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 results of viscosity tests on various oils at different temperatures.
| Identifier | ExFiles\Box 144\1\ scan0112 | |
| Date | 29th January 1925 | |
| Hs.{Lord Ernest Hives - Chair} for Mr.Robotham. 4967 H17/EA29.1.25. Laboratory. X1588 As requested we have made tests on the oils submitted and have obtained the following results :- Oil. Viscosity @ 15ºC Viscosity @ 28ºC Sperm 695 seconds. 295 seconds. Gas engine 2525 " 780 " Lard 571 " 235 " The viscosity of lard oil at 24ºC was found to be the same as that of Price's Motorine "C" at 50ºC. i.e. 350secs. We attach a viscosity curve for Motorine "C". H1. JHE | ||