On Saturday, March 31, 2018 at 6:41:38 AM UTC-4, Charles Longley wrote:
http://home.nwi.net/~blanikam/ba/prod01.htm

Website has some dated info too..."USAF Academy Dual Basic Training Glider of choice." USAFA Switched to the DG-1000 back in 2013!

That being said, I do love teaching in the back of an L-23. Spins are particularly fun.