = OFF
set servo_center_pulse = 1500
set servo_pwm_rate = 50
set servo_lowpass_hz = 0
set tri_unarmed_servo = ON
set channel_forwarding_start = 4
set reboot_character = 82
set serial_update_rate_hz = 100
set imu_dcm_kp = 2500
set imu_dcm_ki = 0
set small_angle = 25
set auto_disarm_delay = 5
set gyro_cal_on_first_arm = OFF
set gps_provider = NMEA
set gps_sbas_mode = AUTO
set gps_auto_config = ON
set gps_auto_baud = OFF
set gps_ublox_use_galileo = OFF
set gps_set_home_point_once = OFF
set gps_rescue_angle = 32
set gps_rescue_initial_alt = 50
set gps_rescue_descent_dist = 200
set gps_rescue_ground_speed = 2000
set gps_rescue_throttle_p = 150
set gps_rescue_throttle_i = 20
set gps_rescue_throttle_d = 50
set gps_rescue_velocity_p = 80
set gps_rescue_velocity_i = 20
set gps_rescue_velocity_d = 15
set gps_rescue_yaw_p = 40
set gps_rescue_throttle_min = 1200
set gps_rescue_throttle_max = 1600
set gps_rescue_throttle_hover = 1280
set gps_rescue_sanity_checks = RESCUE_SANITY_ON
set gps_rescue_min_sats = 8
set gps_rescue_min_dth = 100
set gps_rescue_allow_arming_without_fix = OFF
set gps_rescue_use_mag = ON
set deadband = 0
set yaw_deadband = 0
set yaw_control_reversed = OFF
set pid_process_denom = 1
set runaway_takeoff_prevention = ON
set runaway_takeoff_deactivate_delay = 500
set runaway_takeoff_deactivate_throttle_percent = 20
set thrust_linear = 0
set transient_throttle_limit = 15
set tlm_inverted = OFF
set tlm_halfduplex = ON
set frsky_default_lat = 0
set frsky_default_long = 0
set frsky_gps_format = 0
set frsky_unit = IMPERIAL
set frsky_vfas_precision = 0
set hott_alarm_int = 5
set pid_in_tlm = OFF
set report_cell_voltage = OFF
set ibus_sensor = 1,2,3,0,0,0,0,0,0,0,0,0,0,0,0
set mavlink_mah_as_heading_divisor = 0
set telemetry_disabled_voltage = OFF
set telemetry_disabled_current = OFF
set telemetry_disabled_fuel = OFF
set telemetry_disabled_mode = OFF
set telemetry_disabled_acc_x = OFF
set telemetry_disabled_acc_y = OFF
set telemetry_disabled_acc_z = OFF
set telemetry_disabled_pitch = OFF
set telemetry_disabled_roll = OFF
set telemetry_disabled_heading = OFF
set telemetry_disabled_altitude = OFF
set telemetry_disabled_vario = OFF
set telemetry_disabled_lat_long = OFF
set telemetry_disabled_ground_speed = OFF
set telemetry_disabled_distance = OFF
set telemetry_disabled_esc_current = ON
set telemetry_disabled_esc_voltage = ON
set telemetry_disabled_esc_rpm = ON
set telemetry_disabled_esc_temperature = ON
set telemetry_disabled_temperature = OFF
set ledstrip_visual_beeper = OFF
set ledstrip_visual_beeper_color = WHITE
set ledstrip_grb_rgb = GRB
set ledstrip_profile = STATUS
set ledstrip_race_color = ORANGE
set ledstrip_beacon_color = WHITE
set ledstrip_beacon_period_ms = 500
set ledstrip_beacon_percent = 50
set ledstrip_beacon_armed_only = OFF
set osd_units = METRIC
set osd_warn_arming_disable = ON
set osd_warn_batt_not_full = ON
set osd_warn_batt_warning = ON
set osd_warn_batt_critical = ON
set osd_warn_visual_beeper = ON
set osd_warn_crash_flip = ON
set osd_warn_esc_fail = ON
set osd_warn_core_temp = OFF
set osd_warn_rc_smoothing = OFF
set osd_warn_fail_safe = OFF
set osd_warn_launch_control = OFF
set osd_warn_no_gps_rescue = OFF
set osd_warn_gps_rescue_disabled = OFF
set osd_rssi_alarm = 20
set osd_cap_alarm = 2200
set osd_alt_alarm = 100
set osd_esc_temp_alarm = -128
set osd_esc_rpm_alarm = -1
set osd_esc_current_alarm = -1
set osd_core_temp_alarm = 70
set osd_ah_max_pit = 20
set osd_ah_max_rol = 40
set osd_ah_invert = OFF
set osd_tim1 = 2560
set osd_tim2 = 2561
set osd_vbat_pos = 2413
set osd_rssi_pos = 2403
set osd_link_quality_pos = 234
set osd_tim_1_pos = 234
set osd_tim_2_pos = 2422
set osd_remaining_time_estimate_pos = 234
set osd_flymode_pos = 2092
