If the wires are soldered directly check that they haven’t fractured where the solder stops wicking up the strands. That is a likely point of failure and why wires soldered to a PCB should be supported past that point.
In the meantime I did check the connections again, doing everything I could to provoke a servo failure. I moved the ailerons for about 10mins straight, while doing that I pulled on all the solder points (on the board as well as the Y-connection). Not a single glitch in aileron movement.
I also checked for the servos getting unusually hot, keeping my finger on them to prevent cooling (I didn’t mention yet the incident occured on a very hot day). No failures.
Still, I’m now going with the theory of intermittent servo failure as the only possible explanation. A fellow RC pilot also told me had this happen with cheap stock servos more than once: Stuck in a fixed position for a limited amount of time. He then started to always replace them with quality servos before the first flight, and so will I.
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I don’t get that reaction, but my plane wants to fly away on RTL. The RTL response is very different each time I try it. I keep thinking I should let it fly a little to see if it will circle and come back but I just switch back to manual and fly back. I’m confused I thought if I switch to RTL the plane would turn and return to launch point and circle.
please start a new post, this is a thread about a servo failure, not the details of RTL mode.
I’m reviving this here although I hope the new incident is unrelated to the original one. In the meantime, I swapped stock servos on all my planes, just to be sure it never happens again. I’m now doing test flights with the planes. Two already passed without issue. Yet today I had another roll-related incident, and although it’s probably unrelated, I’m getting a bit nervous at the moment every time uncommanded roll movements occur…
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The plane just tipped to the right a few seconds before touchdown and landed on the right wing (which became detached). It might have been just a stall, as I had just cut throttle and airspeed was quite low. Although I wouldn’t have expected a plane to roll in this case (flying straight). As for weight distribution, if anything I would have expected the plane to tip to the left, as there is some extra load (receiver, antennas) on the left wing.
I’ve been flying this plane for 3 years and it never did that before, so in the light of the original roll incident, I’d really like to get to the bottom of this.