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).
Required modification for petrol tanks with outside fillers on two specific cars to resolve fuel leakage from the breather pipe union.
| Identifier | ExFiles\Box 17\5\ Scan221 | |
| Date | 14th March 1934 | |
| COPY. X7460 To Hs.{Lord Ernest Hives - Chair} from E/Lid.{A. J. Lidsey} E/Lid.{A. J. Lidsey}1/HP.14.3.4 c. By.{R.W. Bailey - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} Petrol Tanks with Outside Fillers. We have now two cars fitted with petrol tanks having outside fillers, viz: Vulture and 2-B-IV (Bn{W.O. Bentley / Mr Barrington}'s car). Both these tanks have sealed filler caps and separate air vents. The type of air vent on both tanks is the same and consists of a pipe connected to the air release tunnel on the top of the tank and lead away to a point at the rear of the body; to be effective the breather pipe has to be taken to a point in the body higher than the top of the petrol filler cap before it is lead away to the rear. It appears that it is an impossibility to arrange the pipe in the body to meet these requirements without utilising a portion of the luggage space. In order to overcome this will you please arrange to have the breather pipes removed from both cars, sealing up the union connection on the air release tunnel. The breathing should then be catered for by fitting the protected ventilator shown on F.86074 on a suitable boss as near the top of the filler as possible; a small protecting sheath should be fitted to the insider of the filler as on the present P.II. Probably a Phantom II piece can be used. A drawing is not being issued to cover this because there are only these two tanks affected and at the moment there is no prospect of the outside filler being required on the Bentley car. This modification is required on 2-B-IV urgently because the Coachbuilders have omitted to fit the breather pipe entirely, and petrol is leaking from the union continuously. E/Lid.{A. J. Lidsey} | ||