P-75 Eagle walkaround
Conceived of within a month after Pearl Harbor as a brainchild of P-40 designer Donovan Berlin, the XP-75 was General Motors’ attempt to enter the fighter aircraft field. As an expediency, components from existing aircraft designs were to be used, including P-40 wing panels, an SBD tail, and an F4U undercarriage. Integrating subassemblies from such disparate parts from different manufacturers, predictably, turned out not to be so easy. Even more radical was the P-75’s amidships mounted engine, the Allison V-3420. This combined two V-1710 engines with a common crankshaft, but never lived up to expectations. V-3420s were also used to reengine the XB-19 and XB-39 prototypes.