I took the quad for a spin yesterday and figured out 4 things:
- It flew, quite good. Very stable, video quality was good and the signal was very strong even 4-500 meters away
- I crashed a few times. See video here: https://www.youtube.com/watch?v=AjwiUQltHaE&feature=youtu.be
- Flight time was around 20-25 min with a 3000mAh Multistar LiHV battery. Average amps for hover was around 6-7 which is great. AUW around 630g
- Eventually it flew away in a near-by forest and I couldn’t find it. The reason was a sudden loss of signal which triggered the fail safe routine. The quad started climbing to 50m, went home and then dropped to 5m. Problem was that ‘home’ was a few hundred meters into the near-by forest due GPS interference from the camera….
So it’s gone, have to build another one.
The lesson here is that I have some software issues to iron out and that I really need another signal path for the control. I plan to use a rfm22b for this.
The material loss is not that huge – a raspberry pi, 4 rctimer 1806 motors, a brand new battery and a Navio board. A total of 250 euros plus about 2 weeks of work to print all the pieces, etc.
So the next one will need to fix these issues:
- Rock solid RC link for control
- Solid software without glitches. My GS crashed once in mid-flight (see video) due to the h264 decoder
- More portable GS. A laptop with 2 wifi cards, a ps4 controller and many wires is not a fun way to go to the field and fly
- The raspicam interferes with the GPSsomething fierce. Even after copper shielding the H Acc went from 2m to 50m after starting the camera…