Barryb,

The differences in th TB 260 and FC 330l are pretty small. The FC has a construction advantage. If CNC molds are right, so are the airplanes. You may have to adjust the incidence, but the wings, stab, and fuse are all close to perfect. The TB is like anything made from balsa, ie, less than perfect. So the FC tracks a little better. A local Flier has made a clone of the TB, He's a perfectionist and his is very true and tracks as well as the FC. That's why I think it's a matter of construction and not inherent in the design. The FC has one little flaw. Sometimes the tail wiggles in yaw a little. There is a fix that involves adding something on the trailing edge of the rudder, I'm not sure exactly what it is, but intend to look at the FC at the TOC to see what needs to be done.

The TB advantage is in 3D. It's based mainly on being lighter. Ours is 22.5 compared to the FC at 24.25. With the TB you have more time to correct a mistake. For instance, if you are drifting a little sideways on a hovering rudder touch the FC falls to the side noticeably harder and you have less time to save it. The extra weight of the FC means you hover at a higher throttle setting. So the tail surfaces are more effective in a hover for the same throw setting. This just means you need more throw on the TB. The FC just flies a little heavier.

I think it comes down to the FC is probably best at precision flying because of the true airframe. The TB is best at 3D because of the weight. Keep in mind the differences are pretty small. I prefer the TB overall. Keep in mind that I had over 100 flights on the TB before flying the FC. If it had been the other way around, I might like the FC better.