set osd_anti_gravity_pos = 234
set osd_g_force_pos = 234
set osd_throttle_pos = 2086
set osd_vtx_channel_pos = 234
set osd_crosshairs_pos = 205
set osd_ah_sbar_pos = 206
set osd_ah_pos = 78
set osd_current_pos = 234
set osd_mah_drawn_pos = 234
set osd_motor_diag_pos = 234
set osd_craft_name_pos = 234
set osd_display_name_pos = 234
set osd_gps_speed_pos = 234
set osd_gps_lon_pos = 234
set osd_gps_lat_pos = 234
set osd_gps_sats_pos = 234
set osd_home_dir_pos = 234
set osd_home_dist_pos = 234
set osd_flight_dist_pos = 234
set osd_compass_bar_pos = 234
set osd_altitude_pos = 234
set osd_pid_roll_pos = 234
set osd_pid_pitch_pos = 234
set osd_pid_yaw_pos = 234
set osd_debug_pos = 234
set osd_power_pos = 234
set osd_pidrate_profile_pos = 234
set osd_warnings_pos = 2282
set osd_avg_cell_voltage_pos = 234
set osd_pit_ang_pos = 234
set osd_rol_ang_pos = 234
set osd_battery_usage_pos = 234
set osd_disarmed_pos = 234
set osd_nheading_pos = 234
set osd_nvario_pos = 234
set osd_esc_tmp_pos = 234
set osd_esc_rpm_pos = 234
set osd_esc_rpm_freq_pos = 234
set osd_rtc_date_time_pos = 234
set osd_adjustment_range_pos = 234
set osd_flip_arrow_pos = 234
set osd_core_temp_pos = 234
set osd_log_status_pos = 234
set osd_stick_overlay_left_pos = 234
set osd_stick_overlay_right_pos = 234
set osd_stick_overlay_radio_mode = 2
set osd_stat_rtc_date_time = OFF
set osd_stat_tim_1 = OFF
set osd_stat_tim_2 = ON
set osd_stat_max_spd = OFF
set osd_stat_max_dist = OFF
set osd_stat_min_batt = ON
set osd_stat_endbatt = ON
set osd_stat_battery = ON
set osd_stat_min_rssi = ON
set osd_stat_max_curr = OFF
set osd_stat_used_mah = OFF
set osd_stat_max_alt = OFF
set osd_stat_bbox = OFF
set osd_stat_bb_no = OFF
set osd_stat_max_g_force = OFF
set osd_stat_max_esc_temp = OFF
set osd_stat_max_esc_rpm = OFF
set osd_stat_min_link_quality = OFF
set osd_stat_flight_dist = OFF
set osd_stat_max_fft = OFF
set osd_profile = 1
set system_hse_mhz = 8
set task_statistics = ON
set debug_mode = NONE
set rate_6pos_switch = OFF
set cpu_overclock = OFF
set pwr_on_arm_grace = 5
set scheduler_optimize_rate = OFF
set vtx_band = 4
set vtx_channel = 1
set vtx_power = 1
set vtx_low_power_disarm = OFF
set vtx_freq = 5740
set vtx_pit_mode_freq = 0
set vtx_halfduplex = ON
set vcd_video_system = AUTO
set vcd_h_offset = 0
set vcd_v_offset = 0
set max7456_clock = DEFAULT
set max7456_spi_bus = 2
set max7456_preinit_opu = OFF
set displayport_msp_col_adjust = 0
set displayport_msp_row_adjust = 0
set displayport_max7456_col_adjust = 0
set displayport_max7456_row_adjust = 0
set displayport_max7456_inv = OFF
set displayport_max7456_blk = 0
set displayport_max7456_wht = 2
set esc_sensor_halfduplex = OFF
set esc_sensor_current_offset = 0
set led_inversion = 0
set dashboard_i2c_bus = 2
set dashboard_i2c_addr = 60
set camera_control_mode = HARDWARE_PWM
set camera_control_ref_voltage = 330
set camera_control_key_delay = 180
set camera_control_internal_resistance = 470
set camera_control_inverted = OFF
set pinio_config = 1,1,1,1
set pinio_box = 255,255,255,255
set usb_hid_cdc = OFF
set usb_msc_pin_pullup = ON
set flash_spi_bus = 3
set rcdevice_init_dev_attempts = 6
set rcdevice_init_dev_attempt_interval = 1000
set rcdevice_protocol_version = 0
set rcdevice_feature = 0
set gyro_1_bustype = SPI
set gyro_1_spibus = 1
set gyro_1_i2cBus = 0
set gyro_1_i2c_address = 0
set gyro_1_sensor_align = CW180
set gyro_2_bustype = SPI
set gyro_2_spibus = 1
set gyro_2_i2cBus = 0
set gyro_2_i2c_address = 0
set gyro_2_sensor_align = DEFAULT
set timezone_offset_minutes = 0
set gyro_rpm_notch_harmonics = 3
set gyro_rpm_notch_q = 500
set gyro_rpm_notch_min = 100
set dterm_rpm_notch_harmonics = 0
set dterm_rpm_notch_q = 500
set dterm_rpm_notch_min = 100
set rpm_notch_lpf = 150

