ArduCopter User Group

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Discussion Forum

Problems with Ducted fan design with standard PIDs

Started by Sean Headrick. Last reply by Mike Dewhirst 5 hours ago. 36 Replies

Hi Guys,  So I have been working for a couple (few) months an this design it was a long held beleif of mine that ducted propellers would only have a detrimental effect on flight efficency. After…Continue

Custom Autopilot development - Theory through Implementation

Started by Wil Selby. Last reply by Wil Selby on Saturday. 3 Replies

I started this project wanting to learn more about the ArduCopter software that was powering my APM board and 3DR Quad-C frame. I found …Continue

Tags: equations of motion, MATLAB, autopilot, Control System, ArduCopter

GPS err in altitude vs. flying a drone at low altitute 3 mts

Started by Darius Jack Nov 23. 0 Replies

Hi,I would like to study GPS err in altitude,since Cala suggested problems flying a drone at 3 mts altitude in agriculture.Laser Developer offers Lidar technology solution.Let me know your  opinion…Continue

Motor spin slow than others

Started by Cristian Rougier. Last reply by Khoa Vu Nov 22. 19 Replies

Hello, all , im working with APM 2.5, in X configuration, when i arm the APM, one motor (motor 4) spin slow than others 3.When i calibrate the ESC's in automatic mode, all spin with same speed and…Continue

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Comment by Wayne Morris on June 22, 2013 at 11:02am

Yes, I downloaded the modified Arduino tools. I downloaded the source from the GIT. I ran the makefile. I set the file path and board type.

There are still a lot of warnings and I the only HEX file I can find is in the temp folder.

I am looking for a form thread or something to help sort it out. 

Comment by Guillaume Braibant on June 22, 2013 at 6:49am

Normally, you should not have any warning with the Arducopter code. Do you use the modified Arduino version for ArduCopter? In the first comment lines, there is a link to download the modifed Arduino version.

Comment by Wayne Morris on June 22, 2013 at 6:45am

I am trying to compile the source and need some assistance. Anyone know where I can find some assistance? I can compile but there are a lot of warnings and I am not sure about the output file.



Comment by Gonçalo Abreu on June 7, 2013 at 1:10pm

Can APM 2.5 fly a standart hexacopter with one engine failure? I mean, if it has enough power?

Comment by R. D. Starwalt on June 2, 2013 at 2:30pm

Colin, you might want to post your question in the discussion section. It is better suited for Q&A. Just click on the 'Add a Discsusion' above or go to Forum and drill down to the appropriate section.


Comment by Colin Henderson on June 2, 2013 at 1:53pm

Hi All I am having a problems taming the throttle on my hex. I'm new to the hobby so bare with me on this but while on the ground tuning if i up the throttle about a third and stop the motors continue to accelerate on there own quite a bit more in a slow build. Dropping the throttle does not immediately slow them until i,m down at 0 throttle. As you can imagine testing in flight has given me some real grief! Any ideas would be most welcome. Is the problem with the ESC's or the APM settings?

Comment by Gonçalo Abreu on May 26, 2013 at 7:28am

Funny thing happened to me yesterday. I have a fully fuctional APM 2.5 qith NEO-6M. Every mode is tested and it works. But for some reason i activate LOITER, it worked for like 10 sec, and then it shooted in a direction until i activated STAB mode again. I'm running 2.9.1b. Should i go through the logs and be worried?

Comment by sid on May 21, 2013 at 8:03pm

Hi Jani,

              Sorry , You are quite right. It was not an year ago but long back perhaps more then two years. My bad. Sorry. Time flies.

               Thanks for your prompt reply. I am looking at a stable hover with GPS and altitude hold , auto take off and landings + auto landing on fail safe  for Quad. I am comparing the same with DJI NAZA. Ofcourse the cost of NAZA is high but I am looking at the features. I saw NAZA performing well for all above requirements. I am looking at Aerial photography application. Will it perform at par with NAZA ? Does it have auto home location storage feature on power on ? Can I use the same without a computer and a modem in the field ?

I already have MediaTek GPS. Do I still need to buy one ? If I need to buy something additional for better performance , I do not mind.

Kindly guide me so I can proceed further.

Thanks n regards.



Comment by Charles lakins on May 21, 2013 at 2:00am

I think in all fairness since its very conception every release is a pre release its forever changing the numbers are just mere reference for builds some might work for some and not for others

Comment by Vikrant on May 21, 2013 at 1:31am

Randy, Thanks for the update on 3.0 release.

When is the final release trending towards? I'm just a little hesitant to try a pre-release build.


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