Circa mid 70's, kirby Cadet Mk III. 3 solo's to qualify. I sang all the way around and they went like a dream. Sadly, that was the last time I flew in a glider.
3 March 07, 1st powered solo. VERY scary, but went as advertised. Was too nervous to sing. 2nd solo, a couple of weeks later, was very scary- left a lot of rubber on the runway!