Heinkel He 162 A-2 Spatz (Sparrow)
Single engine, single seat, jet fighter, green and silver, BMW OO3E Turbojet engine, ca. 1945.
The German jet fighter that is now synonymous with the project that inspired it, the Volksjäger or People's Fighter program, first flew on December 6, 1944. The Reich Air Ministry issued specifications for the program on September 10, 1944, challenging manufacturer's to design, build, and fly, as quickly as possible, an "emergency, lightweight fighter" powered by a single BMW 003 engine. The specifications also spelled out these key requirements: the new design must be easily mass-produced with the least amount of strategic materials such as steel and aluminum, and flight performance must exceed that of piston-engined fighters.
More info at https://airandspace.si.edu/collection-objects/heinkel-he-162-2-spatz-sparrow/nasm_A196003
Note: it is recommended to use **first person** mode while entering the cockpit view.