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).
Letter discussing steering efficiency tests and the phenomenon of 'stricking' friction at high temperatures.
| Identifier | ExFiles\Box 67\4\ scan0351 | |
| Date | 22th July 1927 guessed | |
| When you make tests of steering efficiency may I suggest that you should make them at a temperature of not less than 150°F or more than 180°F.{Mr Friese} I think you will then reproduce the phenomenon of stricking as it occurs on the road, and will not be able to avoid it at any load above 2000 lbs. except perhaps by using Iso-Vis or Price's D.{John DeLooze - Company Secretary} It seems fairly obvious that this stricking is actually due to the oil being squashed out as you describe, & since the metals of worm & nut enter into the efficiency of the steering (either Phantom or S.G.), one has, for ordinary use on the road "lubricated" friction, and for parking "boundary" friction. On neither car has this phenomenon caused any real trouble except when the box was hot - Sincerely Yrs. Clay (Please address reply to London) | ||