@Wieland, check my answer here:
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Parrot disco Arduplane arming and flying help can't get it to spin
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Parrot Disco arduplane gamepad joystick control help
@kikislater, thank you for your answer. Really hope the development of ardupilot using the SC2 will progress smoothly!
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LW20/C Laser altimeter
Yeah, after further testing, I found that Select Interface mode still causes the power issue sometimes. Also, I found that the ferrite bead does not work for all lidars. Right now, the best way to get around this is by supplying the lidar with a separate 5V power source from a UBEC or something.
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Q_assist_speed and tiltrotors
Hello all, I have a question about tiltrotor behavior.
I’m working on a custom-designed aircraft of a small size and fairly high wing loading. It’s a Quadplane configuration with the front two motors tilting on a normal servo, and the rear two stationary. I haven’t flown it yet, but based on my knowledge of RC aircraft, I suspect it’s going to have a relatively high stall speed. What I want to know is this:
How do tiltrotor aircraft handle Q_Assist_Speed and Q_Assist_Angle?
Obviously, the back two motors would be able to assist easily. But what happens with the front two? If I set a Q_assist_speed or _angle, will those motors do anything? Will it partially tilt them to get assist while maintaining forward speed? If so, how does it determine what angle to tilt to? I’ve read through the Ardupilot.org documentation on quadplanes thoroughly, but I can’t find any reference to how tiltrotors behave with these parameters.
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Q_assist_speed and tiltrotors
Works properly since 3.9.2beta2, see:
Rolf
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Q_assist_speed and tiltrotors
Thank you for the quick response! So, what I’m gathering from your video is this: Q_assist_speed on a tiltorotor works more as a “safety net” than an actual “assist”: Upon dropping below the speed threshold, it tilts the motors and essentially does a full transition while maintaining FBWA controls: throttle is forward, not up. Applying more throttle causes the aircraft to transition back into forward flight.
I do have a follow-up question: Is it possible to have an in-between scenario? As in, would it be possible to maintain forward flight at a speed below the aircraft stall speed. To only tilt the motors part of the way, so the thrust has both a forward and an upward component.
Correct me if I’m misunderstanding something here. This is my first experience with vtol of any kind, so I’d like to figure this sort of thing out BEFORE I flip that flight mode switch rather than after.
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5/7 inch Source One with Cube on mini carrier
Hi,ive built a 5/7 inch quad with a pixhawk cube 2,1 on a mini cattier board,this has been a fun project and it has all the autonomous function’s plus can do missions,next step is to fit the benewake lidar.
I would like to thank IAMMATT and wicked1 for there input in there respective threads on here,also A very big thank you to Ben and Ian at 3DXR in the uk who’s knowledge and service is the best in the business thank you all.
Any questions just ask.
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CanberraUAV Outback Challenge 2018 Debrief
"The avoidance system we developed for ArduPilot has been built over several months and is easily the biggest advance in ArduPilot that has come out of this year’s competition. The 2016 competition pushed us to add fixed wing VTOL support to ArduPilot, and this year the competition once again pushed us to develop ArduPilot in new and useful ways. We were delighted to see it performing so well in a test over long distances, with the Porter dodging all the aircraft, birds and weather systems that the organiser’s DNFZ generator threw at us. "
[…]
… “The only way we could think of to allow the search to proceed was to establish an alternative link between the Pixhawk and the RaspberryPi. The serial cable wasn’t working, so using mavproxy commands over an ssh link into the RaspberryPi we added a rather complex route for the packets. We told mavproxy on the RaspberryPi to listen on UDP port 14550, then we told mavproxy on my GCS laptop to redirect packets that it received from the Porter over the RFD900x link to the RaspberryPi by way of a VPN running on my home network back in Canberra. In this way the RaspberryPi could get telemetry from the Pixhawk, travelling over 2000 km via Canberra instead of the usual 20 centimetres of the serial cable.” …
[…]
"We wondered if we could identify where the hatch was lost from the onboard log, and perhaps even find the hatch. Peter and I looked carefully at the EKF barometer innovations in the log and found one particularly suspicious event. […] Armed with that information we modified the image matching code “geosearch” that we use for offline matching of targets to look for a target with the right dimensions of the hatch and disabled the “red and blue” scoring system that we used for the 2018 target, instead using our generic “unusual object” scoring system from the 2016 challenge. […] During the lunch break we got permission from the organisers to undergo a ground search for the hatch as the location was close to a small farm road to the south of the runway. When we arrived Jimmy immediately spotted the hatch close to the location where geosearch had indicated and we were able to bring the hatch home.
Epic!
Congrats, also big kudos to Monash UAS for overall first place, and second place team Dhaksha with their hybrid Hex, just one point behind. What an overall achievement for Ardupilot!
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PreArm: check steering and throttle config error
The best thing would be to upload a dataflash log, so someone more knowlegdeable than me can have a look.
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Q_assist_speed and tiltrotors
I have not tried it yet, but it should be possible
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Q_assist_speed and tiltrotors
If you do attempt it, I’d like to hear the results. It will probably take me a few weeks to get my own build flying well enough to try it.
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Seagull #Rec and camera trigger
Dunno why, but it works just fine this morning on rc12. One more question, I’d like to be able to trigger video recording as well at 1800. Is it best to do that with a do set servo command? The camera trigger seems to be 2 position.
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Skid Steer Mower Overshooting pivot turns
Doug: You can have more than one GPS. The way I understand it, Ardurover will use whichever has the best position info. So, if you have an RTK fix or float status, that will be used over a standard 3Dfix. But, I am only using the ublox rtk. I figure that to do a decent job, I have to have RTK fix, so I would never want to use a lower GPS reading anyway.
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Log database utility
I normally use a github issue or gitter to discuss these kinds of things but they’re not very structured. Happy see whatever you have in your mind 
Love your Ardupilog - I could see something similar in a high level python module onto eg. an influxdb backend with a predefined schema. That would be fab.
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Skid Steer Mower Overshooting pivot turns
Doug and Vince: Congratulations on getting your mowers working so well! Awesome videos! You guys have a real challenge to get your navigation good enough that a 30" or less deck can do the job. I have a 72" deck so I am able to overlap a good bit to “cover up” a lot of navigation woes. I think your navigation looks pretty good. If ya’ll are interested in automatically generating waypoints for an outside-in mowing pattern, I wrote a program that will do that.
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KevinG's Autonomous zero-point turn Lawn Mower
Yes, you can tune away while in auto on a mission.
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5/7 inch Source One with Cube on mini carrier
Just for fun? Or are you going to put it to work? I’m curious how easy it is to get the benewake unit working. Which model are you going to try?
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3 compasses installed - problems starting compass calibration, enumeration - missing docs - Help please!
disable the internal one, EKF will only use two first (external) anyway.
-make sure the orientation is correct for them.
if you are unable to calibrate them at the same time, it is most likely related to this:
Even if you calibrate them one at a time, they should work fine, just keep track on which calibration data belong to which…
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Features available in ArduPlane on an Omnibus F4 Pro v3 ...?
Thanks Nando & wfk94025 for that information … 
Now I can confidently proceed with the installation of the Omnibus Pro F4 v3 FC knowing that all the features of ArduPlane are available.
Cheers …
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Indoor flight with external navigation data
@chobitsfan, can you please share with me the parameter list you used for flying skyviper with motion capture data?
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