Chris- thanks, I agree, and that's the reason I started flying c/l in the first place, to learn something new.
Phil- spoilers or spoilerons are landing aids. They deteriorate lift.
Snap flap, or more correctly "camber to elevator" is the opposite. It's a pitch aid/lift increase of the wing...
Spoilerons would be like the flaps going up while the elevator goes up on a stunt plane. It's designed to keep pitch attitude the same, while losing some lift.
Tim- yes, the tail moment is much longer, but wing area to tail area is typically much less than 10%, especially on the v-tailed f3b planes I fly....
Additionally, I'll go out on a limb and say that in the sailplanes that I fly, the cg is much closer to the neutral point that with the average c/l stunt plane (I think). That's probably only allowed by that long tail moment. I know that horizontal tail volume is horizontal tail volume, but I think I can feel the difference between boom length and h stab size, even if the volume is the same or nearly so. The longer boom provides more damping I believe even with the same tail volume.
Anyway, I'm totally off topic here now.
Yes, some crazy sailplane bastards like me use full wing trailing edge camber movement mixed to the elevator, just like c/l stunt planes, in the opposite direction, to increase pitch response. The amount is very small comparatively though. My F3F/B planes I use about 4-5mm (measured at the flap root) with full up elevator. The wings are usually only 7-8% thick in profile though....
Back to c/l!