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).
Details on the assembly of a B.20 unit to replace an O.H.C. unit, and a list of running reports for other units.
| Identifier | ExFiles\Box 155\2\ scan0089 | |
| Date | 19th April 1937 | |
| -3- Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} 10/AP.19.4.37 B.20. Unit now being assembled as follows to replace O.H.C. on the bed. Crankcase with external strengthening channels and crankcase to suit. 4 bolt fixing of the rear main bearing, otherwise a std. unit. To be run on the bed preparatory to going in chassis including running in and power curve. Check ½ torsional crank periods. Gears to be quietened. --------- General. 1. Report of running of B.17 Unit. 2. " " " " B.24. " 3. " " " O.H.C. B.23. Unit. Rm {William Robotham - Chief Engineer} /Swdl. {Len H. Swindell} | ||