TESTING DEVICE FOR AUTOMOBILE

PURPOSE:To facilitate the setting of a total pressure pipe by reducing the directivity of the total pressure pipe by providing the taper part to make the aperture of an airstream inlet port so larger as the tipmost side on the tip part of the air current inlet port of the total pressure pipe. CONSTITUTION:The car body 1 of an automobile or model is placed on the freely rotatable table 2 provided inside a wind tunnel, the frame member 4 of grid shape composed of the pipe 3 crossed at equal intervals vertically and horizontally is provided at the downstream of the car body 1 and a total pressure pipe 5 is fitted on the intersecting point of the pipe 3. The air pressure taken out by the total pressure pipe 5 is led to a pressure convertor 7 via a pressure offtake pipe 6 by a copper pipe and vinyl pipe 6b to succeed thereto and converted into electric signal. This electric signal is inputted to the microcomputer 9a constituting a constant pressure line display means 9 via AD convertor 8 and the calculation result is inputted into the displayer 9b composed of CRT or X-Y plotter and visualized.