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).
New crankshaft with four balance weights and a stiffer rear flange for the Phantom II Chassis.
| Identifier | ExFiles\Box 14\2\ Scan105 | |
| Date | 20th March 1931 | |
| RECEIVED 21 MAR 1931 To RHC{R. H. Coverley - Production Engineer} c. Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer} 87010 BY/CS1/EH.20.3.31. PHANTOM II CHASSIS. Crankshaft with Four Balance Weights and Stiffer Rear Flange for Flywheel. Crankcase & Bearings - Sec: 5000. Crankshaft - Sec: 5010. Please receive herewith blueprints of the following drawings detailed to LeC.2874. Sec: 5000. E.82140/1 Crankcase End Cover which replaces E.78777/8. Sec: 5010. E.82136 Crankshaft which replaces E.79738. E.82137 Crankshaft Balance Weight E.82138 Stud (Balance Weight) E.82139 Stud (Crankpin Oil Caps) which replaces E.79338. Will you please instruct up the above parts to be produced as required together with the following standard parts:- Sec: 5000. Remainder of parts to complete this section are standard to L.O.P. E.78560. Sec: 5010. E.70258 Oil Cap (Crankpins) 12 off which replaces E70259. E.70266 Nut (Crankpin Oil Cap) 6 " " " E70268. E.70267 Nut( " " ) 6 " " " E70269. E.78996 Lock Washer (Balance Weights) - 8 off. K.4010 Nut (Balance Weights) - 8 " K.4853 Taper Pin (Balance Weight Studs) - 8 off. Remainder of parts to complete this section are standard to L.O.P. E.79739. We have called for the Crankshaft to be produced in Nitralloy as requested by Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} It should be noticed that a new forging will be required for this crankshaft. When assembling Balance Weights, the chamfered side should be nearer the crankshaft bearings in each case to give clearance with webs in crankcase. contd: | ||