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).
Laboratory analysis of scale from valves, comparing different samples.
| Identifier | ExFiles\Box 76\3\ scan0025 | |
| Date | 14th January 1918 | |
| P. R.{Sir Henry Royce} 26 (500 Bks ) (SD 747 22-8-17) MP 181927 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To Mr Hives, Works Date: 14th Jan 1918 Order No. Customer's No. Laboratory Re Scale from 708 & quickdrop valves. 1st sample total. Q.S Lump sample K.A.S. Iron Oxide 80.2% 84.5 76.6 Chrom. as Oxide } 4.8 0.2 7.8 " Carbide } 7.5 approx. 8.0 5.5 Carbon traces traces traces D[?] within steel 7.5 7.3 10.4% Equivalent to Chrom. % 6.02% 2.9% 7.8% Thus the scale contains less Chrom than original steel Signed HCSH This Sheet must be filed on completion of the work. | ||