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).
Summary of tests on the lubrication of worm and nut steering using different oils.
| Identifier | WestWitteringFiles\Q\2-July1927-September1927\ 68 | |
| Date | 27th August 1927 guessed | |
| contd :- -2- it is not the only factor to be considered. Thus Iso-Vis is thicker than Amber gear oil but less efficient, Mobile E.{Mr Elliott - Chief Engineer} thicker than lard or sperm, but has a considerably greater tendency to promote sticking than either. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} SUMMARY OF TESTS ON THE LUBRICATION OF WORM AND NUT OF STEERING USING DIFFERENT OILS. ------------------------------ The temperature in each case was approx. 59°C. Taking the efficiency of the steering with Prices amber gear oil as 100% for purposes of comparison. Amber gear oil ................ 100% Prices B. ..................... 98% Castor ........................ 96% Prices C. ..................... 96% Iso-Vis. ...................... 90% Sperm ......................... 75% Lard .......................... 50% Mobile E.{Mr Elliott - Chief Engineer} ..................... 25% Hs{Lord Ernest Hives - Chair}/CMH. ****************************** | ||