Hello Folks,

 Can't do back flips. The quad over shoots and makes that weird prop noise. I belief I'm not dialing in the correct settings. Or the ESC is a dud, but this is the 2nd ESC and it's doing the same thing as the first. 
I looked at the BB log and see that the blue line on the graph does not make a nice square as my other quads do when I look at their graphs. What can I do to dial in the settings to make the quad do backflips.  Attached is the BB file. Hope someone can help before I have to send everything back to China. Thank you.


# diff all
# version
# Betaflight / STM32F7X2 (S7X2) 4.2.9 Apr 27 2021 / 19:34:29 (e097f4ab7) MSP
API: 1.43
# config: manufacturer_id: DIAT, board_name: MAMBAF722_I2C, version:
ec268d11, date: 2021-07-26T13:10:45Z
# start the command batch
batch start
# reset configuration to default settings
defaults nosave
board_name MAMBAF722_I2C
manufacturer_id DIAT
mcu_id 001d00394638501120383937
signature
# name: HD1 w/ Vanny arm
# resources
resource MOTOR 1 A09
resource MOTOR 2 A08
resource MOTOR 3 C09
resource MOTOR 4 C08
# beacon
beacon RX_LOST
beacon RX_SET
# serial
serial 0 1 115200 57600 0 115200
serial 1 64 115200 57600 0 115200
serial 3 0 115200 57600 0 115200
# aux
aux 0 0 0 1300 1700 0 0
aux 1 1 3 1300 1700 0 0
aux 2 2 3 1700 2100 0 0
aux 3 13 1 1300 1700 0 0
aux 4 35 2 1300 1700 0 0
# master
set gyro_lowpass2_hz = 500
set dyn_notch_q = 250
set dyn_notch_min_hz = 90
set dyn_notch_max_hz = 350
set dyn_lpf_gyro_min_hz = 400
set dyn_lpf_gyro_max_hz = 1000
set acc_calibration = -78,-26,-21,1
set mag_hardware = NONE
set dshot_idle_value = 300
set dshot_bidir = ON
set beeper_dshot_beacon_tone = 3
set yaw_motors_reversed = ON
set small_angle = 180
set pid_process_denom = 2
set debug_mode = GYRO_SCALED
set gyro_1_align_yaw = 1800
set name = HD1 w/ Vanny arm
profile 0
# profile 0
set dyn_lpf_dterm_min_hz = 126
set dyn_lpf_dterm_max_hz = 306
set dterm_lowpass2_hz = 270
set vbat_pid_gain = ON
set feedforward_transition = 5
set iterm_relax_cutoff = 10
set yaw_lowpass_hz = 100
set p_pitch = 55
set d_pitch = 35
set f_pitch = 143
set p_roll = 50
set d_roll = 32
set f_roll = 135
set p_yaw = 54
set f_yaw = 135
set d_min_roll = 0
set d_min_pitch = 0
set idle_min_rpm = 15
profile 1
profile 2
# restore original profile selection
profile 0
rateprofile 0
# rateprofile 0
set roll_rc_rate = 155
set pitch_rc_rate = 155
set roll_expo = 20
set pitch_expo = 20
set yaw_expo = 20
set roll_srate = 69
set pitch_srate = 69
rateprofile 1
rateprofile 2
rateprofile 3
rateprofile 4
rateprofile 5
# restore original rateprofile selection
rateprofile 0
# save configuration
save

A video I think would be very helpful.

(20-Nov-2021, 05:21 PM)the.ronin Wrote: A video I think would be very helpful.

Hello Ronin, 
Thank you for the reply. I've uploaded the video to youtube. I'm not sure about uploading video here as I don't know if we can. the video is short bout 30' 

https://youtu.be/1qkoOPAGeTo

Thank you

I'm not sure I see (or hear) what the problem is. That motor noise is normal when doing flips or rolls - admittedly some of those flips do sound different but not really alarmingly different. As for the overshoot I saw one time where it looked like you might have over-rotated resulting in more forward pitch making the quad shoot out. Your PIDs also look reasonable (5S I assume based on your D's) as well as the P/D relationship.

If I was forced to highlight something then it might be your feed forwards at 143/135 - you could just try zero'ing that out but honestly even 145/135 is perfectly reasonable. I'll run 200 if the blackbox traces say there's room.

Did your flips feel and sound different on other quads? Did you keep the same rates?