A novel velocimeter consisting of multiple orthogonal disks fitted with pre
ssure transducers has been developed Dynamic pressure differences are measu
red between the center of one disk face and the center of the other face, o
n each of the disks. While previously-developed anemometers based on dynami
c pressure differences (such as yaw or three-hole probes) can only measure
velocities with a small range of directions, the new disk probe can measure
three components of velocity, even in highly three-dimensional flows where
the approximate direction of the flow is not known. Wind tunnel tests have
shown the velocimeter to be quite accurate; it can measure velocities to /- 1.4% and wind directions to +/-4 deg. The velocimeter is very robust and
therefore can make measurements in environments too harsh for most other v
elocity transducers.