When was the jet airplane invented?

Answer 1

During 1908 or so the Wright Brothers created the first man potable and flyable machine, there was only one problem. Throughout WW1 (1914-1918), airplane manufacturers needed to build better fighters. More agile, stronger, powerful, and versatile in order to fight off the other axis planes or allied planes in the sky ( United Kingdom, Canada, United States). After WW1, experiments with airplane wing design were made and finally in the late 30's, biplanes went extinct and the 'new" monoplanes started to get manufactured by companies and plants all over the world. Before WW2 there were top company plane designers that were in a race to complete and construct the first jet plane. Heinkel, Caproni, and Gloster were competing for the first made jet plane. Finally on August 27 of 1938, the German he.178 rolled out the hangar and successfully flew in the air using the first successful and practical turbojet designed engine. Even though it flew at 375 mph, it was still fairly fast at the time, and even the fastest and most complex airplanes had a hard time topping 400mph. So, it showed that there might be a future possibility that the "jet" plane can become successful in combat and producing.

The other contender Caproni released the Caproni Campini N.1 on the 27th of august in 1940 before Pearl Harbor. This airplane however, was completely unsuccessful due to its piston driven jet engine which wouldn't let it past a certain speed,for if it weren't, it could have passed 450mph or maybe even 500mph which definitely would have given the Italians the reputation over the Germans. Next and the final competitor was Gloster's E.28/39 which came out on the 15th of May on 1941, which was also before the Pearl Harbor attack. This plane was successful in flight, however the second airplane that was produced of this kind had crashed from an unmovable aileron. When the plane tried to roll, the aileron wouldn't move and it stayed stable because the wrong lubricants were added in order to make it move properly, but on the overall it was successful and went about as fast as the the he.178. after that the Gloster meteor, he-162, xp-59, me-262 and many other planes were all results of ingenuity and were all jet planes. Some of then went past 510 mph and were the fastest in the skies, and still are till this day.
1943, during WWII
The concept of a jet turbine-probelled aircraft was first documented, independently, by Frank Whittle in the UK in 1928 and by Hans von Ohain in Germany in 1936. Whittle patented his design in the UK in 1930. The first jet aircraft to actually fly was built in Germany in 1939.