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).
Comparison of data for a 12-cylinder Lincoln engine.
| Identifier | ExFiles\Box 126\3\ scan0029 | |
| Date | 3rd January 1936 | |
| Hs{Lord Ernest Hives - Chair}/FD.{Frank Dodd - Bodies}15/KW.3.1.36. Ph.III. 12-Cylinder Lincoln Data. Bore and Stroke 3.125" x 4.5" Horse Power - B.H.P. 150 165 R.A.C. Rating 46.8 50.7 Tyre size 7.00 x 18 (V-12 - 136") 7.50 x 18 (V-12 - 145) Valve lift .3125" Diameter of valves 1.6875" Valve stems .3125" dia. Valve seat angle 45° Carburetter - Stromberg type E.E. dual downdraught. Piston displacement 414 cu.ins. 448 cu.ins. Compression pressure 136 lbs. Compression ratio 6.1 : 1 6 : 1 Crankshaft main bearings (4) No.1, dia. 2.625", length 1.875" " 2, " " " 1.625" " 3, " " " 1.625" " 4, " " " 3.5" Total length of main bearing surface 8.625" Overall length of crankshaft 34.5" Connecting rod bearing 2.5" dia. 1.00" width rods side by side individual bearings. Piston rings - 2. .125" compression and 2. .1563" oil seal, all above gudgeon pin. | ||