Design and development of a petrol gauge for the car's fuel tank.
| Identifier | ExFiles\Box 75\2\ scan0052 | |
| Date | 28th January 1920 | |
| To Bn. {W.O. Bentley / Mr Barrington} from R. {Sir Henry Royce} Copy to CJ. " " Da. {Bernard Day - Chassis Design} " " Hs. {Lord Ernest Hives - Chair} " " PN. {Mr Northey} X.3882 R1/G28.1.20. X.3882. RE PETROL GAUGE ETC. ON THE FUEL TANK OF CAR. (Device to determine suitability of Scale) (for proposed petrol lever indicator) I have spent a considerable amount of time in attempting to make the petrol gauge on the back tank of the car sufficiently good, and to fill all the conditions:- (1) Pressure feed tank. (2) Centrally fixed so as to be accurate. (3) Can be seen when luggage or spare wheels at back (4) Not get out of order. We have at the moment abandoned this, leaving it to you to fit the best that can be purchased. I send you a somewhat incomplete drawing of the one we have designed, but I consider that the cost and the undesirable amount of mechanism within the tank makes this as it stands, prohibitive. X.3691. A long time ago I heard of a suggestion of telling the amount of petrol in the back tank by the difference of air pressure required to make air enter the tank below the level of the liquid. of this idea, the principle of which is well known, and I am not sure that the application would be found suitable, but I should be pleased if you would make a few experiments to find if it would give any useful results. We also enclose side filler design. I shall be pleased if you and Mr. Day can shew us how the gauge can be made simply and yet thoroughly well. Mr. Elliott has suggested that a mirror might be fixed so that ordinary inexpensive, exactly fixed gauge could be read from the side. Do you think this would be satisfactory? Kindly send blue or photostat of the West Wittering(Henry Royce's home town) drawing enclosed. Rec. 1195 attached. to BNs copy. R. {Sir Henry Royce} | ||
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).