Best Of The Web: How Merlins Were Built

Anyone who has visited Oshkosh has heard the unique exhaust song of the Rolls-Royce Merlin. Nearly 150,000 of these iconic 12-cylinder engines were manufactured, some in the U.S. as the Packard V-1650. In this fascinating documentary, the assembly of the engine's 11,000-plus parts is described in rich detail. (Credit King Rose Archives.)