Different methods for protecting B III coil springs from rust.
| Identifier | ExFiles\Box 100\1\ scan0151 | |
| Date | 27th May 1938 guessed | |
| HHb. To Rm {William Robotham - Chief Engineer} Rm {William Robotham - Chief Engineer} /AFM. {Anthony F. Martindale} B III Coil Springs Reference the Laboratory report herewith, we are trying on the Grump springs protected against rust 1) By cadmium plating without pickling in acid 2) Parkerized springs 3) Stove enamelled springs At present we have N°- ① AFM. {Anthony F. Martindale} | ||
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).