I did a small test mission last weekend and found the GPS navigation accuracy was quite poor. I've attached a screenshot showing the actual path taken compared to the WP path it should have followed from WPs 2 to 9. The speed was set to 5 or 6 m/s.
I've got a Cyclops EPO that I'm setting up with a view to attempting a 200km flight (lovely plane, I'm sure it's capable of it), but I've crashed it twice out of three outings, and I've got no idea what's going wrong.
If I set THR_FAILSAFE to 1 and switch off my transmitter, then the APM goes to CIRCLE mode after 1.5 s and to RTL mode after 20s. It does that if short and long FS are enabled. But it also does that if they are both disabled.
I've been testing the effect of different cruise airspeed settings on power consumption, but in the range that I've been testing (8m/s, 9m/s and 10m/s) it has almost no effect on actual airspeed (or power consumption).
I'm building a Bormatec Maja. Like many UAVs it's a pusher with the motor at the back and I want to put the battery right at the front for balance. I Googled for some ready made battery extension leads and didn't find any. But I did find this discuss