The Messerschmitt Me 262, nicknamed " Schwalbe" and "Sturmvogel," was the world's first operational jet-powered fighter aircraft, designed by Messerschmitt. Development began in 1939, with its maiden flight in 1941 and first jet-powered flight in 1942. Delays due to engine and metallurgy issues, as well as interference from German leaders, impacted progress. It became operational in mid-1944, proving faster and more heavily armed than Allied fighters, but was ineffective towards WW2's end.