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).
Test results and analysis regarding temperature reduction and fuel starvation by repositioning a pipe outside the vehicle frame.
| Identifier | ExFiles\Box 149\4\ scan0305 | |
| Date | 31th May 1937 | |
| -4- Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems}6/JH.31.5.37. From the above tests in our opinion the position is very serious and we are liable to run into considerable trouble especially abroad. The placing of the pipe outside the frame should be of great assistance but not a guaranteed cure. A reduction of temperature with the pipe outside the frame is as follows AIR U.B. Inside frame outside in front of X member. 20 52 49.3 31.4 average for run. or a reduction of 17.9 °C. Air U.B. Inside frame Outside. Behind X member 19.4 51 40 31 average for run. or a reduction of 9°C. This should give a good improvement for high speed starvation but as the pump and a short length of suction still remains under the bonnet the temporary starvation after stopping will still exist and we can only expect a slight reduction in the time of partial starvation with the pipe outside. The only solution to the problem is a high pressure pump low down in the frame which would have less work to do and inspite of the extra power should be more silent. The Nairobi run has shown the success of this scheme and 32-EX is to run 10,000 miles similarly fitted with the exception of oil silk or neoprene in the diaphragms. The diaphragms on the Nairobi car has become slightly porous. A separate report on this will be issued. Rm{William Robotham - Chief Engineer}/J.B.Dixon. | ||