Credit to Lautinus for the katanas idea; the blades create a nice curve that is otherwise hard to achieve at such a small scale. I suppose that katanas are also appropriate since one of the SR-71’s other nicknames, “Habu”, was coined by Japanese civilians who thought that the aircraft resembled a species of snake native to Okinawa. A-12s, and later SR-71s, were based on the island from 1968 to 1990.
