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Sloped armour on the front of Soviet T-54 tank, here cut open to demonstrate the increase in effective thickness. Sloped armour is armour that is oriented neither vertically nor horizontally. Such angled armour is typically mounted on tanks and other armoured fighting vehicles (AFVs), as well as naval vessels such as battleships and cruisers.
For a given normal to the surface of the armour, its plate thickness, increasing armour slope improves the armour's level of protection by increasing the thickness measured on a horizontal plane, while for a given area density of the armour the protection can be either increased or reduced by other sloping effects, depending on the armour ...
Xblocs are typically applied on an armour slope steepness between 3V:4H and 2V:3H. Unlike natural rock, the hydraulic stability does not increase at shallower slope inclinations, because, in that situation, the interlocking effect is reduced. Standard Xbloc sizes vary between 0.75m 3 (significant wave height up to H s = 3.35m) and 20m 3 (H s ...
Sloped armour on the front of Soviet T-54 tank, here cut open to demonstrate the increase in effective thickness. Simply sloping a piece of armour inherently increases its effectiveness by increasing the distance a projectile must travel to penetrate it. It also increases the odds that a projectile will ricochet off the target without causing ...
Basically it seems to me that the horizontal armour has been ignored, unless it is open space, which is not so good for armour. Taking a 45deg slope versus straight, and say a 30cm length/height with 10cm of armour. Right angled armour @ 10cm Area would be 30x10+(30-10)x10=300+200=500 sq cm Sloped armour at 45deg would be 42.4x10 = 424 sq cm
The waterline belt of the Lexington-class ships tapered 7–5 inches (178–127 mm) in thickness from top to bottom and was angled 11° outwards at the top to increase the armor's relative thickness to horizontal, close-range fire (a concept taken from HMS Hood). The downside to this practice was a reduction of the relative height of the belt ...
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To increase effectiveness of skirts against HEAT weapons early T-64s had "gill" skirts. It contained a few short skirts on the side of the vehicle which are opened in open terrain at an angle of between 30–45°, increasing the space between the armour and the plate.