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San Francisco circa 1926. "Willys-Knight Great Six four-passenger coupe at Golden Gate Park." With the Spreckels Temple of Music as backdrop. 5x7 glass negative by Christopher Helin. Today's reading from the Shorpy Bible of Betasseled Barouches. View full size.
The Knight sleeve-valve engine dispensed with conventional poppet valves. Instead, a steel sleeve moved up and down each cylinder, alternately exposing and blocking intake and exhaust ports. Though such engines tended to burn oil, they were quieter and adopted by several luxury makes, among them the British Daimler.
Several other American makes -- Stearns comes to mind -- provided a model with a sleeve valve engine, in each case hyphenating the name "Knight" to the basic marque name.
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