in early 1921, including the reduction of the ship's horsepower from 180,000 to 160,000 and the reduction of the main armament from 16.5 in to . Design and description The G3s incorporated several novel features for dreadnought-era capital ships, or at least for British designs of this type. Most immediately noticeable was the concentration of the main battery forward of the bridge and engineering spaces, giving the ships a tanker-like appearance. Since the G3s were to use existing dockyard facilities, this layout allowed designers to keep the length of the ships, as well as the weight of armour, to a minimum. The resulting loss of heavy fire astern was considered justifiable since the ships were intended to fight on the broadside. A related feature of the G3 and N3 designs was their tower bridge structure behind the first two gun turrets. This provided a better and more stable foundation for fire-control equipment, greatly improved accommodation and protection from the weather. General characteristics The G3 battlecruisers were significantly larger than their predecessors of the Admiral class. They had an overall length of , a beam of , and a draught of at deep load. They would have displaced normally and at deep load, over more than the older ships. They had a metacentric height of at deep load as well as a complete double bottom. Propulsion The G3 battlecruisers would have had four geared steam turbine sets, each of which drove one propeller shaft. They were arranged in three engine rooms. The forward engine room held the two turbines for the wing shafts, the middle compartment housed the turbine for the port inner shaft and the aft engine room contained the turbine for the starboard inner shaft. The turbines were powered by 20 Yarrow small-tube boilers divided between nine boiler rooms. They were designed to produce a total of at a working pressure of and temperature of with superheat. Maximum speed would have been . The ships had a maximum capacity of of fuel oil. Using the cruising turbines, they had an estimated maximum range of at . They had six turbo-driven dynamos and two diesel generators. Armament Housing the main armament in triple turrets was new to the Royal Navy though British companies had been involved in the production of triple gun turret designs for other navies. The choice of a high muzzle velocity with a relatively lighter shell was