X class or Class X may refer to: Automobiles Mercedes-Benz X-Class, a luxury pickup truck Railway locomotives TGR X class, a class of diesel-electric locomotives used by the Tasmanian Government Railways NZR X class, a class of steam locomotives used by the New Zealand Railways Department South Australian Railways X class, a class of steam locomotives used by the South Australian Railways Victorian Railways X class, a class of steam locomotives used by the Victorian Railways in Australia Victorian Railways X class (diesel), a class of diesel locomotives used by the Victorian Railways in Australia WAGR X class, a class of diesel locomotives used in Western Australia NCC Class X, a class of steam locomotives used in Northern Ireland NER Class X, a class of steam locomotives used on the North Eastern Railway of Britain Nilgiri Mountain Railway X class, a class of rack and pinion steam locomotives used in India Ships X-class submarine, a British midget submarine X-class lifeboat, operated by the RNLI Model yachts San Francisco Model Yacht Club X Class, a model yacht class Drones X Class drone racing, which is a name used for first-person view (radio control) giant drone racing Other uses Tenth grade, Class X, secondary education in countries such as India and Indonesia. X is the class of solar flares with the highest peak soft X-ray flux See also Class 10 (disambiguation)