Knight's sleeve valve engine had two sliding sleeves per cylinder, each connected to a "half-time shaft" by connecting rods. The half-time shaft, powered by a belt from the crankshaft, ...

An ailing Frank Stearns retired soon after, but in the 1920s Stearns-Knight offered another six and eventually a sleeve-valve straight-eight (see Escape Roads, Nov. 3, 2003) before succumbing to ...