flow well and would hang up in the hold. Because the predominant cargo for lakers was iron ore, self-unloaders did not become common until higher grade ores were depleted and taconite pellets were developed in the 1970s. Steam power first appeared in the 1860s and became the standard source of power for over a century. The Canadian grainboat Feux Follets of 1967 was the last laker to be built with a steam turbine and thus was the last steamer built on the lakes. Ford Motor Company's and of 1924 were the first lakeboats with diesel engines. Diesel powerplants did not become standard until the 1970s. The last active ships of 1920s vintage, and the oldest ships still operating in non-specialized bulk trades is the motor vessels Maumee of Lower Lakes Transportation. She was built as William G Clyde for US Steel. S. T. Crapo, inactive since 1996, was built to haul cement for Huron Cement Co. back in 1927 and was the second ship of that design, the first being John G Boardman of the same company. S. T. Crapo was the last coal burning freighter on the Great Lakes. The classic design of cabins fore-and-aft with open decks over the hold started with the long R. J. Hackett, designed and built by Elihu Peck in 1869. The first iron-hulled laker was Brunswick, launched at Detroit in 1881. Brunswick sank after a collision later that year and was apparently little known. Many follow the lead of the contemporary Cleveland press and credit as the first iron-hulled laker, launched in 1882. Onokos higher center section did become a standard for later lakers. At , Onoko was the first bulk carrier to hold the unofficial title of "Queen of the Lakes" (longest vessel on the lakes). (1927–1958 ) held the title for 22 years, longer than any other laker of the classic design. Carl D. Bradley is also known for breaking her back and foundering in a Lake Michigan storm in 1958. There were only two survivors. Currently the title of "Queen of the Lakes" is held by the modern stern-ender Paul R. Tregurtha. Launched in 1981 as William J. Delancy, and measuring , Paul R. Tregurtha has held the title since her launch. Wilfred Sykes (1949 – ) is considered to be the first of the modern lakers, and when converted to a self-unloader in 1975 was the first to have