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).
Graphs showing test results for a worm gear in a steering box using various oils at different temperatures.
| Identifier | ExFiles\Box 67\4\ scan0379 | |
| Date | 23th September 1927 guessed | |
| .940 WORM TESTED IN STEERING-BOX. FIG III ISO-VIS OIL (AT VARIOUS TEMPS.) TEMPS. WERE RAISED BY ELECTRIC HEATING ELEMENTS PLACED ROUND THE STEERING BOX. THE ACTUAL OIL TEMP. IN THE BOX WAS MEASURED WITH A PYROMETER. a) RAISING LOAD SLOWLY. b) -------- QUICKLY c) LOWERING -- d) -------- SLOWLY. First Graph (ISO-VIS OIL): Y-Axis: 1300, µ, 1100, 0 X-Axis: 20℃, 30℃, 40℃, 50℃, 60℃ Line Labels: a, d, b, c Second Graph (MOTORINE C.): Title: MOTORINE C. Y-Axis: 1400, 1300, µ, 1200, 1100 X-Axis: 20℃, 30℃, 40℃, 50℃, 60℃, ℃ Line Labels: a, b, c Third Graph (CASTOR): Title: CASTOR X-Axis: 30℃, 40℃, 50℃, 60℃, ℃ Line Labels: a, d, b, c | ||