Originally Posted by
Archimedes
Gap of something like 12-15 months at most, I think? Last Gnat withdrawn from an FTS in late 1978; RAFAT certainly had Hawks by May 1980, since that was when the Hawk/Yacht mast interface occurred at Brighton.
Reds changed over to Hawk in late '79, right after last displays on Gnat at end of '79 season, so pretty much just the 12 months after Gnat was retired from FTS.