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).
Note comparing the weight and specific gravity of different alloys (Magnalium and 2L5 Aluminium) for a bottom half crankcase.
| Identifier | ExFiles\Box 36\3\ scan 044 | |
| Date | 22th January 1917 | |
| R.R. 26 (21a) S.D. 71. 18-12-16. X. 3031 ROLLS-ROYCE LIMITED. INSTRUCTIONS. 16 S 1917 To Mr Clarke Order No. Customer's No. Copy of note sent to Mr Nodin 22-1-17. Weight of bottom half Crankcase lbs ozs drs 2L5 Alloy 1 - 1 - 8 Present alloy 1 - 0 - 3 average of 12 Magnalium 1 - 3 - 0 Specific Gravity Tests 2 L5 Aluminium Alloy 2.93 Magnalium 2.999 Signed AHS This Sheet must be filed on completion of the work. | ||