# profile
profile 0

set dyn_lpf_dterm_min_hz = 150
set dyn_lpf_dterm_max_hz = 250
set dterm_lowpass_type = BIQUAD
set dterm_lowpass_hz = 150
set dterm_lowpass2_type = PT1
set dterm_lowpass2_hz = 100
set dterm_notch_hz = 0
set dterm_notch_cutoff = 0
set vbat_pid_gain = OFF
set pid_at_min_throttle = ON
set anti_gravity_mode = SMOOTH
set anti_gravity_threshold = 250
set anti_gravity_gain = 5000
set feedforward_transition = 0
set acc_limit_yaw = 0
set acc_limit = 0
set crash_dthreshold = 50
set crash_gthreshold = 400
set crash_setpoint_threshold = 350
set crash_time = 500
set crash_delay = 0
set crash_recovery_angle = 10
set crash_recovery_rate = 100
set crash_limit_yaw = 200
set crash_recovery = OFF
set iterm_rotation = OFF
set smart_feedforward = OFF
set iterm_relax = RP
set iterm_relax_type = SETPOINT
set iterm_relax_cutoff = 20
set iterm_windup = 100
set iterm_limit = 400
set pidsum_limit = 500
set pidsum_limit_yaw = 400
set yaw_lowpass_hz = 0
set throttle_boost = 5
set throttle_boost_cutoff = 15
set acro_trainer_angle_limit = 20
set acro_trainer_lookahead_ms = 50
set acro_trainer_debug_axis = ROLL
set acro_trainer_gain = 75
set p_pitch = 46
set i_pitch = 70
set d_pitch = 38
set f_pitch = 75
set p_roll = 42
set i_roll = 60
set d_roll = 35
set f_roll = 70
set p_yaw = 35
set i_yaw = 100
set d_yaw = 0
set f_yaw = 0
set angle_level_strength = 50
set horizon_level_strength = 50
set horizon_transition = 75
set level_limit = 55
set horizon_tilt_effect = 75
set horizon_tilt_expert_mode = OFF
set abs_control_gain = 0
set abs_control_limit = 90
set abs_control_error_limit = 20
set abs_control_cutoff = 11
set use_integrated_yaw = OFF
set integrated_yaw_relax = 200
set d_min_roll = 20
set d_min_pitch = 22
set d_min_yaw = 0
set d_min_boost_gain = 27
set d_min_advance = 20
set motor_output_limit = 100
set auto_profile_cell_count = 0
set launch_control_mode = NORMAL
set launch_trigger_allow_reset = ON
set launch_trigger_throttle_percent = 20
set launch_angle_limit = 0
set launch_control_gain = 40

# rateprofile
rateprofile 0

set thr_mid = 50
set thr_expo = 0
set rates_type = BETAFLIGHT
set roll_rc_rate = 100
set pitch_rc_rate = 100
set yaw_rc_rate = 100
set roll_expo = 0
set pitch_expo = 0
set yaw_expo = 0
set roll_srate = 70
set pitch_srate = 70
set yaw_srate = 70
set tpa_rate = 50
set tpa_breakpoint = 1500
set tpa_mode = D
set throttle_limit_type = OFF
set throttle_limit_percent = 100
set roll_rate_limit = 1998
set pitch_rate_limit = 1998
set yaw_rate_limit = 1998

