Why do flying saucers have to spin while flying?
Set during the Cold War period, the then-president rented five (5) flying saucers from the extraterrestrial aliens and a few training exercises were conducted in the air space above Roswell. My father was a young US Air Force lieutenant and mentioned he had crashed landed one of the saucers during training, leading to his court martial.
Unfortunately, he never told me anything about the saucer except that the chassis rotates at high speed and is powered by an antimatter propulsion engine. I want to know why flying saucers have to spin during flight.
There aren't rotary blades to generate lift inside the atmosphere and it is a complete vacuum in space, kindly use magic sparingly and no FTL tech.