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 specifications for engine components, including connecting rods, pistons, cylinders, and valves.
| Identifier | ExFiles\Box 6\6\ 06-page347 | |
| Date | 5th October 1937 | |
| -11- Rm.{William Robotham - Chief Engineer}1/RA.5.10.37. CONNECTING RODS LOP.EW.1437. Complete to the above LOP. already instructed to RHC.{R. H. Coverley - Production Engineer} Big-End Bearing Bush in AG.6 material with single hole feed to connecting rod. EW.1435/6 Connecting Rod and Cap. Detail dimensions of the crank and the bearing bush to give a diametrical clearance between the limits of .00175 and .00225. Nipping of the bushes in the rod to be included as recently adopted on Bentley bearings. PISTONS LOP.EW.1426. Complete to the above LOP, already instructed to RHC.{R. H. Coverley - Production Engineer} Compression ring grooves modified to Rm.{William Robotham - Chief Engineer}408. Compression rings to Rm.{William Robotham - Chief Engineer}446. Scraper rings EB.3122 High Pressure as used on Bentley. CYLINDERS LOP.EW.1379. Complete to the above LOP, already instructed to RHC.{R. H. Coverley - Production Engineer} Solid cast block to LeC.5778 and E.C.D.80. Cylinder head incorporating the modified coring to LeC.3684. Pedestal bosses moved to suit altered rocker ratio E.C.D.9. VALVES & FITTINGS. LOP.EW.1427. Complete to the above LOP, already instructed to RHC.{R. H. Coverley - Production Engineer} (a) Bottom tappets in cast iron with "chilled" face to E.C.D.50. - Use material supplied by C & B Smith, Wolverhampton. (b) Push Rods to suit above tappets E.C.D.50. continued | ||