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 report detailing the material analysis and heat treatment of a Hardy Spicer Propeller Shaft.
| Identifier | ExFiles\Box 87\3\ scan0072 | |
| Date | 27th November 1936 | |
| X Ben Prop Shaft 257. To Rm.{William Robotham - Chief Engineer} HL2/AG.27.11.36. Laboratory. Report No.L4185. Re: Hardy Spicer Propeller Shaft. Analysis :- Carbon ... 0.39% Manganese ... 1.31% Nickel ... 0.26% Chromium ... 0.20% Silicon ... 1.19% Molybdenum ... Nil This has been heat treated to give a maximum stress of about 105 tons on the outside, and 80 tons inside. These figures are based on Brinell hardness. Hl. H | ||