These are cutaway sketches of a 1950s design proposal for the USAF’s Project 1794. The purpose of this project was to build a supersonic flying saucer. According to documents alongside the project, the saucer was supposed to reach a top speed of “between Mach 3 and Mach 4, a ceiling of over 100,000 ft. and a maximum range with allowances of about 1,000 nautical miles”.
The cost of building the prototype was estimated at $3,168,000, but the military pulled the plug in 1960 after the saucer was unable to meet desired expectations.
Via Wired