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).
Modifications to the petrol pump on a 3.5 litre Bentley chassis.
| Identifier | ExFiles\Box 27a\2\ Scan187 | |
| Date | 9th June 1933 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} By.{R.W. Bailey - Chief Engineer} Da.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer} X2677 E.2/HP.9.6.33. Petrol Pump on 3½ litre Bentley Chassis. Replying to the proposals given in your memo Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}1/KT.3.6.33, the stronger pump spring has already been dealt with by us, and particulars furnished to By.{R.W. Bailey - Chief Engineer} With regard to the larger ports, these can be opened up to .312" as suggested. Present castings can be used up, but future castings should have extra metal added where necessary to guard against porosity. The valve lift can be increased from .060 to .100 as suggested, the difference being made in the length of plug. The dimension between the valve port and the valve seat is most important. Circular bakelite valves were used on the "metal bellows" type of petrol pump - LeC.2806, but the Experimental Department in their memo HS{Lord Ernest Hives - Chair}/Lov.{Mr Lovesey}2/KT.12.3.31 said that the results with these valves were inconsistent, and a great improvement was found with ball valves. We think, however, the circular valves of the diameter mentioned, i.e. .475", should be a definite improvement over the hexagon type, and see no reason why they should not be adopted. E.{Mr Elliott - Chief Engineer} | ||