Imperial Armour Starting in 2015, Forgeworld stopped using the `Volume X' notation, using just Imperial Armour and the title of the book. The rules contained in the following books are no longer valid, having been superseded by later editions of the "Warhammer 40,000" game and other Imperial Armour books. <br> Forge World has also published two Model Masterclass books, which focus on painting the often very large and extensive models they produce: Imperial Armour Imperial Armour is a series of rules supplements to the "Warhammer 40,000" table-top game, along with an associated range of vehicle-size resin model kits. Both are produced by
Imperial and US customary measurement systems ounces (of 437.5 grains). The unit of volume, the gallon, has different values in the United States and in the United Kingdom – the US fluid gallon being about 0.83 imperial gallons and the US dry gallon being about 0.97 imperial gallons. Both systems of measure were widely used in mechanical engineering, though not in electrical engineering. Some units of measure such as the horsepower or the British thermal unit (BTU) have special names but by and large unit names are generated from their constituent components – for example, pounds per square inch. In contrast, the metric system has a