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).
Modifying oil flow to prevent leaks and addressing valve mechanism noise.
| Identifier | WestWitteringFiles\S\September1928-October1928\ Scan174 | |
| Date | 18th October 1928 guessed | |
| -3- the greater capacity seems undesirable. As an alternative to reducing the pump capacity, the relief valve should be increased in size. A modification of the rocker shaft is being prepared, which will restrict slightly the oil flow to the push rods, and thus prevent the flooding of the rockers. It is proposed to reduce the oil supply to the timing gears in order to overcome the leak behind the fan pulley. The crankcase pressure has been ascertained, and found to be equal only to .45" head of water (.016 lbs/sq.") at 2500 r.p.m. It is thought very unlikely that this pressure is assisting the oil leak behind the fan pulley appreciably. Attention is now being directed to the prevention of the noise of the valve mechanism, as this is considered the most important of the troubles to be overcome. Hs.{Lord Ernest Hives - Chair} | ||