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Concrete blocks close to Lake Geneva in Gland Fortress "Villa Rose" Maxim Machine Gun Model 11 in the "Villa Rose" The Toblerone line is a 10 km long defensive line made of "dragon's teeth" fortifications built during the Second World War between Bassins and Prangins, in the Canton of Vaud, Switzerland. These lines of defensive blocks can be ...
The Highland Railway Drummond 0-6-4T or X class were large tank engines originally intended for banking duty. They were designed by Peter Drummond . Construction
A tetrapod is a form of wave-dissipating concrete block used to prevent erosion caused by weather and longshore drift, primarily to enforce coastal structures such as seawalls and breakwaters. Tetrapods are made of concrete , and use a tetrahedral shape to dissipate the force of incoming waves by allowing water to flow around rather than ...
A compressed earth block (CEB), also known as a pressed earth block or a compressed soil block, is a building material made primarily from an appropriate mix of fairly dry inorganic subsoil, non-expansive clay, sand, and aggregate. Forming compressed earth blocks requires dampening, mechanically pressing at high pressure, and then drying the ...
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Dragon's teeth are pyramidal anti-tank obstacles of reinforced concrete first used during the Second World War to impede the movement of tanks and mechanised infantry. The idea was to slow down and channel tanks into killing zones where they could easily be disposed of by anti-tank weapons. They were employed extensively, particularly on the ...
Anti-tank obstacles include, but are not limited to: The Czech hedgehog, dragon's teeth and cointet-element are the most famous types of World War II anti-tank obstacles. Anti-tank trenches were used on the western front during World War I, and in the Pacific, Europe, and Russia in World War II. Anti-tank mines are the most common anti-tank ...
Its defining characteristic is a central concrete pedestal with a stainless steel peg (rust-free even after more than 60 years). The pedestal was for a type of spigot mortar called the Blacker Bombard — effective against both tanks and personnel at ranges of about 100 and 500 yards (90 and 460 m) respectively.