A hand crank spins a globe made of flexible brass hoops.
Flexible hoops flatten when spun on a hand crank rotator.
A flexible hoop becomes oblate as it is rotated. 1D52.11 flattening Earth M-147 Spin deformable balls. A jug will empty faster when swirled. A rectangular plexiglass box partially filled with colored water is rotated. The parabolic shape is clearly seen.