Convair NB-36H Nuclear-Powered Plane
Billed as the ultimate fuel-efficient heavy lifter for both the private and military sectors, Convair’s NB-36 was powered by a 3-megawatt nuclear reactor. A prototype was constructed quite easily, but the project was scrapped in the late 1950s due to its incredible cost and rather significant safety concerns. Still, this aircraft logged 215 flight hours, including 89 with the reactor running.