Chevrolet’s 1950 short film, “E for Efficiency,” produced by Jam Handy, touts the efficiency of Chevrolet’s valve-in-head engine. This type of engine (02:12) is only found in Chevrolets when it comes to sedans, such as the 1949 or 1950 Chevrolet Styleline (00:51). The film begins with an animation to briefly explain the general idea of efficiency. Continuing with animation, the film looks at a simplified model of the valve-in-head engine and how it maximizes power and fuel economy, piston strokes, and heat loss. It compares the efficiency of the valve-in-head model to the L-head type. Part of the success of Chevrolet’s engine is making the pistons and cylinder block from the same cast alloy (06:18). The film shows how Chevrolet’s valve-in-head engine has perfected engine lubrication (06:58) by lubricating cylinder walls and bearings. Chevrolet isn’t the only company to utilize the valve-in-head type: some of the fastest race cars (08:02) in the world use it, as well as airliners, like Eastern Air Lines and what appears to be its Douglas DC-4 jet (08:09). The film concludes by showing several Chevrolet models with the valve-in-head engines, including what appears to be a 1949 Chevrolet Fleetline Deluxe (08:34) and a 1950 Chevrolet Bel Air Convertible (08:40).

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This film is part of the Periscope Film LLC archive, one of the largest historic military, transportation, and aviation stock footage collections in the USA. Entirely film backed, this material is available for licensing in 24p HD and 2k. For more information visit http://www.PeriscopeFilm.com