Why NASA Couldn’t Rebuild the Saturn V’s F-1 Engine

Cited as the standard illustration of lost tacit knowledge and why old blueprints cannot be turned back into hardware.

Short Curious Droid video on why NASA could not simply rebuild the Saturn V's Rocketdyne F-1 engine for the SLS boosters. It explains that the engines were hand-tailored and that much of the know-how was never documented, so the blueprints were not enough.