Total-head Meter with Small Sensitivity to Yaw
This is a 1935 NACA technical memorandum on total-head meters, aeronautical pressure instruments, issued by the National Advisory Committee for Aeronautics for aircraft research engineers and wind-tunnel testing. The pictures show a cross-section drawing of a total-head probe with a dimensioned cylindrical body and a chart of pressure error against yaw angle, plus smoke-style flow photographs of a cylinder and a venturi tube in yaw and a photograph of a probe mounted on a wing. A designer could take from them the clean line-and-hatch technical drawing style and the grid-plotted performance graphs.
