Hi all. I am trying to get a quad running - I had my first flight today, but it didn't go so well. It was very wobbly, wanted to spin, and mainly was unflyable (especially after It crashed). All I was applying was throttle (to get it to rise).
I got a few questions regarding my setup:
Is a 4 ch transmitter sufficient or should I get one w/ more channels? I setup all the flight modes to stabilize, which seemed the most prudent.
I am using 750KV motors with the hobbyking SS 18-20 ESCs, and a 2100mAH lipo to power everything.
the ardupilot w/ oilpan is programmed using 2.0.38, and everything seemed to be setup right -the props are in the right directions, I did configure the frame (+), and leveled the sensors.
I build a frame out of U channel aluminum , with the electronics mounted on the center, battery on the bottom - I am not sure if the frame is contributing to the problems or not, but would you recommend getting something like the arducopter frame from jdrones?
Just trying to figure out what is the best way to get to something that will actually fly :)
Thanks for your input
Replies
I've had decent luck with HK ESC's, but they were never able to keep rock-solid control over my quads. The HK ESC's that I was using did not have timing adjustment, which I found necessary to get my motors responsive enough for the level of stability that I wanted to achieve. After rounding up some 40A Plush controllers and switching them to mid-timing for my motors of choice, life is good.
Another killer I've faced is vibration (cliche'?) You MUST ensure that your props are balanced and isolate the APM as best you can. Keep wires loose ... and don't use channel stock for a frame... :) Try the Al. towel rods from Home Depot. Those will not torsion.
Of course, posting a video will help immensely!
You could degree P and D in Stable mode.
And then test again.