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 for engine units number 10, 11, and 12.
| Identifier | ExFiles\Box 155\2\ scan0142 | |
| Date | 6th September 1937 | |
| 4. Unit No.10 continued. Std. pistons with L. section 2nd. comp. rings and high press. scraper rings. Rm.{William Robotham - Chief Engineer}241 deturbulated 4 port heads 6.5 : 1 C.R. with oil drain pipes. Standard camshaft. KE.965 (Stell. Exh.) valves not strengthened type. Up-to-date rocker lubrication. Modified tappet filter LeC.530. Unit No.11. (36-MX.{John H Maddocks - Chief Proving Officer}) Production (std) crankcase. Strengthened blade rods LeC.4913. Gasked (std.) cylinder liners. Std. pistons with Bentley type of high effy. scraper rings EB.2686. Std. cylinder heads 6 port with hydraulic mechanism. Increased starter motor ratio 15 1/4 to 18 1/4. Increased inertia flywheel N.Sch.4571. Unit No.12. To be assembled for torsion tests with Summers indicator. Std. production crankcase. Std. crank with special grinding for indicator. Std. W/M main and big end bearings also std. connecting rods. Proposed std. camshaft for non hydraulic tappets LeC.5401. No. 1, 2, and 3 tappet blocks std. tappets No. 4, 5, and 6 tappet blocks nm plated tappets in S/ZN cloudburst. A.{Mr Adams} side tappets with bottom springs E.88300, B side without. Solid rocker gear LeC.5441 with oil feed to suit LeC.5444. Rm.{William Robotham - Chief Engineer}380/1/2 modifications to rocker oiling Single valve springs A.{Mr Adams} side EB.3256 swedish wire. B. side Rs.{Sir Henry Royce's Secretary}540 with Rm.{William Robotham - Chief Engineer}400 top washers. 4 port heads and induction system. E.88447 latest KE.965 valves with solid stem inlet valves E.88782. Continued | ||