Ames 5 degrees-of-freedom motion simulator: This simulator incorporated a centrifuge of 30ft radius. The simulatored cockpit, located intn a hooded cab at the end of the centrifuge arm, was driven by motors, as required by the simulation, about each of its three axes (itch, roll, and yaw). The cab was also driven through a limited range of motion along the vertical axis and of course was driven by the centrifuge arm along a curved path of fixed radius in the horizontal plane. Thus the motions that could be simulated i the cab were three angular motions, one translational motion, and a curvilinear combination of the remaining two translational motions. The curvilinear motions, and associated accelerations, were, of course, fairly representative of airplane flight. The simulator was placed in operation early in 1961. ref: Adventures in Research (pg 341/341) NASA SP-4302 ARC-1962-A-29323