Hood was to have been the first of four such ships, but was the only one completed. Her engines developed 144,000hp, and range was 7600km (4000 miles) at 10 knots. Despite these advantages, whilst engaging the German battleship Bismarck and the cruiser Prinz Eugen on 21 May 1941, her upper armour was breached by a shell, blowing her in two. Only three survived; 1338 were lost.