The Heinkel He-162
This was one of the fastest planes to be designed and made. It only took 90 days to complete the design and production of this plane. Built-in wartime with a shortage of materials, it was constructed out of wood. On top of that, the planes were flown by teen pilots. It required careful handling, but the glue that held it together corroded the airframe. It was in use only from January to May 1945.
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The Fairey Battle
Developed specifically for the Royal Air Force in the mid-‘30s, it had a Rolls-Royce Merlin piston engine and a lot of promise. Sadly, it was slow, heavy, and limited. In just a single week, around a hundred planes got shot down. It was withdrawn by the RAF at the end of 1940.