Recently i was watching the Histiry channel and there was a documentry which cought my eye. German scientists who were brought to the united states were reported to have said that the naxis created a flying saucer that went mach 2 and also created a smaller saucer which could go as fast as allied fighters and bombers and rewmote controll

I think they only designed it but never flew though?

yes they did fly, in the last months of the war allied bomber pilots noticed colored balls of fire in the sky which german scientists admited making.