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).
Analysis of light and heavy aeroplane engine oils, detailing their physical properties.
| Identifier | ExFiles\Box 77\2\ scan0003 | |
| Date | 7th September 1917 | |
| Messrs. Rolls-Royce, Ltd. 7/9/17 ANALYSIS. LIGHT AEROPLANE ENGINE OIL A.N. Specific Gravity @ 60 Fh.......... 885 Viscosity @ 70 Fh.......... 795 " @ 140 Fh.......... 140 " @ 200 Fh.......... 58 Flash Point (close).......... 435 Cold Test.................. 30 Fh. HEAVY AEROPLANE ENGINE OIL C.N. Specific Gravity @ 60 Fh.......... 893 Viscosity @ 70 Fh.......... 2460 " @ 140 Fh.......... 297 " @ 200 Fh.......... 96 Flash Point (close).......... 438 Cold Test.................. 30 Fh. Viscosities taken through Boverton Redwood Viscometer. Flash Points by Pensky-Marten's Apparatus. | ||