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 modifications and component specifications for various engine builds, including Unit No.16 (35-EX).
| Identifier | ExFiles\Box 155\2\ scan0182 | |
| Date | 20th December 1937 | |
| -9- ROCKER gear to LeC.5441 and lubrication LeC.5444 with modifications Rm{William Robotham - Chief Engineer}/380/1/2. Modified bottom tappets without springs LeC.5667 (these if possible). Cylinder liners A.1,2, and 3. Std. Sheepbridge. A.4,5, and 6. R.R. cast iron. B.1,2, and 3, Hepworth & Grandage. B.4,5, and 6, Brico. R.R. type semi split pistons. Increased inertia flywheel Rm.{William Robotham - Chief Engineer}403. Clutch plate with Thermoid facings. Rs.{Sir Henry Royce's Secretary}540 springs are used with Rm.{William Robotham - Chief Engineer}400 top washers. Springs marked red are coiled on small machine, springs marked blue are 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 Babroil idler wheel. Unit No.16 (35-EX). Std. production crankcase. Nykro 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 KE.965. Solid stem inlet valves E.88782 S/SLV. A side springs Rm.{William Robotham - Chief Engineer}260 - 1 - 6. EB.175 - 7 - 12. B side Blue EB.3256 1 - 6. Red. EB.3256 7 - 12. LeC.5461 modified bore hot box. Camshaft E.88760 to suit solid rockers. | ||