Comparative Performance of a Powerplus Vane-type Supercharger and an N.A.C.A. Roots-type Supercharger
This is a 1932 NACA technical report comparing a Powerplus vane-type supercharger with a Roots-type supercharger, issued by the National Advisory Committee for Aeronautics for aircraft engineers and researchers. Its pictures are plain engineering graphs of speed, pressure and volume curves drawn in black line on cream paper, with solid and dashed lines, numbered data points and hatched areas, useful to a designer for restrained scientific chart layouts and grid typography.
