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THE ARGYLL CAR traced its discontinuous Scottish heritage from 1899 to 1908, 1910 to 1914, 1914 to 1932, and a more recent usurpation of the nameplate from 1978 to around 1990, à la today’s Bugatti. The Argyll’s most interesting period, though, was its Burt McCollum single-sleeve-valve era, particularly 1910 to 1914.
What follows here at SimanaitisSays in Parts 1 and 2 are tidbits gleaned from George A. Oliver’s Classic Cars in Profile No. 67 “Single Sleeve-Valve Argylls.”
Why sleeve valves in lieu of the almost ubiquitous poppet valves? And why the single-sleeve-valve concept instead of the already existing Knight double-sleeve design? In each case, engineering elegance was sought. Yet engineering state of the art complicated matters.
In his Classic Cars in Profile article, George A. Oliver begins by quoting Louis Mantell from The Light Car, April 7, 1939: “I have always regarded the single sleeve as a kind of mechanical tragedy, coming as it did when no one needed it.”
Sleeve-Valve Actuation. Rather than poppet valves moving in and out of the combustion chambers, sleeve valves perform the same intake and exhaust functions through movement of concentric tubes around the cylinders. With the double-sleeve-valve concept, each cylinder has a pair of sliding concentric tubes, one with openings dedicated to intake, the other to exhaust. The single-sleeve-valve design requires only one tube per cylinder, with its vertical reciprocation combined with partial rotation to achieve intake and exhaust at the appropriate times.
Double-Sleeve-Valve Daimlers. Charles Y. Knight, Scots-born American automaker, introduced his double-sleeve-valve designs with the English Daimler in 1905. Daimler-Knight engines, renowned for their silence, smoothness, and efficiency, remained in production well into the 1930s.
Oliver noted double-sleeve tradeoffs: “… complicated, costly to build, to service and to repair, and its usually visible thirst for oil gladdened only the hearts of those financially interested in the sale of that lubricant.”
Single-Sleeve-Valve Argylls. Scottish engineer Peter Burt started his internal-combustion engine investigations in 1887. Two decades later, Burt perfected a single-sleeve-valve alternative to the Knight double-sleeve, his provisional British patent granted on August 6, 1909. However, Canadian J.H.K. McCollum’s design, patented June 22, 1909, shared many features with Burt’s concept.
“In the end,” Oliver noted, “agreement was reached and Argylls were granted rights to the McCollum patents, the single-sleeve-valve engine produced thereafter being known as the Burt McCollum.”
Tomorrow in Part 2, we’ll see how the Argyll performed with this innovative powerplant. ds
© Dennis Simanaitis, SimanaitisSays.com, 2019