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).
Bore measurement report for a 4¼-Litre Bentley CXB.277 engine at 27021 miles.
| Identifier | ExFiles\Box 146\5\ scan0214 | |
| Date | 3rd July 1939 | |
| 4¼-Bentley CXB. 277 Bore measurement at 27021 miles. As no carbon was removed or disturbed, the usual method of measuring above the lip for the zero could not be employed. Zero was taken at the bottom of the stroke of No.2 cylinder. ZERO -------- 3.5000" Readings as taken in thousandths of an inch Front Rear 1 2 3 4 5 6 Bottom of Stroke Parallel to crankshaft 0.0 0.2 0.0 0.3 0.0 0.0 Right angles to crankshaft 0.2 0.6 -0.5 -0.5 -0.6 -0.4 Below Lip Parallel to crankshaft 5.3 5.4 4.8 2.0 2.8 3.0 Right angles to crankshaft 2.1 2.4 1.6 2.4 2.2 2.2 ================================================================= True Readings in Inches Bottom of Stroke Parallel to crankshaft 3.5000 3.5002 3.5000 3.5003 3.5000 3.5000 Right angles to crankshaft 3.5002 3.5006 2.9995 2.9995 2.9994 2.9996 Below Lip Parallel to crankshaft 3.5053 3.5054 3.5048 3.5020 3.5028 3.5030 Right angles to crankshaft 3.5021 3.5024 3.5016 3.5024 3.5022 3.5022 ================================================================= | ||