Modern sailplanes have evolved through the years and many older have lasted the test of time. During the 1970's Schelicher produced what I call the, "Greatest Of All Time", the ASW20. Production began around 1977 and immediately sailplane pilots were joining the ranks of owning the sleek beautiful glider. The early models, incorporated a wonderful flap system that allowed the pilot to land in places that were usually out of reach for other sailplanes. Dragging that 20 in with those full landing flaps was truly impressive. Some had problems with the flaps, yes they were to be respected and if used improperly could and did result in deadly accidents.
There were over 900 ASW20's built including wing extension models know as the L. The early models were fantastic to fly, offering a floppy wing as we called it, which was impressive to watch during pull up from most any speed.. Later models were changed to a lesser flap configuration and much stiffer wings.
In comparison, the other most competitive 15 meter ship was the LS3, which was released in 1976, total production numbers were 429. This was a great flying glider but lacked the success of the ASW20.
By comparison The ASW27 was released in 1997 with 237 produced units and the LS6 came along in 1983 with 375 produced units.
Having owned or flown all the mentioned gliders I would say that the ASW20 was the Greatest Of All Time and even today has survived the test of time, very gracefully I might add.
How would you rate the GOAT? Bob