Posted by Ahmed Rehan on October 12, 2014 at 2:24am
ArduPlane 3.1.1 not working proper on flying wing any body else facing problem as soon as switch on to fbwb or auto mode it nose dive and roll on one side.
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Are you using the Airspeed sensor. If yes, and it is "enabled" make sure it is reading airspeed, had this issue with my FX-79, found my airspeed sensor was not reading, and was enabled, and in every Auto mode, it thought it was stalling, so it dove to gain airspeed. Also, I just had a crash this saturday that involved "min airspeed" beign set FAR too low, my fault I know, but this created a situation where the airspeed was a bit too low, and turning from down wind to an up wind situation, the aircraft tip stalled into a irrcoverable spin dive. Out of curiousity, which airframe are you flying?
Ahmed Rehan > Nathan Douglas LindemanOctober 16, 2014 at 2:20pm
Jeff what is your RTL altitude?
Ahmed Rehan > Nathan Douglas LindemanOctober 12, 2014 at 11:53pm
I am not using airspeed sensor and it is disabled min air speed is well above stall speed. Airframe is custom cnc cut 3 part flying wing 2M span will post photos later.
Adam Kroll > Ahmed RehanOctober 13, 2014 at 12:38am
Its 99.99% likely that Tridges recommendations will solve your problem.
I recently bought pixhawk and the last firmware version I used until recently was 2.67, since then a new method of elevon mixing had been introduced, which had me stumped for a day until I found this page
Make sure to read it carefully in particular the chapter - New style elevon mixing EEPROM setup (ELEVON_OUTPUT option)
Ahmed Rehan > Adam KrollOctober 13, 2014 at 7:31am
yes i already checked this and tested using elevon_output option in manual mode it is ok. i will do next flight after recalibration and will update.
Ahmed Rehan > Ahmed RehanOctober 14, 2014 at 4:33am
Thanks to every body specially Tridge / Gary
Just Tested with new calibration worked perfect tuned with auto tune. tested FBW_A and auto mode also worked perfect. The P gains were too low as default . will test auto takeoff and land and will update.
Ahmed
Ahmed Rehan > Ahmed RehanOctober 15, 2014 at 6:04am
Today Auto takeoff worked perfect will try auto landing in next flight any suggestions on approach of autolanding height and distances.
I also am having this problem that you have now corrected. I am flying a Hercules wing on 4S, twin engine. The last two flights when I enabled RTL my plane ended up in a steep dive, both times I regained control. I am using the new digital airspeed sensor. My main question is, if I was flying at less then my cruise airspeed of 17 m/s when I engaged RTL, would the plane drop altitude to gain speed. Thanks for your help JEFF
Replies
Are you using the Airspeed sensor. If yes, and it is "enabled" make sure it is reading airspeed, had this issue with my FX-79, found my airspeed sensor was not reading, and was enabled, and in every Auto mode, it thought it was stalling, so it dove to gain airspeed. Also, I just had a crash this saturday that involved "min airspeed" beign set FAR too low, my fault I know, but this created a situation where the airspeed was a bit too low, and turning from down wind to an up wind situation, the aircraft tip stalled into a irrcoverable spin dive. Out of curiousity, which airframe are you flying?
Its 99.99% likely that Tridges recommendations will solve your problem.
I recently bought pixhawk and the last firmware version I used until recently was 2.67, since then a new method of elevon mixing had been introduced, which had me stumped for a day until I found this page
http://plane.ardupilot.com/wiki/arduplane-setup/first-time-apm-setu...
Make sure to read it carefully in particular the chapter - New style elevon mixing EEPROM setup (ELEVON_OUTPUT option)
yes i already checked this and tested using elevon_output option in manual mode it is ok. i will do next flight after recalibration and will update.
Thanks to every body specially Tridge / Gary
Just Tested with new calibration worked perfect tuned with auto tune. tested FBW_A and auto mode also worked perfect. The P gains were too low as default . will test auto takeoff and land and will update.
Ahmed
Today Auto takeoff worked perfect will try auto landing in next flight any suggestions on approach of autolanding height and distances.
Ahmed, Tridge has responded, it is a setup problem please undertake the steps he has advised.
Gary / Tridge one thing i cant understand it flew one mission with the same setting ok navigating all waypoints and then started orbiting over head.