A Stanford.edu article details that Whittle patented a turbojet design as early as 1930, but his first jet-powered aircraft didn't fly until 1941. Ohain, meanwhile, got there first.

The Italian Air Force celebrated the phase out of the T-339A jet trainer and the phase in of its successor, the T-345A. The Italian Air Force said goodbye to its long-standing Aermacchi MB-339A ...