This article first appeared in the Volume 4, Number 46 (August, 1942) issue of Aircraft Production magazine, and is presented here through the kind permission of Flight International. Thanks also to Bruce Vander Mark for furnishing volumes of Aircraft Production for scanning.

This second installment of the manufacture of the Rolls-Royce Merlin describes the machining of the crankcases and cylinder blocks cast in the foundry to be described later. In the Erection department a most efficient line system has been adopted whereby the unit sub-assembly lines feed into the main track. A similar system, incorporating elevated rail tracks with turntables leading to sidings, is used also for sub-assembly purposes.