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).
Investigation into cracking S.U. pumps, identifying over-tightening screws as the cause.
| Identifier | ExFiles\Box 106\2\ scan0175 | |
| Date | 6th April 1938 | |
| File To Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}... from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} c. RHC.{R. H. Coverley - Production Engineer} c. By.{R.W. Bailey - Chief Engineer} c. Rp. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}14/N.6.4.38. S.U. PUMPS. ---------- Kingsbury have called my attention to pumps received from the Works with the contact platform borken. It was obvious that the pumps in question had passed the test and were in good condition up to the time of packing, and in that respect no blame could be attached to the Works. I investigated how and why these breakages occur, and was able to break one after it had been placed on a table for approximately five minutes. The cracking is due to unduly tightening up of the two screws holding the contact platform on to the base, the design is such that this can be easily over-done, and the breakage does not occur until the unit receives a knock, or the platform fractures under the tension. A smaller screw driver may overcome the trouble, so that over tightening would be difficult. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||