A free-trailing vane flow direction indicator employing a linear output Hall effect transducerThe Hall effect vane (HEV) was developed to measure flow angularity in the NASA 40-by-80-foot and 80-by-120-foot wind tunnels. This indicator is capable of sensing flow direction at air speeds from 5 to 300 knots and over a + or - 40 deg angle range with a resolution of 0.1 deg. A free-trailing vane configuration employing a linear output Hall effect transducer as a shaft angle resolver was used. The current configuration of the HEV is designed primarily for wind tunnel calibration testing; however, other potential applications include atmospheric, flight or ground research testing. The HEV met initial design requirements.
Document ID
19890040304
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Zell, Peter T. (NASA Ames Research Center Moffett Field, CA, United States)
Mcmahon, Robert D. (NASA Ames Research Center Moffett Field, CA, United States)