So...I've had a couple not-so-fun instances with both an APM 2.6 and a Pixhawk where it seems to invert the horizon and crater dramatically into the ground at full throttle. I've attached the log from the Pixhawk flight. I have a sneaking suspicion that bad vibes are the culprit (had a minor mishap that may have created an unbalanced prop situation), but it doesn't completely make sense that it would cause this response.

The APM flight happened a couple years back and demolished everything...well not everything I had a couple screws left. That one was interesting. I flew in manual and loiter modes for about 45 minutes before deciding to set up a mission. Took off in loiter mode, flipped to auto, it took off away from the waypoint, slowly flipped until it was facing straight down and spooled up the motors to full throttle until it hit the ground doing Mach 10. Pretty sure it may have hit the speed of light as some parts vaporized or were transported to another dimension. This doesn't really help without the flight logs, but thought it would be interesting, especially in light of recent Solo mishaps. We have come a long ways, but gravity seems to win a lot of the time...or really the sudden lack of motion.

2015-06-29 17-51-50.log

You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –

Replies

  • It's interesting you mention this. I saw very similar behavior from my own quad recently. It went fully inverted, and maintained throttle into a tree and then the ground. Just like in your situation, I've never had any issues in any mode other than auto. Here's my thread: http://diydrones.com/forum/topics/front-flip-while-mapping-crash

    Fortunately I was able to get the quad flying again, but I'm more concerned about things like this happening in the future...

    • It sounds like you suspect a nasty bug related to recovery from inverted flight.

      *if you can do 100% safely* :

      - remove props, maybe even run it of a lower voltage , hold it  in hand, in stabilize mode (or the one related to accident) - then invert it perfectly once it's "flying" , and see how it responds.   - you will see RCOU logs indicate watch motors are at idle, and high throttle.

      you expect to see some motors work on high RPM, while others to idle.

      Remember to do this only if there is no risk of getting hurt.

      • I'll try this today and get back. I've tested each individual motor and ESC and all appears to working properly so we can rule out an ESC cutting out.

  • sorry - too little data in that short log to say anything about what happened.

This reply was deleted.

Activity

DIY Drones via Twitter
RT @chr1sa: After more than a year of only virtual races, @DIYRobocars returns to the newly renovated @circuitlaunch on May 22 for the resu…
23 hours ago
DIY Robocars via Twitter
RT @DAVGtech: And now available with LiDAR 🔥 https://twitter.com/Heavy02011/status/1381137016381964293
23 hours ago
DIY Robocars via Twitter
RT @Heavy02011: #VirtualRaceLeague: @DIYRobocars Race #9 - #ParkingLotNerds #thunderhillracetrack, CA Join us for the next race April 24th,…
23 hours ago
DIY Robocars via Twitter
RT @DWalmroth: Weather's finally cooperating, looking forward to racing 1:10 scale autonomous cars outdoors again! @diyrobocars, @NVIDIAEm…
Wednesday
DIY Robocars via Twitter
RT @AIDRI_: I finally succeeded in optimizing the trajectory and speed of a car on a #racetrack. Next step: implement a 2d controller and…
Wednesday
DIY Robocars via Twitter
@jetdillo @circuitlaunch Actually the second *in person* event in a year. We do virtual races every month
Apr 2
DIY Robocars via Twitter
Update: we're moving it back one day to Sunday (the 4th) at 11:00am instead
Apr 2
DIY Robocars via Twitter
@GrantEMoe @circuitlaunch Update: we're doing it on Sunday (4th) at 11:00am instead
Apr 2
Laurie J. Troy liked Jasper Kueppers's profile
Apr 1
DIY Robocars via Twitter
RT @chr1sa: Maybe we should have a mini @DIYRobocars race in our lower school's playground https://t.co/xLFeua1R6X
Mar 29
DIY Robocars via Twitter
If anybody wants to join us for an informal outdoors hack/race we're going to be meeting at the @CircuitLaunch park… https://twitter.com/i/web/status/1375907409223249923
Mar 27
DIY Robocars via Twitter
RT @SmallpixelCar: Ready to reopen, innovation has to continue. Inside/outside, LiDAR/GPS, race/delivery https://t.co/jpmvttoHEd
Mar 26
DIY Drones via Twitter
RT @DAVGtech: By far best race yet! Congratulations to the winner @Heavy02011 🥇🏆🍾👏👏👏 @diyrobocars @donkey_car @NVIDIAEmbedded https://t.co/…
Mar 20
DIY Robocars via Twitter
RT @Heavy02011: #VirtualRaceLeague: @DIYRobocars Race #8 - #ParkingLotNerds ⁦@DAVGtech⁩ ⁦@DWalmroth⁩ ⁦@OttawaAVGroup⁩ - join us tomorrow h…
Mar 20
DIY Drones via Twitter
RT @mrpollo: 11 years ago, the pxIMU was announced to the world on @DIYDrones, and it changed the life of many (mine included). The followi…
Mar 18
DIY Drones via Twitter
RT @ishcahealth: This is awesome! ☘️ @DroneDJ @DIYDrones @WorkerDrones @DroneMedia_UK @dublinaviation https://twitter.com/media_ireland/status/1372077878536462336
Mar 18
More…