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).
Cracking cylinder blocks on Bentley and 25/30 models due to the water pump inlet studs, with a suggested design alteration.
| Identifier | ExFiles\Box 103\2\ scan0121 | |
| Date | 1st February 1937 | |
| To E from Rm{William Robotham - Chief Engineer}/GWH{George W. Hancock - Head Chateauroux} c to By.{R.W. Bailey - Chief Engineer} c to RHC.{R. H. Coverley - Production Engineer} c to Rm{William Robotham - Chief Engineer}/Std. GW 1H Kingsbury, 1st February, 1937. Bentley and 25/30. Water Pump Inlet to Cylinders. There have been several instances when the cylinder block has been cracked at the positions shewn in the sketch, by the two studs which are screwed in to hold the inlet flange for the water pump. The holes come rather close to the edge and in screwing the studs into position the metal has cracked. This joint is also a source of water leaks at the bottom, between the joint faces. The design should be altered so that a counter-sunk screw could be inserted at the bottom as shewn. Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||