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).
The power unit of a Lincoln car, detailing crankshaft and engine specifications.
| Identifier | ExFiles\Box 173\1\ img317 | |
| Date | 12th February 1934 | |
| COPY OF REPORT FROM Rn.{Mr Robinson} IN U.S.A. DATED 1.2.34 To Sg.{Arthur F. Sidgreaves - MD} from Hn{F. C. Honeyman - Retail orders}/Rn.{Mr Robinson} c. to WoP. c. to BY.{R.W. Bailey - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} c. to Hdy.{William Hardy} Hn{F. C. Honeyman - Retail orders}/Rn.{Mr Robinson}9/KW.12.2.34. LINCOLN CAR. There is a considerable amount of interest attached to this power unit, particularly as they have this year changed from a seven bearing forked big end construction, to a side by side four bearing type. The four bearing shaft is fully balanced. The balance weights are forged integral with the shaft. The engine is now 3-1/8 x 4-1/2. Firing order 1-4-9-8-5-2-11-10-3-6-7-12 Angle between the cylinders 67° Crankshaft dimensions: Journal dia. 2.625" Pin dia. 2.5 Pin length 1.995 (less the 1"/rod.) Main bearings A - 1.625" long " B - 3.5" Front " C - 1.875" Distance between adjacent cylinders 3.8" approximately " 2 & 3, etc. 5.125" Over-all length of crank from flywheel flange to front of main bearing C 31.7" Finished crank weight 80 lbs. Worst period presumably 6/rev. without damper load (they have a fair hub) 2,200 R.P.M. | ||