Configuration of typical brig-sloop. In the 1770s, the two-masted sloop re-appeared in a new guise as the brig sloop. The successor to the former snow sloops, brig sloops had two masts while ship sloops continued to have three (since a brig is a two-masted, square-rigged vessel and a ship is a square-rigger with three or more masts, though invariably only three in that period).
Because of either only models or paintings or rebuilding pictures are all that is available, a link has been provided for all US Navy Sloops of War. http://en.wikipedia.org/wiki/List_of_sloops_of_war_of_the_United_States_Navy
HMS Royal George was a 100-gun first-rate ship of the line of the Royal Navy, built at Woolwich Dockyard and launched on 18 February 1756. The largest warship in the world at the time of launching, she saw service during the Seven Years' War including being Admiral Sir Edward Hawke's flagship at the Battle of Quiberon Bay and later taking part in the Battle of Cape St Vincent.