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).
Engine inspection report for Chassis B.27.LE, detailing bearing measurements and oil flow tests.
| Identifier | ExFiles\Box 160\3\ scan0105 | |
| Date | 19th January 1939 | |
| To Bentley Motors Ltd. Derby................Rm.{William Robotham - Chief Engineer} Levallois, Sr/VA.I/HB.{C. E. Harcombe}19.1.39 re: Chassis B.27.LE - Mr EMBIRICOS (Paulin Streamlined) Mileage: 12.514 miles We dismantled the engine of this chassis for inspection of the bearings and oil pipes. On the 12.12.38 at 10.763 miles, we carried out oil flow tests of the bearings, as follows: First Test: Temp. of engine case 45° Time taken to pass one gallon of C.W. oil 5m 48 Second Test: Temp. of engine case 40° Time taken to pass one gallon of C.W. oil 6m 02 --- Crankshaft: 1 2 3 4 5 6 7 Main journals: Max. dia. : 2.248" 2.2475" 2.248" 2.248" 2.248" 2.248" 2.248" Minim. dia. : .2475 .247 .247 .2475 .247 .247 .248 Ovality : .0005 .0005 .001 .0005 .001 .001 .000 Crankpins: The diameter of each pin was 1.9985" All journals of crankshaft in good condition. N° 6 main journal very slightly scored. Main Bearings: No sinkage in the upper half of crankcase (W/M bearing Sinkage in caps : .001" .002" .003" .003" .003" .002" .000" 1 2 3 4 5 6 7 Work carried out to main bearings: Fitted new liners to 1 to 6 bearings and stepped them as necessary in order to correct for sinkage in caps. We left from .003" to .0035" working clearance. Big-end Bearings: Surface OK. The average sinkage at each joint face of the upper and lower halves of the bearings was .0015". Fitted o/s liners to all big-end bearings and stepped them as necessary in order to correct for sinkage leaving a working clearance of .0025". All oil pipes including the 2 main oil tubes (E.55616/7) found to be OK. We measured the cylinder bores and attach our report. Sr/VA. [handwritten initial] | ||