Throw launch

PX4 Autopilot
1

hey, there
i am having some problems with throw mode in px4
these are some logs
i tried throw mode
these are the logs i received in QGC

[15:41:24.947] Info: Armed by RC (switch)
[15:41:24.951] Info: logging: opening log file sess112/log112.ulg
[15:41:24.962] Critical: Ready for throw launch
[15:41:24.966] Info: Disarmed by lockdown
[15:41:24.999] Critical: Disarmed, don't throw
[15:42:05.770] Info: Manual control lost

i am arming the motors , but as soon as i try to throw , motors are disarming automatically , i have also turned off fail-safes in QGC app.
please let me know what other information i can provide

2

A flight log, from boot Flight Reporting | PX4 Guide (main)

3

This is probably ARM_DISARM_REASON_LOCKDOWN - but I don’t know what causes this. Might be GPS loss or similar. Would be good to have full log before I try find someone who knows what this means.

4

hey @hamishwillee
got stuck up with some emergency so couldn’t reply
these are the logs https://review.px4.io/plot_app?log=3aecb685-83e5-4c68-a1fe-16f4c7c1295c
one more thing , i am able to simulate throw mode px4 sitl - gazebo but not in real flight trial so i compared logs and system differences with sitl and my physical drone , and the only difference i can see is GPS , i am not using GPS module but in simulation there is GPS module present
so is this really because of GPS motors are not arming ??
if yes , so out of curiosity someday i want to do it without GPS also , could you help me with that or please guide me towards that
thank you

5

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