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).
List of specifications and modifications for the B.60 Unit No.1 test bed development engine.
| Identifier | ExFiles\Box 155\2\ scan0259 | |
| Date | 11th November 1938 | |
| -4- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}9/JH,11.11.38. Up to date increased inertia Attwaters camwheel. Hardened crank and dynamo pinions. Hook up of induction system RCD.758 2 - 1 1/2" S.U. with auto starter carb. 'General' type oil filter. Delco distributor with spring drive. B.60 Unit No.1. (Test bed development). Unit as designed with exception of following Thick section big ends with keyed shims, No.1 2 and 3 exhaust valve seats cut directly in block. No. 4, 5 and 6 insert seats. Sodium cooled exhaust valves. RS.{Sir Henry Royce's Secretary}540 valve springs with Rm.{William Robotham - Chief Engineer}400 top spring washers. S/ZN camshaft and chill cast BZ/FC distributor drive. Mock-up Wraith and B.III indu. system. Cylinder head .070 machined off faces. Throat opened up to PD.292 top of bores opened up at throat. Comp ratio of above with .030 gasket 6.8 : 1. Extra .312 water holes in block and head. 5 in all adjacent No.1, 3, 4, and 6 bores. A.C. type oil filter. Main oil feed to distributor drive. gear, also mods. to banjo screw. | ||