THE name of Rolls‐Royce is world‐famous. Their standard is the datum line by which all other productions are compared, whether from the design or workmanship point of view. Their type of products may be subject to discussion, but the correctness of the design and the quality of the workmanship establish a hallmark that cannot be denied. Their policy is to produce only the best, and no effort is spared, and no expense considered, in the effort to obtain higher and improved efficiency. Parts are ruthlessly scrapped if a better method, or greater efficiency, can be obtained by fresh design or an improved system of construction. It is this policy that explains many of the somewhat unusual methods in their works system. Even though their output is large, such things as mass or quantity production do not enter into the system: in fact, everything is produced in very small numbers, no matter what the ultimate number required may be.