It is the Delika Valley, in the Basque Country. You will be welcome.
This video is from the on-board camera.
The transitions tests have been OK
dear all, does anybody know what happen with my qstab landing in this videoā¦ suddenly like lost power after transition back from stab to qstabā¦
Hi Atico,
A nice smooth transitionā¦well done! We go to Italy next month and maybe some year to Spain. The Basque Country is on my ābucket listā.
Hi Musa,
Can you post the log from your flight. It will be interesting to see the level of your motor throttle settings. Also, can you post the power train setup? (Lipo pack, motor, prop)
and one again, i have test Qloiter and QRTLā¦ and for Qloiter is working fine, but QRTL just drop deathā¦ https://youtu.be/ZnDs-L-oViE , @Aticof do u switch the flight mode to RTL or QRTL? any particular setting for thisā¦
I use one RTL flight mode and Q_RTL_MODE = 1
Musa,
I would not recommend switching to QRTL unless you are farther away, higher up, coming towards you, and flying into the wind. These autonomous flight modes do not work in all situations so you need to be set up properly before activating them. The Weathervaning feature can also cause unwanted turns so this feature needs to be used with the same care and setup as an autonomous flight mode.
Before I program an autonomous flight, I will fly the path manually first and then test one autonomous action at a time. Use Grahamās video posted above to see his autonomous flight from takeoff to landing. He was about 67 meters from home before activating RTL (QRTL).
Good luck!
@GregCovey my first attempt is more than 50m from takeoff but still stallā¦ what do u think the best step by step autonomous test scenario for me at firstā¦?
- loiter (done)
- RTL (not QRTL) from > 50m?
- ā¦?
any suggestionā¦
Musa,
It has been years since I last did a fully autonomous flight so perhaps I can defer the answer to Atico or Graham. Back then, the QRTL did not work well so we used VTOL_LAND instead. The APM Wiki still seems to show that example in the QuadPlane AUTO Missions section so be sure to read this area.
I think that your test #2 is a good one. The assumption here is that you have successfully flown a complete flight using manual mode changes for transitions. I canāt remember what you have tested besides QLOITER. Also, height is your friend when testing new modes or new VTOLs.
Yes, please post the log. Whatās your voltage at the end of the flight? You may not have enough power to stop the descent. Whatās the weight of your plane?
unlucky me, it seems pixhawk not able to create log after flashing new firmwareā¦
but here is my spec:
motor :3x 3520 720kv using 1145 prop
battery : 2x 6s 60c 5000mah parallel
FC : Pixhawk 2.4.8
this is my param at the time my nimbus crash
mwa vtol last success maiden from 030219 B.param (16.7 KB)
Musa,
You will still need to get your logs working. Once working, just do a simple hover for 10 seconds in either QSTABILIZE or QLOITER modes and then be sure to disarm when done. Make sure that you have a properly formated flash card in the Pixhawk 2.4.8 and it is a good quality like SanDisk Ultra Plus. You can remove the card and read the log directly from the PC without having to wait for Mission Planner to load it.
Hi Matt,
Thanks for the link!
Greg: whats the issue with qrtl? I was success with it but only one vtol experience.
Hi cala,
When the VTOL got down to the lower level of itās final approach, Q_LAND_FINAL_ALT, usually set to 6 meters, it would drift off course and land downwind. This was in v3.8.x so I assume that has been fixed.
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Thanks. The issue that I had was that sometimes didnt recognize when landed and I had to switch to manual but I think It was fixed in latest fw.
I was so sick of winter today that I went out and flew my plane with floats off the snow. It was incredible fun and the low wind made it even more enjoyable. One more month and I can dust off my VTOLs. 
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You are sending the winter here 
. lol
i have read the log directly from sdcard, but i only found my old logā¦ none of new log was foundā¦
BTW from my last succeed maiden flight i have some changes,
- change my radio from sbus to CRSF protocol
- change my ESC from Xrotor 40a to ZTW spider 60A OPTO
- some minor change in WP param
personally i have suspicious my 60A ESC is the problemā¦ what do u think guysā¦?
Those are very small props! Some here are using 14x8ās on the front and 17x5 on the rear. Also some are using a larger motor on the rear.
I see in both your crashes the plane was moving backwards quickly which seems to imply the rear motor at least does not have enough power? Note: your hover power should be at least 700-800W.