I'd love to see video of your flights. We're using that in addition to flight data to analyse behavior on repeated viewings.
Today we made good progress using the planes with wings fixed permanently at 4mm incidence. Flights are consistently between 1'25" and 1'30" with only a rudder change, from the time the motor is just broken in until the motor is worn out and breaks. Initial climb to the right is still too violent but the plane stays nicely on course every single time so we accepted that pending tests next week with the moveable wing design.
We were able to get four flights in a row, two by me and two by Luke, using contest rules. We used the same motor and same-ish winds and torque, around 3600 turns.
Me, 1'28" right and 1'27" left:
https://www.youtube.com/watch?v=a-kf8k2 ... e=youtu.be
Luke, 1'30" right with one ceiling hit and 1'25" left:
https://www.youtube.com/watch?v=rgVqyn2 ... e=youtu.be
The first launch is well within that 3 minute initial period in the rules and both launches are well within the 8 second period. Only the rudder was changed between flights. We were very happy with the consistent turns, the few knots remaining at the end of each flight, the consistent times within 5 seconds going both ways, and the nice recovery from the one ceiling hit. Hopefully the moveable wing version will climb more gently to the right.
We did play around with other props, rudder settings and motor lengths after the videos and while none of those later flights was less than 1'15", none were over 1'25", so I think today's videos are where we're at until new ideas pan out. The big things we plan to try next Sunday are the adjustable wings which will hopefully reign in the initial climb to the right, and the larger bladed prop to extend the motor run.