Aerotrim

Are your minifigs ready for a workout? This is an aerotrim, a machine which allows for rotation about three axes at once while keeping the center-point of the user fixed. They began as niche exercise equipment and have been popularized in television and movies but are also used in aerospace for training astronauts/pilots.

In this model, the outer ring is connected to the base via tiles with pins, the middle ring is connected to the outer ring via turntables, and the inner chair is connected to the middle ring via plates with pins. Also included is a moveable ramp for accessing the chair.

The main model (not including the ramp) is 6.7" wide, 3.8" deep, and 5.1" tall. The full model with one included minifigure uses 186 total parts.