Spitfire76

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Everything posted by Spitfire76

  1. Transmitters for use with RC models have the joy sticks set for one of 4 modes as follows: The throttle should not center itself. Mode 2 is typically what we use in the US and I believe mode 1 is used in Europe. These transmitters have been used for planes so you have to translate the controls as follows. Throttle - increases RPM of all motors so controls altitude. Low throttle is when the stick is down. Rudder - rotates the UAV, left turns it anti-clockwise and right clockwise. Elevator - controls pitch, stick up to go forward, stick down to go backward Aileron - controls roll, stick left turn left, stick right turn right
  2. I thought this article was interesting on the choice of drones for precision agriculture. http://bestdroneforthejob.com/drones-for-work/agriculture-drone-buyers-guide/ The choice of using a fixed wing drone over a multi-rotor makes sense as they need less power providing longer flight times and typically there is no need to hover but rather to keep moving taking pictures of the ground.
  3. I performed a quick bench test and found that I could change the flight mode to RTL using the MP action tab. With the props removed I armed the quad and increased the throttle to simulate it was in the air. I then clicked on the "Do Action" to initiate the RTL. I answered yes to "Are you sure want to RETURN_TO_LAUNCH" and the status in the artificial horizon changed from "stabilize" to "RTL". Also the motor RPMs increased and I had no longer control on my transmitter so it must be working. The version of ArduCopter is 3.2.1 and the mission planner version is 1.3.34.
  4. I have built a quadcopter using an APM 2.6 for the flight controller. It was not an original 3DR board but a clone that I purchased on Amazon for around $40. Actually the APM board has been retired for use with ArduCopter software as there is insufficient memory to load the later versions. The last version that can fit on the board is 3.2.1 but this has worked fine for me. The Pixhawk is the board you need to load the later versions. You can see my complete build in the DIY section of this forum.
  5. I have an APM board on my UAV which as you may know is the predecessor to the Pixhawk and runs the same software. I've setup a 3 position switch on my Tarranis XD9 transmitter for the 3 flight modes: stabilize, loiter and RTL which allows me to change flight modes in the air. I also have 915 mhz telemetry connecting my laptop running mission planner to the APM flight controller but I have not tried to change flight modes using the action tab but its something that I could try.
  6. Spitfire76

    My UAV Build

    Alan, Its actually a rebuild of a Kickstarter project (Fourbot) that I backed a few years ago. I ended up with a bunch of cheap components, no build instructions and very little support from the project creator. With a lot of googling and help from other backers I got it built and in the air but was unhappy with the poor quality of parts so I have been gradually replacing them. From the list above the motors and ESCs are still from the original kickstarter project everything else as been replaced or added. Although that KS project was poorly managed I have no regrets backing it as it got me hooked on this technology and I have learnt a lot rebuilding it. My plan now is to build a more professional type of UAV, most likely a 600-700mm hex with retractable landing gear, 3 axis gimbal, 3DR pixhawk controller etc... Cheers - Richard
  7. Spitfire76

    My UAV Build

    Frame - S500 (HK) Flight Controller - APM 2.6 + GPS and external compass (3DR clone from Amazon) FC anti-vibration mount (Amazon) 915 Mhz Telemetry ground and air modules (3DR clones from Amazon) ESCs - Turnigy Multistar 20A (HK) updated with simonk firmware Motors - Turnigy D2830/11 1000KV Power distribution board - HK Receiver - Frsky X8R from (Aloft Hobbies) Transmitter - FrSky Taranis X9D (Aloft Hobbies) updated with OpenTX 2.x firmware. Propellers - Turnigy Slow Flyer 10x4.5 (HK) Battery - Turnigy 3 cell, 20-30C, 2200mAh LiPo (HK) Battery charger - IMAX B6AC Version 2 by SKYRC (Amazon) Battery level sensor alarm (HK) Tarot 2 axis gimbal and controller for a Mobius camera (HK) Camera (Mobius Actioncam) HK - Hobbyking Testing of the autonomous return to home feature.
  8. I am Richard, a keen UAV hobbyist from Northern California flying a home built UAV. I’ll add details of the build to the DIY section of this forum.