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).
Letter to H.F. Hamilton discussing petrol pump delivery issues at high speeds, engine cooling, and experiments with 'Autoflux' pumps.
| Identifier | ExFiles\Box 91\3\ scan0004 | |
| Date | 25th June 1936 | |
| X300a 90 To H.F. Hamilton, Hotel de France, Chateauroux, Indre, France. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}26/KW.25.6.36. Thanks for your note of the 23rd. The question is, if you put the petrol pump on the frame will it deliver sufficient to keep the car going at high speeds. Will it deliver at all on a steep gradient? For maximum power you will require 180 pts/hr. <del>from the pipe feed into the float chamber when this is detached.</del> through the float chamber needle valve. We cannot put stronger springs in the petrol pumps; S.U's have tried it and the pumps burn out. We are doing some more experiments with the "Autoflux" but this is not made in England. If the pump will not do the job with the standard springs, will you see if there is any means of insulating it from the under bonnet temperature, which will improve matters. You might house it in a sort of box and run a vent from this to the outside of the bonnet. We note your observations re the water temperature boiling and should like to know under what conditions this occurs. We are sending you out a more effective fan but you will realise that the chances of improving the bonnet ventilation are negligible. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} Rm{William Robotham - Chief Engineer} to HFH{Hoppy F. Hamilton} at C. Where's George? | ||