ORIGINAL: PeterP
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</div><div>I would be interested to hear what the designers motivation is for using a flying stab. I played around with flying stabs in the eighties but never had much success. From what I remember it was difficult to get the model trimmed for level flight. I was always chasing the trim and in the end I just reverted back to a normal stab. I guess that the servos are much better these days therefore that may solve that issue. Great looking model!</div>
I believe most of the efforts with flying stabs I've oberved have had their pivot points too far aft. The forces will tend to diverge control under this condition.The pivotshould be located just fore of the stab's AC or on the AC, and the stab should be statically balanced (will require more weight to be added than if the pivot was located aft). A set of ball bearings might help but not absolutely necessary. Lastly, I believe that the control linkage should be added as far fore as practical.
Looking carefully at BJ Park's stab shape, the guy seems aware of what he needed to do to make this practical. The guy is a thinker....my hat's off