11h 16min, sep 19, 1940 y - First M3 cast hull firing tests conducted
Description:
The US tested the first cast hull they recieved. It showed it was too brittle and would fracture and spall. The armor needed more ductility. From the results of these tests, the US would order their 2nd hull.Added to timeline:
Date:
11h 16min, sep 19, 1940 y
Now
~ 84 years ago