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).
Forwarding a note from Hancock detailing a petrol boiling issue with the A.C. Petrol Pump during testing in France.
| Identifier | ExFiles\Box 27a\2\ Scan048 | |
| Date | 4th July 1931 | |
| 82677. To Roy.{Sir Henry Royce} From Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c. to Sg.{Arthur F. Sidgreaves - MD} E c. to Or. Da.{Bernard Day - Chassis Design} c. to By.{R.W. Bailey - Chief Engineer} We have received the following note from Hancock concerning the A.C. Petrol Pump now being run in France :- Re. the A.C. Petrol pump. "We are experiencing boiling trouble with the pump arrangement. We have led the feed pipe along the channel frame then up to the pump at right angles. We do not experience any trouble with this arrangement whilst the car is in motion as the flow of the petrol is sufficiently cool to keep it from evaporating, but after driving approximately 80 M.P.H. and coming to rest momentary, no petrol will come through for a few seconds, meanwhile the car spluttering along, once the petrol is drawn through the pump, it is O.K. The symptoms are, the pump getting too hot evaporates the petrol inside which opens the valve, this can be heard pulsating. We believe it is the valve under the air bottle. It destroys the vacuum and prevents the pump from functioning. We have cured it each time by unscrewing the air bottle and allowing the gas to escape. We should have thought that the position of the pump was in the coolest place. We do not get the fault stated above without driving at 70 to 80 MPH. maximum heat generated." Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||