Something I didn't know, Gliders can do a g-loop. Interesting.,(reply>), (g limits on this glider are +6.5g / -4g),(reply>), The glider in the video (Schleicher K21) is very capable and sturdy. Fully aerobatic, capable of sustained inverted flights and can pull a fair amount of g too. They are very popular as basic trainers because they are easy to fly. ,(reply>), They look so light and spindly, It looks like an angry word could snap them in half!,(reply>), @Mostlyharmless1985 You'd be surprised what they can do... Some aerobatic gliders are rated to take higher g forces than most fighter jets!