Possibly worst aircraft ever made. Designed by conman William Christmas it had a flexible wing that would "flap like a bird". First Bullet crashed when the wing detached on its maiden flight in 1918, killing the pilot. Christmas made a second one, the one in the photo, claiming at an expo in March 1919 the unflown aircraft had reached almost 200mph during testing. This Bullet fatally crashed out of control on its first flight. Christmas then left aviation having made a lot of money from the US Army Bullet contract. Photo from: National Archives at College Park, Maryland