Smithsonian Report, 1962. — Taylor 



Plate 12 



1. Curtiss D-12 engine, first to fly more than 200 m.p.h., Detroit, 1922. 



2. Rolls-Royce Merlin XX, 1944. 1, Left magneto; 2, aftercooler; 3, control unit; 4, car- 

 buretor air intake; 5, carburetor; 6, supercharger, first stage; 7, supercharger, second 

 stage; 8, engine coolant pump; 9, aftercooler coolant pump. 



