From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Explanation of the color-coded figures on charts denoting bore dimensions under cold, heated, and bolted conditions.
| Identifier | ExFiles\Box 103\4\ scan0129 | |
| Date | 18th February 1935 | |
| (3) RHC.{R. H. Coverley - Production Engineer}4/MS18.2.35. The figures on the charts in Black denote the bore dimensions above or below drawing size in the cold condition, those in Red ink the dimensions obtained at the same points in the heated condition, and the Green figures represent the variation in bore diameter due to bolting down the cylinder heads. RHC.{R. H. Coverley - Production Engineer} | ||