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).
Issue with petrol vaporisation in the feed pipe on a Phantom chassis and proposing a solution.
| Identifier | ExFiles\Box 135\2\ scan0101 | |
| Date | 23th October 1923 | |
| To DA.{Bernard Day - Chassis Design} from Hs{Lord Ernest Hives - Chair}/GWH.{George W. Hancock - Head Chateauroux} X3701 c. to BY.{R.W. Bailey - Chief Engineer} Hs{Lord Ernest Hives - Chair}/GWH{George W. Hancock - Head Chateauroux}1/LG23.10.23. GAS GENERATED IN PETROL FEED PIPE FROM AUTOVAC TO FILTER ON PHANTOM CHASSIS X8510 WITH CAST DASH. We have, with this system, every sign of the petrol being heated up too much before it reaches the carburetter via the filter. When the engine becomes a normal heat, it has been noticed that a stream of bubbles enters the filter and at times there is so much of this gas that the top of the filter is filled by it. The gas is generated in the petrol feed pipe from the autovac to the filter, the cause being its nearness to the exhaust pipe. We have proved this by lagging the petrol pipe, when 80% of the bubbles disappeared. To overcome this trouble we would suggest that the petrol cock be moved from its present position and fitted to the end of the tank, a hole large enough being made in the dashboard. The petrol pipe would then run down the inside of the dash and underneath to the filter thus being kept as far as possible from the heat of the exhaust pipe. This scheme would clear up what is now an inaccessible job. Hs{Lord Ernest Hives - Chair}/G.W.Hancock. | ||