A "brand new" B-29 named "Doc"

Harley copied the '38 BMW R71 and called it the XA (experimantal Army) I read it was a straight redesign with SAE fasteners instead of Metric. Lots of sharing back then pre-war and all. Packard did the same thing when they built the Merlin under license from RR, they had to retool with SAE fasteners, and ended up making a better copy with much closer tolerances. Packard Engineers were suprised when they saw the tolerances they were supposed to be building into the motor. "...uh, we cant build this motor like this, its too sloppy!" Gotta love industrial Espionage...Jap capacitor formula leaks out and everyone copies it, except it was a bad formula and now everyone's capacitors are bad.