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).
Testing procedures and supply of Bentley oil pumps to Paris.
| Identifier | ExFiles\Box 149\2\ scan0150 | |
| Date | 24th March 1937 | |
| 1265 RHC.{R. H. Coverley - Production Engineer} from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} c. RHC{R. H. Coverley - Production Engineer}/HS.{Lord Ernest Hives - Chair} c. RHC{R. H. Coverley - Production Engineer}/Mr. Tuxford. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}4/R.24.3.37. BENTLEY OIL PUMPS - Lec.4288. In reference to your memo RHC{R. H. Coverley - Production Engineer}/HS{Lord Ernest Hives - Chair}9/FH.23.3.37 with regard to our checking the 30 Bentley pumps which are to be supplied to Paris, the difficulty is that it necessitates breaking down other jobs which are tested on the same rig. However if your rig cannot be got ready in time to test out these pumps, the job can be done here, pro-viding the pumps are handed to us in batches of six, which is to be the supply per week to Paris. In this way the "hold up" of the rig for other jobs would be minimised. Although rig testing of pumps is not abso-lutely necessary, it does ensure that the pump is satisfact-ory before being fitted to the engine and covers. (a) Gear Noise (b) Leaks (c) Priming ability (d) Pressure at which the relief valve opens. (e) Delivery curve. Whether you decide to rig test or not the pro-duction pumps, we send herewith a description of the test and the rig also the delivery curve Rm.{William Robotham - Chief Engineer}343 for these pumps. Rig Tackle. This consists of a variable speed motor which drives the pump, the suction pipe being taken from a standard Bentley sump complete with strainer. The pump is at the same relative level to the sump as when mounted on an engine, and the suction pipe is the same length as standard. The delivery pipe returns the oil to the sump and the pressure, controlled by a tap in this pipe, the gauge being between the pump and the tap. A pipe is attached to the relief valve union and returns to the sump, a tap being fitted in this pipe. Priming. With cold oil 15°C - 25°C and the pump running at 200 - 250 priming and consequent delivery to commence in 7 - 10 secs. | ||