Well, after a long delay I finally finished my Freeman rebuild. I have done several short test flights. I am pleased to report no crashes… I’d like to move forward with a Qautotune but I have a few concerns. The first one is stability. The plane flies ok in QStablize, QHover and Q loiter. So I started a QTUNE on the pitch axis. The first move was a significant yaw to the left, which surprised me. I let the tune continue for a few more minutes and didn’t like the way the airplane was responding so I abandoned the the tune and landed uneventfully. The parameters are set to comply with the tuning guide or as recommended in the QAUTOTUNE - VTOL autotune for quadplanes.
The second concern is amperage draw during the tune. In a hover with gently maneuvering, amperage is about 50 amps. During the tune you can see spikes to 150 amps. I am using a 200 AMP Mauch Power module and 60 amp ESCs so theoretically it should be fine. But the battery, XT90 connector and 10GA wire getting are warmer than I’d like. It’s not hot to the touch but definitely north of warm. To mitigate high amperage I am thinking about setting the current limit to 100 - 125 amps. What are the implications of setting a current limit.
Below, please find a link to the log from the tuning flight. You’ll see three flights; two quick test flights and an attempt at a tune.
Love to here if others did a QTUNE and the results.
Thanks,
Dave