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).
Modifications to a tank unit and air line to resolve an issue with petrol leakage.
| Identifier | ExFiles\Box 44\4\ Scan122 | |
| Date | 19th July 1929 | |
| W.A.Robotham, Esq., Date 19.7.29. Page 2 time as the goods. The standard set of tank unit and air line should first of all be fitted, and if he still has trouble, the red unit can be substituted for a few days' trial. The difference between the standard unit, (which is ordinary standard finish), and the red unit, is that the latter has two baffles in the pressure balance bell. If you will recollect, at the time that you previously experienced the trouble of petrol getting into the pressure balance air line, due on that occasion to a leak in the instrument, I suggested that the effective capacity of the bell could be increased by fitting a second baffle at its lowermost end. This I have done in the red unit. Personally, I do not believe that petrol can enter the pressure balance air line unless there is a leak, but to make assurance doubly sure, the second baffle will increase the bell capacity. If he still has trouble, under the arduous French conditions this hot weather, it is worth while trying it, unless of course the fitting of the complete new set gets him out of his difficulties. | ||