The Probert Encyclopaedia of Aircraft

P-40D

The Curtiss Warhawk P-40D was a fighter-bomber development of the P-40 fitted with a new engine which allowed the fuselage to be shortened by six inches. The synchronised fuselage machine-guns were abandoned and shackles under the fuselage fitted to carry a fuel tank or 300-500 lb bomb. Racks under the outer wings were fitted to carry six 20 lb bombs.
Research P-40D