I have seen a number of glider advertised and most tell you the total time. Unlike a powered airplane which has a tach or a Hobbs meter, gliders seldom have any built in way to determine the actually time on the air frame. While people might try to inflate their personal flying time, I would not be surprised if many of these gliders are low balling their actual air frame time which I presume has a lifetime limit in one way or another. Is there any reasonably foolproof/accurate way to determine the true time on an airframe? I cant think of one.

Walt