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Negative values first appeared in the Greyhawk supplement, because it first applied them directly to the Armor Class. [20] In editions prior to 3rd, armor class ranges from -10 to 10. Having an AC of 10 was the weakest, and a -10 being the strongest possible written AC. [21] In subsequent editions, armor class instead starts at 10 and increases.
Tri-Stat dX (including Big Eyes, Small Mouth), as the name would suggest, uses three (Body, Mind, and Soul), whereas a more common division of three, and used in the Cortex Plus game Firefly is Physical, Mental, and Social, but expands with the Storyteller System's attributes.
In some role-playing games, armor class (abbreviated AC; also known as defense) is a derived statistic that indicates how difficult it is to land a successful blow on a character with an attack; it can also indicate damage reduction to a character's health. AC is typically a representation of a character's physical defenses such as their ...
The design and purpose of the vehicle determines the amount of armour plating carried, as the plating is often very heavy and excessive amounts of armour restrict mobility. In order to decrease this problem, some new materials ( nanomaterials ) and material compositions are being researched which include buckypaper , [ 2 ] and aluminium foam ...
A Chinese publication lists 30MnCrNiMo "685" steel as the material used in Chinese rolled armor plates, with a Brinell Hardness of HBW 444-514 (thin) / 429-495 (thick). According to the same publication, older vehicles use a 22SiMn2TiB "616" steel with a hardness of HBS ≤ 219.
Parthian and Sassanian heavy cavalry known as Clibanarii used cuirasses made out of scales or mail and small, overlapping plates in the manner of the manica for the protection of arms and legs. Plate armour in the form of the Lorica segmentata was used by the Roman empire between the 1st century BC and 4th century AD.
The inward-firing flyer will impact the vehicle main armor, causing damage if the armor is not thick enough, so these can only be used on heavier armored vehicles. Lighter vehicles use open-face sandwich reactive armor (see below). However, the dual moving plate method of operation of a symmetrical sandwich offers the best armor protection.
The Excel was an American cyclecar manufactured in Detroit, Michigan by the Excel Distributing Company in 1914. The two-seater cyclecar weighed 1,000 lb (450 kg), and had a 1.5 L water-cooled four-cylinder engine. It was driven by a friction transmission with belts.