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).
Final specification details for the Large Bore Bentley engine.
| Identifier | ExFiles\Box 90\5\ scan0063 | |
| Date | 6th September 1935 | |
| To RHC.{R. H. Coverley - Production Engineer} X164 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}17/KW. 6.9.35. Large Bore Bentley. Referring to the specification Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}34/KW. 3.9.35, which we handed to you, having considered this we think that we can now give you a final specification for B-18 as it will have to go to France if it is to be ready in 10 days' time. Crankcase. Stiffened type with spread stud centres, 20/25 dynamo speed, geared starter motor, Hall's metal bearings with white metal clearances. Crankshaft, Spring Drive & Timing Gears. Standard. Connecting Rods. EB.2374. EB.2220/2, with connecting rods bolts in S/ZNCR, to Hs.{Lord Ernest Hives - Chair}2104 - Hs{Lord Ernest Hives - Chair}/Smth.1/KW. 4.9.35. Pistons. Aerolite with strengthened gudgeon pin bosses. Carburetters. Large carburetters to be handed to you by CTS.{C. Trot Salt - Carburation}, to be fitted with a flange to take the air intake silencer Hs.{Lord Ernest Hives - Chair}2105 and suitable controls. Air intake Hs.{Lord Ernest Hives - Chair}2105 required. The induction pipe will be the same as fitted to Hall's car, a spare of which can be obtained from CTS.{C. Trot Salt - Carburation} Cylinders. Head, Ex.18392. Exhaust Valves - 3 stellited silichrome, and 3 stellited KE-965. Block to Ex.18393. Oil Pump. Ex.11936/41. Straight tooth large pump. | ||