Extract detailing proposed alterations to a petrol tank to improve filling speed and level indicator visibility.
| Identifier | ExFiles\Box 154\3\ scan0110 | |
| Date | 3rd June 1921 | |
| R.R. 285A (100 T) (S.H. 798/10-12-20) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2947 X.3687 X.3764 Extract from OY1/G3.6.21. (17) PETROL TANK. X.3687 The tank fitted on 4.EX is shown on attached blue print XA.552 and a further print is enclosed A.552 showing proposed alterations. The tank on 4.EX is found satisfactory except that - (1) The level indicator is somewhat obstructed by the rear grid fitted on American luggage carriers. (2) The side filler is slow in admitting the last 3-1/2 gallons because of the slow escape of the trapped air. The alterations of A.552 are designed to overcome these troubles. The filler on this revised scheme is situated on top of the tank at one end. The tank should therefore fill very quickly. The level indicator faces upwards at an angle and is therefore visible when luggage is on the carrier. The glass being inclined, rusting of the needle from drops of water hanging on the glass will not occur. (This is the chief trouble with a horizontal glass). No inlet filter is fitted on 4.EX, but a large outlet filter is used which is washed by the surge of gasoline in the tank. This is built on a central brass tube and can be extended upwards to any desired extent in order to gain area. We think, however, that the area of delivery filter at present on 4.EX is sufficient. The new design of filter has the inlet far enough back to amply clear the longest standard body we are fitting. If any customers want to use extra long bodies we think it better to make them pay for a special design of tank rather than put through a less satisfactory design for the sake of taking longer bodies than standard. (At least 90% of American cars will have our own standard bodies.) 4.EX tank can be filled with 20 gallons in one minute. OY. | ||
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).