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).
Specification list for engine units numbered 6, 8, 9, and 10, detailing their components and status.
| Identifier | ExFiles\Box 155\2\ scan0141 | |
| Date | 6th September 1937 | |
| 5. Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}12/NH.6.9.37. Unit No. 6 continued. 4 ports cylinder heads. E.88447 RE.963 each valves (strengthened type) E.88165 Inlet valves S/SLV (Drilled up stems) Std. hydraulic gear camshaft. B side head working with hydraulic system and std. double springs. A side head with hydraulic motion deleted and single Rs.{Sir Henry Royce's Secretary}340 springs (Swedish wire, coiled at R.R. Rm.{William Robotham - Chief Engineer}400 top washers. Unit No. 8. Spare unit at present dismantled in shop. Obsolete crankcase. Long type liners prior to gashing. Std. connecting rods and pistons. "Continental" camshaft Ex.23245. Rs.{Sir Henry Royce's Secretary}2200 long centre clutch and heavy flywheel. Unit No. 9. (37.EX.) Standard production crankcase. Crank with extra opposite hole in journals. Std. W/M main brgs. and big end bearings. Std. connecting rods. Std. pistons with L section rings. 4 port cylinder with std. hydraulic tappet mechanism. Special material floating bushes as supplied, by Naylor. Modified tappet filter Lec.5530. Up to date Alum hot box Lec.5461. "General" bye pass filter. Lightened starting handle Lec.5610. Driven plate faced with VM.20 material. Unit No.10. (33-X.) Being assembled in readiness for fitting in the above chassis. Std. Prod. Crankcase. Lightened std. crankshaft (balance weights and w/bs{A J. Barnes - Assistant Manager}) Ex.24974/5 Alternative makes of liners. A.1 and 2, B.5. and 6 Hepworth & Grandage. A.3 and 4, B.3. and 4 Std. liners. A.5 and 6, B.1. and 2 British Piston Ring Col Continued. | ||