Fullsize image: https://s3-us-west-1.amazonaws.com/h...9_fullsize.jpg
https://s3-us-west-1.amazonaws.com/h...1686341049.jpg
Printable View
Wooden hulled PT boats had 6.6 tons of Cu, Zn, Pb? Hard to believe. That's a significant fraction of PT-20's 40 gross register tons.
https://en.wikipedia.org/wiki/Patrol_torpedo_boat_PT-20