Leatherhead is a term for old style leather helmets used by many firefighters in North America.
Leatherhead is also slang for a firefighter who uses a leather helmet.
DOT standards are aimed at protecting skulls from 90% of impact types ( low to moderate energy impacts according to the HURT Report) and favours a more shock-absorbent helmet.
The maximum G-force allowed by the DOT test is 250g’s, an impact of 200 to 250 g’s to the head would result in a severe, though probably survivable brain injury (the DOT anvil is either flat or “kerb shaped” depending on the test).
Almost a kilogram heavy, the gold helmet is very well preserved, missing only the part of its skull cap.
The form of the helmet and its decorations reveal the autochthonous character of this Geto-Dacian artwork.
The test is then repeated on the same impact point to ensure the helmet can protect from multiple strikes (usually two strikes of equal force) to the same area.
It’s always nice to see what an example looks like.
The Golden Helmet of Coțofenești is a Geto-Dacian helmet dating from the first half of the 4th century BC.