Bad launch auto and crash

ArduPlane
1

Hello. I use Arduplane 4.0.9.
I have a problem.
I have a point-by-point mission. Takeoff in auto mode with hands. But sometimes, during takeoff, the plane tilts very much to the side and it falls to the ground.

now I noticed these messages exactly when I had a fall.
22.06.2021 23:40:51 : Throttle disarmed
22.06.2021 23:40:36 : Triggered AUTO. GPS speed = 3.7
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Bad launch AUTO
22.06.2021 23:40:35 : Armed AUTO, xaccel = 4.0 m/s/s, waiting 0.0 sec
22.06.2021 23:40:35 : Mission: 1 Takeoff
22.06.2021 23:40:35 : EKF2 IMU0 yaw aligned to GPS velocity
22.06.2021 23:40:33 : Holding course 8571 at 17.5m/s (24.9)
22.06.2021 23:40:30 : Triggered AUTO. GPS speed = 0.2
22.06.2021 23:40:30 : Armed AUTO, xaccel = 1.4 m/s/s, waiting 0.0 sec
22.06.2021 23:40:29 : Mission: 1 Takeoff
22.06.2021 23:40:25 : Throttle armed
22.06.2021 23:39:46 : RCInput: decoding PPM
22.06.2021 23:39:12 : EKF2 IMU0 is using GPS
22.06.2021 23:39:11 : EKF2 IMU1 is using GPS
22.06.2021 23:38:50 : u-blox 1 HW: 00080000 SW: ROM CORE 3.01 (107888)
22.06.2021 23:38:48 : GPS: u-blox 1 saving config
22.06.2021 23:38:45 : EKF2 IMU1 origin set
22.06.2021 23:38:45 : EKF2 IMU0 origin set
22.06.2021 23:38:42 : EKF2 IMU0 tilt alignment complete
22.06.2021 23:38:41 : EKF2 IMU1 tilt alignment complete
22.06.2021 23:38:36 : EKF2 IMU1 initial yaw alignment complete
22.06.2021 23:38:36 : EKF2 IMU0 initial yaw alignment complete
22.06.2021 23:38:34 : GPS 1: detected as u-blox at 115200 baud
22.06.2021 23:38:34 : Ground start complete
22.06.2021 23:38:34 : Barometer 2 calibration complete
22.06.2021 23:38:34 : Barometer 1 calibration complete
22.06.2021 23:38:32 : Calibrating barometer
22.06.2021 23:38:32 : Beginning INS calibration. Do not move plane
22.06.2021 23:38:31 : Ground start

my paramsparams.param (18.8 KB)
logs - https://fex.net/ru/s/ko6rptc

2

You have high frequency vibration causing aliasing on your IMUs, but while that is bad I don’t think that is the primary cause of the problem.
You said it happens “sometimes”. Do you have a log of a successful flight with this plane?

1 Like
3

Hello. This is a log from good flight.
https://fex.net/uk/s/dmlksxe

Tks for answer.