On Tuesday, January 2, 2018 at 12:20:13 AM UTC-5, wrote:
I see all the sailplanes doing the long flights in Namibia are either self-launching or fitted with sustainers. I imagine the logistics of getting trailers and crews to Namibia, as well as flying over pretty isolated areas, must make flying there in a conventional sailplane pretty daunting.

They don't have a towplane.