3D JOY

I've only gathered G-force data during pattern maneuvers - no 3D, sorry. What I've gathered has been in a PL Partner and a Quique 72" YAK.

The Partner is smoother and slows better, typically 200' radius loops @ 70 mph or so will be 3 to 4 G's in the pitch axis. Max I've recorded is similar size 180 degree radius at the bottom of a reverse humpty - 7 G's @ 110 mph. Vertical or horizontal snaps are typically 5 to 6 G at the pitch break @ around 60mph.

I've looked at the Reverse Avalanche snap (inside loop from the top / + snap @ bottom). Again, 200' radius loop (about 5 G's) @ 90mph will register 12 G's at the pitch break. Slow to 80 mph and the G's drop to about 10. Essentially similar snap forces as seen with the Partner added to the loop G forces.

Snap G's peak rapidly during the pitch break, then drop off quickly during the stalled rotation. A buried snap or an unloaded snap looks similar.

All G-force data measured at the aircraft CG in the pitch axis.