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).
Material trials and proposed solutions for the water pump joint on various car models.
| Identifier | ExFiles\Box 149a\1\ scan0091 | |
| Date | 19th April 1937 | |
| [Handwritten] Water Pump - Bentley BY.2/G.21.4.37. 1264. [Stamped] Mr. Cox. c. Mr. H.I.d. c. Rm.{William Robotham - Chief Engineer} [Handwritten] (SJJ) Plenum for me GR{George Ratcliffe}? hR/ir Rm{William Robotham - Chief Engineer}/STD [Typed] WATER PUMP JOINT ON ALL CARS. --------------------------- Rm{William Robotham - Chief Engineer}/Std.9/AP.19.4.37. The proposal to use a Phantom 11 scheme of a gland on 25/30 and Bentley is in hand, but it is someway off. To meet the present difficulties the position is as follows :- (1). Klingerite has been tried some time ago at my instructions by Mx.{John H Maddocks - Chief Proving Officer} and turned down because he could not make the joint in the first place and maintain it on test. (2). We tried 'Dermatine' with two insertions to stiffen the joint, these also failed. (3). We instructed a hard rubber capable of resisting steam temperatures, as used on the Kestrel lower cylinder joint, 20 of these were handed to Mx.{John H Maddocks - Chief Proving Officer} and proved to be satisfactory. In view of the apparent success of the hard rubber D.T.Y.10 type, I have ordered three gross of these for the Test Department, and two gross for production as a temporary improvement. It is obvious that providing the rubber could be prevented from spreading out under the load, that is, it has a permanent resilience, no trouble will be encountered, the whole difficulty arises from the fact that 'Dermatine' spreads out under temperature and load, and re-moulds itself to a smaller thickness, the hard steam rubber will not do this. BY.{R.W. Bailey - Chief Engineer} | ||