# end the command batch
batch end

# diff all

# version
# Betaflight / BETAFLIGHTF4 (BFF4) 4.0.4 Jun 30 2019 / 14:01:59 (f3a95efa3) MSP API: 1.41

# start the command batch
batch start

# reset configuration to default settings
defaults nosave

board_name BETAFLIGHTF4
manufacturer_id
mcu_id 0035005c324d501020303256
signature

# name
name SOURCE 1

# resources
resource SERIAL_TX 6 NONE
resource SERIAL_TX 11 C06

# timer

# dma

# mixer

# servo

# servo mix


# feature
feature -ANTI_GRAVITY
feature -DYNAMIC_FILTER
feature SOFTSERIAL
feature RSSI_ADC
feature LED_STRIP

# beeper
beeper -GYRO_CALIBRATED
beeper -RX_LOST
beeper -RX_LOST_LANDING
beeper -DISARMING
beeper -ARMING
beeper -ARMING_GPS_FIX
beeper -BAT_CRIT_LOW
beeper -BAT_LOW
beeper -GPS_STATUS
beeper -ACC_CALIBRATION
beeper -ACC_CALIBRATION_FAIL
beeper -READY_BEEP
beeper -ARMED
beeper -SYSTEM_INIT
beeper -ON_USB
beeper -BLACKBOX_ERASE
beeper -CRASH_FLIP
beeper -CAM_CONNECTION_OPEN
beeper -CAM_CONNECTION_CLOSE

# beacon
beacon RX_SET

# map
map TAER1234

# serial
serial 0 8192 115200 57600 0 115200
serial 1 64 115200 57600 0 115200
serial 5 0 115200 57600 0 115200
serial 30 32 115200 57600 0 115200

# led
led 0 10,0::CB:10
led 1 10,1::CB:10
led 2 10,2::CB:4
led 3 10,3::CB:4
led 4 10,4::CB:2
led 5 10,5::CB:2

# color

# mode_color

# aux
aux 0 0 0 1650 2100 0 0
aux 1 1 1 900 1300 0 0
aux 2 2 1 1300 1700 0 0
aux 3 13 2 900 1325 0 0

# adjrange

# rxrange

# vtx

# rxfail
rxfail 3 h

# display_name

# master
set gyro_sync_denom = 2
set acc_trim_pitch = -2
set acc_calibration = -230,61,-14
set mag_hardware = NONE
set baro_hardware = NONE
set dshot_idle_value = 200
set motor_pwm_protocol = DSHOT600
set failsafe_delay = 5
set current_meter = ADC
set battery_meter = ADC
set pid_process_denom = 1
set osd_warn_core_temp = OFF
set osd_warn_rc_smoothing = OFF
set osd_warn_fail_safe = OFF
set osd_warn_launch_control = OFF
set osd_warn_no_gps_rescue = OFF
set osd_warn_gps_rescue_disabled = OFF
set osd_vbat_pos = 2413
set osd_rssi_pos = 2403
set osd_tim_2_pos = 2422
set osd_flymode_pos = 2092
set osd_throttle_pos = 2086
set osd_warnings_pos = 2282
set osd_stat_max_spd = OFF
set osd_stat_endbatt = ON
set osd_stat_battery = ON
set osd_stat_max_curr = OFF
set osd_stat_used_mah = OFF
set osd_stat_bbox = OFF
set osd_stat_bb_no = OFF

# profile
profile 0


# profile
profile 1


# profile
profile 2


# restore original profile selection
profile 0

# rateprofile
rateprofile 0


# rateprofile
rateprofile 1


# rateprofile
rateprofile 2


# rateprofile
rateprofile 3


# rateprofile
rateprofile 4


# rateprofile
rateprofile 5


# restore original rateprofile selection
rateprofile 0

# save configuration
save

Well your dump proves that you are on the default (stock) Betaflight PIDs and filter settings.

As for switching off the VTX then no, if it doesn't have pit mode then there is no way to switch it off. The best you can do without SmartAudio is to just manually switch the VTX to it's lowest power setting if you want to work with it on the bench, and then manually switch it back to a higher power setting again later after your bench work is complete. We might have been through this in a previous thread (I forget), but what VTX do you have and why can you not get SmartAudio working?

