All of my conclusions were based on actual model tests.

In some cases it is difficult to apply full scale aerodynamics. As one reply already stated, we are operating in such a low Reynolds number area we are essentially off the chart. This is the reason the large models fly better, and also the reason the TOC type competitors fly as large a model as allowed. They just fly better.

As for the wing tips, try several of the different types and note the results for landing speed, stalls, spins, roll rate and others you can think of. I think you'll find the end plates give a higher roll rate and a lower landing speed.

I published this same data in my R/C Report magazine column, "Fun Aerobatics," and two modelers tried experiments with plates and sent me the results. Both agreed on a higher roll rate and a slower landing speed.