RHA stands for Rolled Homogeneous Armour. Through the end of World War 2, the armour for almost all tanks and other armoured vehicles was sheets of steel. Increasing the protection on a vehicle meant adding thicker sheets of steel, increasing the vehicle's weight and reducing its mobility. Since then, other forms of armour, incorporating empty spaces and materials such as ceramics or depleted uranium in addition to steel, have been developed.
The term is used currently as RHAe (Rolled Homogeneous Armour equivalency) to give a rough estimate of either the penetrative capability of a projectile or the protective capability of a type of armour which may or may not be steel.
This technique of estimating the protective capacity of armour by calculating how thick rolled steel would have to be (in millimeters) to afford the same degree of protection has been illustrated by some with the following:
"Using RHA equivalencies to measure the protective capacity of armour is a lot like weighing a pig in Iowa. You lay a board over a fence, and you put the pig on one side, and a load of bricks on the other. Then, you guess the weight of the bricks."
Composed of layers of metal, ceramics, and spaces, this new armor is far superior to RHA (RolledHomogeneousArmor) in defeating kinetic and chemical energy weapons.
To increase crew safety and survivability, all of the M1's ammunition is stored in armored compartments which are designed vent dangerous gasses and fragments away from the crew in the event of an ammunition explosion.
The driver sits centered in the hull and forward of the turret, while the loader, gunner and tank commander occupy the turret, with the loader situated to the left of the main gun and the gunner and tank commander sitting in tandem on the right side.
RHA stands for RolledHomogeneousArmourArmour (spelled armor in American English), is protective clothing intended to defend its wearer from intentional harm in combat and military engagements, typically associated with soldiers.
The term is used currently as RHAe (RolledHomogeneousArmour equivalency) to give a rough estimate of either the penetrative capability of a projectileprojectile is any object sent through the air by the application of some force.
The usefulness of RHAe in comparing different armour has been described thus: "Using RHA equivalencies to measure the protective capacity of armour is a lot like weighing a pigpig is one of the 12-year cycle of animals which appear in the Chinese zodiac related to the Chinese calendar.
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