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).
Worm and nut tests detailing the experimental methodology and results for various oils under different lubrication conditions.
| Identifier | ExFiles\Box 67\4\ scan0370 | |
| Date | 17th August 1927 guessed | |
| WORM AND NUT TESTS. X8430 (1) The type of curves obtained are shown in figs I & II. Nothing was found experimentally to indicate a variation of the coeff. of friction with the load, up to a load as high as 3,500 lbs. This justified drawing straight lines through the experimental values to obtain the average slope. The method of calculating the coeff. of friction and the efficiency are shown behind each curve. The two types of motion considered were the extreme figures obtainable for: 1) Sticking after steady turning slowly in one direction. 2) Flooded lubrication after rapid reversals of direction. Collected and averaged results for various oils are shown in Tables, together with the order of preference for oils as revealed by rig tests. | ||