Spindizzy

The Dillon-Wagoner Graviton Polarity Generator, known colloquially as the spindizzy is a fictitious anti-gravity device imagined by James Blish for his series Cities in Flight. This device grows more efficient with the amount of mass being lifted, which was used as the hook for the stories—it was more effective to lift entire cities than it was something smaller, such as a classic spaceship. This is taken to extremes in the final stories, in which an entire planet is used to cross the galaxy in a matter of hours using the spindizzy drive.