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).
Cause of squeaking slipper dampers and proposing a new treatment using black lead and lanoline.
| Identifier | ExFiles\Box 66\4\ scan0075 | |
| Date | 23th November 1926 | |
| RECEIVED STAMP: NOV 24 1926 Handwritten: X8300 C. Hs.{Lord Ernest Hives - Chair} BY20/H.{Arthur M. Hanbury - Head Complaints} 23.11.26. SLIPPER DRIVE. ----------------- Referring to MX{John H Maddocks - Chief Proving Officer}9/T.17.11.26. it is difficult to form any estimate as to what is the actual cause of this further trouble in the direction of squeaking slipper dampers. It would be distinctly helpful if, the next time one of these exceptional cases occurs, we could have the slipper damper taken off as a unit, without dismantling at all, so that we could together dismantle same and examine the parts carefully, piece by piece, as we took the parts down. The only further suggestion that I can offer at the moment is that there must be a tendency for the slipper surfaces on the wheel to corrode or rust when they are standing, possibly as the result of being in contact with the material having cotton as a part of its make-up. It appears to me that it is just possible that if we made up a few slipper dampers which had fabrics treated in the first place with a mixture of black lead and lanoline, the fabrics being thoroughly dried out by warming up to a temperature of boiling water, and holding these until the moment that the black lead and lanoline mixture was applied, this combination would have certain valuable properties, namely:- a/- The lanoline would prevent rusting. b/- The graphite would tend to form a polished surface which would not, one would imagine, be so seriously affected by absence of oil when chassis was standing, as would happen in the case of one of the units treated by our present standard method. I would like to suggest that we put through a number of units, say one dozen, treated in the above manner. BY.{R.W. Bailey - Chief Engineer} [Handwritten initials: BY] | ||