William M. Schulze, George C. Ashby, Jr., John R. Erwin
naca-tn-2830
Nov 1952
An investigation has been conducted to provide a basis for the design of combination probes intended to survey the static total pressure and direction of flow with special reference to subsonic turbomachine testing.
An Adobe Acrobat (PDF) file of the entire report:
http://naca.central.cranfield.ac.uk/reports/1952/naca-tn-2830.pdf