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 composition of a Terraplane gearbox's speed driven gear and motion shaft.
| Identifier | ExFiles\Box 21\6\ Scan160 | |
| Date | 10th May 1934 | |
| To Hs{Lord Ernest Hives - Chair}/Mr. Grylls. Hdy{William Hardy} V4217 HL2/AG.10.5.34. Laboratory. Report No.L3025. Re: Material in Terraplane Gearbox. The samples submitted were very small, and consequently the figures obtained are very approximate. 1st. Speed Driven Gear. 1st. Motion Shaft. Carbon .. 0.30% 0.14% Manganese .. 0.78% 0.50% Nickel .. Nil. 1.82% Chromium .. 1.2% 1.2% HL. HE. | ||