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 sheet detailing the components and modifications for Units 14, 15, and 16.
| Identifier | ExFiles\Box 155\2\ scan0144 | |
| Date | 6th September 1937 | |
| 6. Rm{William Robotham - Chief Engineer}/Swd1.12/WH.6.9.37. Unit No.14. continued. R.R. type of semi split pistons. inc. inertia flywheel Rm.{William Robotham - Chief Engineer}403. Clutch plate with thermoid facings. Ru.540 springs are used with Rm.{William Robotham - Chief Engineer}400 top washers. Springs marked red are coiled on small machine, springs marked blue coiled on std. machine. All springs in Swedish wire coiled at R.R. Oil temperature regulator deleted. A.C. filter feed from high press and return to rocker feed. Magnesium lower half. Thin section rocker covers and wheelcase. Close grain Fabroil idler wheel. Unit No.15. (38-EX.) Standard production unit other than Rm.{William Robotham - Chief Engineer}227 clutch with increased width clutch facings. Unit No. 16. (35-EX.) Std. production crankcase. Hykro crankshaft with extra hole in the journals. W/M main and big end bearings. Connecting rods with modified panel milling Lec.5330 and modification to bolt recesses Lec.5295. Cadillac damper with increased inertia ring. Lec.5415 rubber joint ring under top flange of liners. Cylinder liners A.1 and 2 Hepworth and Grandage. A.3 and 4 Std. Sheep. A.5 and 6 Brit. Piston Ring Co. B.1 and 2 B.3 and 4 Std. Sheep. B.5 and 6 Hepworth & Grandage. Cheap flap valves in lower half Lec.5313. 4 port cylinder heads with solid rocker gear Lec.5441 with oiling Lec.5444. Strengthened exhaust valves E.88447. KB.965. Solid stem inlet valves E.88782. S/SLV. Std. Bentley RB.{R. Bowen}175 springs. Lec.5461 modified core hot box. Camshaft E.88760 to suit solid rockers. Fine grain Fabroil idler Cork oil level float Lec.5506. Std. production flywheel and clutch. Rm{William Robotham - Chief Engineer}/Swd1. | ||