Throwing an aside here that anyone interested in 1940s war technology must check...

		dw_arthur 32 days ago \| parent \| context \| favorite \| on: $96 3D-printed rocket that recalculates its mid-ai... Throwing an aside here that anyone interested in 1940s war technology must check out the old BBC documentary The Secret War (1977) which goes into depth on solving the engineering challenges of the war.

Well worth a watch. I think I watched it on Youtube.