February 29, 1952. Harvard Mk 4 20242 (C-FWPK) enters service with the RCAF. pic.twitter.com/7a2wifKg1Z
In the Nemuth Parasol, built by students at Miami University, demonstrated that even a circular wing could be used to fly a plane reliably. Hundreds of years from now, of course, this design principle will be adopted for spaceships.