Hi guys,
I wen to fly today, with the same quad mentioned in this thread, and I have experienced two problems:
1. the quad tilts to the left slowly, so I have to correct every few seconds. this happened during the whole flight.
2. the problem mentioned in the title of this thread : suddenly, after around 4 minutes (not sure exactly, it fell of the sky, after suddenly, tilting to the left/or/right - I am not sure, as it always happens out of the blue..., it tilted some 90 degrees, and fell of the sky.
Here is the BlackBox file, the crash was the last event off course. Praise the Lord for the invention of the independent buzzer !!!
https://www.dropbox.com/s/2wlyrdktwcgql1...4.BBL?dl=0
There is no DVR
3. Re-thinking about the event, I think, that I heard a BEEP, or double BEEP from the quad at the time of the crash. But I am not sure about it.

Well, will you find out please what is wrong with my quad ?
BTW, Leo, I got Panasonic low ESR caps, I will soon replace the cheap cap I have right now.

(12-Aug-2020, 01:13 PM)doronba Wrote: Hi guys,
I wen to fly today, with the same quad mentioned in this thread, and I have experienced two problems:
1. the quad tilts to the left slowly, so I have to correct every few seconds. this happened during the whole flight.
2. the problem mentioned in the title of this thread : suddenly, after around 4 minutes (not sure exactly, it fell of the sky, after suddenly, tilting to the left/or/right - I am not sure, as it always happens out of the blue..., it tilted some 90 degrees, and fell of the sky.
Here is the BlackBox file, the crash was the last event off course. Praise the Lord for the invention of the independent buzzer !!!
https://www.dropbox.com/s/2wlyrdktwcgql1...4.BBL?dl=0
There is no DVR

Well, will you find out please what is wrong with my quad ?
BTW, Leo, I got Panasonic low ESR caps, I will soon replace the cheap cap I have right now.

It looks like your sticks aren't completely centred when you start. Assuming you didn't move the sticks before you arm then you've got a constant +8 on yaw, and -7 on roll. If you don't touch anything on the transmitter, what does the receiver tab in Betaflight show? If it's not 1000 on throttle and 1500 on roll, pitch and yaw then check that your trims are centred, and then you'll want to set up your endpoints/midpoints. Oscar, as always, can help you out:

https://oscarliang.com/adjust-tx-channel-mid-end-point/

I had a quick look at your log, and it doesn't actually finish. It's almost like the FC resets or something. Before you crashed did you lose video? Just before it cuts off, though, your yaw setpoint jumps to -224 and sits there for half a second. I have no idea why that might be, but it ain't right.

Thank you Banelle,
It might indeed be something related to trimming / Betaflight 1000-1500 issue - I will check it later today.
The other thing that You have mentioned about the last 0.5 second is, in my opinion, the reason for the recurring crashes that I had experienced recently - this is probably the most important issue to tackle down and understand / fix

What receiver are you using? Looking at your black box log, I see some strange things...

Throughout the flight, your RSSI value is at around 43%, which seems rather low. Then, just before the black box log cuts off, I see the RSSI value drop to 40.2% and receiver loses signal. It holds the current channel values for a short while (seemingly holding last values in case the signal comes back) and then the receiver tells the flight controller it has lost the signal. Instead of the channels going to zero throttle and centred pitch, roll and yaw, the throttle signal stays at the last known value.

So, the first thing to say is that your failsafe settings for the receiver are not set up properly. The second is that the failsafe mode on the flight controller doesn't seem to be right either as if it was set to "drop", it should cut the throttle.

Holding the last throttle value when the receiver loses the signal is really dangerous. If you were to lose the signal when you were at full throttle, it will stay at that setting and the results could be far from fun, depending where the quad is pointed when it loses the signal...

I am using RXSR, with 2 antennas, though, one of them was disconnected after a crash, and I replaced it with a new one.
Unfortunately, I don't remember, whether this behavior started before or after this event (and it's quit a useful information, right ?).
I am using Taranis QX7, and something that I have realized some months ago, is, that the RSSI level is always around 40%, it was never even close to 100%. it starts there, and stays there during all the flight.
I got new capacitor, and new VTX, so, maybe I should replace the RXSR with my old XM+ ? just to check whether the RSSI will start from 100% ?
I was actually wondering during the last day about this sudden crashes, and started to think that it might have to do with failsafe...
So you helped me with your comment.
I totally agree with you about the safety issues, I will check the definitions again in Betaflight, though, as for as I remember, it is supposed to fall immediately from the sky when failsafe is active.
I will update.
If anybody can revise my blackbox log (the last one that I have uploaded, in post 11)and come up with some more insights, it will be very helpful.
I don't know anything about blackbox, up to the fact, that, when I open Blackbox explorer, I even don't see the graphs...
Thanks