Specification sheet for the chemical analysis and hardness of cast aluminium alloy timing gears used on the Lincoln Zephyr.
| Identifier | ExFiles\Box 127\2\ scan0067 | |
| Date | 9th October 1940 | |
| Material Test Laboratory. re : Cast Aluminium Alloy Timing Gears as used on Lincoln Zephyr. Herewith the specification limits for Chemical Analysis and hardness worked to on the production of this part : Copper . . . . . . . . . 6.0 - 8.0 %. Silicon . . . . . . . . 1.0 - 2.15 %. Iron . . . . . . . . . . 1.5 % Maximum. Zinc . . . . . . . . . . 0.6 % " Magnesium . . . . . . . 0.10 - 0.20 %. Titanium . . . . . . . . 0.20 % Maximum. Aluminium . . . . . . . . Balance. Other impurities . . . . . 1.0 % Maximum. Brinell 70 - 90. H1/GLT | ||
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).