Thanks so much for the assistance with this! - All of the notes and Ideas were/are great! And led to a lot of terrific conversations and troubleshooting.
I think that we eventually solved the issue today.
After a great deal of discussion and research, we found that this issue actually "survived" an overhaul, which led us to rule out a lot of things. We realized eventually that the incorrect counterweights may have been installed on on the propeller, which meant there was not enough force to move the blades back using the counterweights
The counterweights we put on this week were approx 1lb 5oz vs 1lb 0oz. So that 5 ounce difference, spinning very fast, seems to have made the impact. Note that the arms on my 2D30 are 15 degrees.
Today was able to do a power off stall as well as slow flight without entering the failure condition for the first time. Excited to try more flight testing to verify its fixed but I am optimistic we are there.
HUGE thank you to the amazing Dick at NW Prop, and Brian at NW Seaplanes [cannot recommend these guys enough] for helping troubleshoot through it.
I also learned that the "Original" 2D30 bearings may be better than the replacement parts. Please let me know if you have a set or know where to find these [other than the Pensacola Air museum!] as I want to hunt down a set.
I hope to keep running 2 blade propellers on this seaplane for a long time and can't thank enough the valuable knowledge that's here on this forum and also around our community.
