On Sunday, September 29, 2019 at 1:45:20 PM UTC-4, wrote:
Does anyone know if it is safe, assuming you are properly trained in aerobatics,
to perform loops, rolls and inverted flying in a 1-26E?
Glider is rated at +5.3 -3.3 Gs

Loops are fine but it takes a lot of time (and altitude) to build up sufficient speed. I would not do inverted flight because you don't know what's going to come up from below the floor boards. When I did an acro course, everything in your pockets was locked away before the flight. If anything was ever dropped in the aircraft, you did not fly until it was found.

Tony