Stalled. That's it. No wing drop, cleanly and straight ahead. No drama. Who'd have thought it?
I've never flown a Decathlon but my gut feeling tells me that this is not entirely unexpected. Being a high-wing, the center of lift is above the center of gravity. Because of that, it doesn't need dihedral to remain stable. And from memory, it also doesn't have any sweep. It's basically a straight plank wing. That means that the lift and AoA, even in a severe sideslip, is more or less identical left/right. (There might be a little blanking from the fuselage though.)
With a low-wing aircraft you need dihedral to remain stable. In a sideslip, this causes a difference in AoA left/right, and this would induce, I think, a wing drop when stalling.
At least, that's what my gut feeling is telling me. Next time I'm up in the (low wing) R2160 I'll try a full-rudder stall and see what happens. (And yes, I'm current in spinning an R2160.)
Mark1234, can you please explain what you mean by this?
What Mark means is that a stall is not so much associated with speed, but with the AoA of the wings. And these have an almost 100% direct relationship with stick position. In other words: when you pull back at the stick, the aircraft will stall at the same stick position, regardless of speed, actual weight/balance, altitude and a number of other factors. As long as you keep the stick/yoke forward of this position, you will not stall or spin.
(Note that the stall stick position may vary slightly with the engine power setting though, since the propwash over the tailplane makes the tailplane more effective. In addition to this, the propwash also has an effect on the AoA of the wing portion that's in the propwash.)