to make a rigid wing, try not to fiddle around with its mass it should always be ´1´. All moving parts that support any kind of weight should be ´1´. Also if the wings come into contact with other parts they may brake therefore I recommend that you disable aircraft collisions on them. To solve the wing breaking problem remove the drag. For wing shape take a look at this: https://www.simpleplanes.com/a/18976s/Four-Advanced-but-simple-wing-designs
to make a rigid wing, try not to fiddle around with its mass it should always be ´1´. All moving parts that support any kind of weight should be ´1´. Also if the wings come into contact with other parts they may brake therefore I recommend that you disable aircraft collisions on them. To solve the wing breaking problem remove the drag. For wing shape take a look at this: https://www.simpleplanes.com/a/18976s/Four-Advanced-but-simple-wing-designs