ORIGINAL: Flypaper 2
Right on about the expo. When you give full throw, it's going to snap whether it has expo or not. On a meany like that I start doing very large loops, then gradually tighten them up to the point where it snaps. then back off on the next one till it doesn't snap. Judge that position, say half back stick. Land the plane. Give it half back stick. Now you know where to set the throw without snapping. Many high wingloaded planes are just as happy to snap at high speed as well. Used to have a Yellow Cap 10B was notorios for snapping, yet it was the best aerobatic plane I've ever had. Would do two perfect Lomcevecs one on top of the other and if you held it in it would go into a perfect knife edge spin. But if you did a high speed flypast and give el. alone it would do the quickest snap you've ever seen. Had about 1/2 of el. travel on a 1/4 scale plane. I have another one almost finished.
Gord.
ABSOLUTELY !!! Exactly the truth about this topic.
Aerobatic airplanes REQUIRE elevator deflection that can and will stall the wing. And that means you have to fly loops and such with less than that deflection. That's one of the primary reasons Dual Rates were invented.
It's not an error in design or a failure of the airplane that some of them tend to stall out of loops or stall off on one wing when landed too slowly as many inexperienced flyers instantly assume. It's the pilot using too much elevator and/or trying to steer with ailerons when the steering should be accomplished with the rudder.
Tune your elevator throws. Tune your dual rates. Tune the CG location. Then tune all three again. Then tune your flying skills.