show how a gyro serves to inicate a rate of turn. this figure does not show the actual arrange-ment of a turn-and-bank indicator gyro. but is does dem-onstrate the principle of operation. the gyro is set up to measure the rate at which its base is being turned about the Z axis. if the base is not turning,there is no force exerted on the gyro ,since the springs attached to the X axis are adjusted so that under these condition they are in balance.