Hi, I bought these very cheap hobbyking rectangular carbon tubes. I made this not so serious experiment with them as they could potentially be great to build your own multicopter frames. Tridge, by the way, used those recently in his quadplane build he posted about on diydrones.
And, this is a not so serious contribution to coming Easter…Continue
This video shows how to use an AirbotPower board to build an Octocopter (a large 1m diameter X8 coaxial config in this example) and what are its functionality.