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 parts and specifications for various engine units.
| Identifier | ExFiles\Box 161a\1\ scan0018 | |
| Date | 19th July 1939 | |
| -5- Bentley 80 Engine Units - contd. No.6. New Unit in accordance with specification issued in HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel}1/BA.31.3.39. The main items consisting of, 1. EB.4670 Crankcase T.H. and Cylinders to suit 2.750 dia journals. 2. EB.4575 Crankshaft, with nose end to EB.4104 to suit original harmonic damper. 3. EW.2121 split skirt pistons. 4. EB.4098 Cylinder Head. 5. EB.4512 Camshaft. 6. Ex.33420 Solid stem exhaust valves. 7. EB.4835 Induction pipe to ECD.1298. 8. EB.4291/2 Exhaust Manifolds. 9. Rm.{William Robotham - Chief Engineer}576 Flywheel. 10. R.R.Ignition Distributor. Shardlows promise delivery July 19th. If Crankshaft comes to hand as promised we anticipate passing to test before the holidays. Information required from Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} re Valve Springs. No.7 New Unit required for Silver Dawn 60 Chassis No.33.G.VII. The following main items. 1. EB.4670 Crankcase T.H. and Cylinder. 2. EB.4575 Crankshaft, nose end to EB.4101. 3. EB.3916 Standard Aerolite pistons with tin plated rings as B.V. production. 4. Ex.29697 Connecting Rods. 5. EB.4098 Cylinder Head. 6. Ex.33420 Exhaust Valves - solid stem. 7. EB.4512 Camshaft. Anticipated date of completion 2nd week in August. Conventional 8 No.1 Unit. New Unit in accordance with specification in HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel}1/BA.4.5.39 the main items being. 1. EB.4600 Crankcase and Cylinders. 2. EB.4575 Crankshaft .4% Carbon steel. 3. EB.4740 Pistons - tin plated rings. 4. EB.4532 Cylinder Head. We are to give preferential treatment to the Alum Straight Eight before this unit. This does not mean we are to hold this unit up. continued. | ||