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).
Carburettor improvements and solutions for an oil leak from the rear engine bearing.
| Identifier | ExFiles\Box 91\4\ scan0117 | |
| Date | 19th July 1935 guessed | |
| ( 3 ) We can devote all our time on the Carburettor job as soon as we have cleared up our present troubles. So far, we have improved the Carburettors for acceleration without an over-strong mixture, by reducing the capacity of petrol in the choke tube for slow and medium speeds, before the piston starts to lift. There was too much petrol being drawn up for the first kick of acceleration, decent slow running we have not been able to obtain. The Carburettors build up while running slow. A pair of Zenith Carburettors would save a lot of time. OIL LEAK FROM REAR ENGINE BEARING. I do not want any medals or stripes, we lose them too quick, but the oil leak from the rear bearing is 100% cured. It is so much cured, that lubrication will have to be provided for the needle bearings of the Clutch fingers in a very short time. The scheme can be fitted to all our car Engines, but the Engines will have to be better breathed, as we are forcing air into the Crankchamber. We are utilising the pressure of air at the periphery of the Flywheel, and taking it to the cavity where the felt originally was. We have fitted a felt to seal the annulus nearest the Flywheel, so that the air cannot escape through the wrong direction. After 1,200 miles of hard running, not one spot of oil has come through into the Clutch pit, whereas previously, it was drowned in oil. We have examined the Flywheel etc., and it is perfectly dry. --------- G.W.Hancock G.W.H. | ||