A Stanley Steamer broke the world record for the fastest mile in a steam car (28.2 seconds). When they shifted the steam boiler to the front of the vehicle, the resulting feature was called by owners the "coffin bonnet." In order to improve range, condensers were used, beginning in 1915. The cars made by the company were referred to as Stanley Steamers. The Stanley Motor Carriage Company operated between 19. Later models had aluminium coachwork, but retained many antiquated features, for example the unsprung tubular steel frame. Later, the Stanley brothers, to overcome patent difficulties, developed a new automobile model with twin cylinder engines geared directly to the back axle. Locomobiles were often modified by their owners, who added third-party accessories, e.g., improved lubricators, condensers, and devices which mitigated the laborious starting procedure, etc. Drive was transmitted directly from the engine crankshaft to a rear-mounted differential by means of a chain. The engine had two double-acting cylinders side-by-side, equipped with slide-valves, and was of the simple-expansion type. There has never been a documented case of a Stanley boiler exploding in use. The boilers were safer than one might expect - they were fitted with safety valves, and even if these failed, a dangerous overpressure would rupture one of the many joints long before the boiler shell was in danger of bursting, and the resulting leak would relieve the boiler pressure and douse the burner with little risk to the occupants of the car. In later models, the fitment of condensers caused oil-fouling of the expansion joints, and welded steel fire-tubes were used instead. In early models, the vertical fire-tubes were made of copper, and were expanded into holes in the upper and lower crown sheets. The boiler was reinforced by winding several layers of piano-wire around it, which gave it a tremendously strong, yet relatively light-weight, shell. Steam was generated in a vertical fire-tube boiler, mounted beneath the seat, with a vaporizing petroleum (later, kerosene) burner underneath. They sold the rights to this design to Locomobile.Įarly Stanley/Locomobile cars had light wooden bodies mounted on unsprung tubular steel frames by means of full-elliptic springs.
Stanley (1849-1940) founded the company after selling their photographic dry plate business to Eastman Kodak. Twins Francis Edgar Stanley (1849-1918) and Freelan O. The demolished "Rocket" Stanley Steamer (1907) courtesy Florida Photographic Collection
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