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).
The optimal oil viscosity for gearboxes to reduce noise and save power.
| Identifier | ExFiles\Box 75\1\ scan0066 | |
| Date | 9th April 1914 | |
| R.R. 285A. (150 H) (V.V. 782 27.3.14) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0442. COPY. COPY. To Wor{Arthur Wormald - General Works Manager}, for Hy.{Tom Haldenby - Plant Engineer}1514 Copy to Pd. Copy to J.{Mr Johnson W.M.} I shall be glad if you will come to some con-clusion as to what is the best viscosity of oil to use in our gear box to prevent the side sgaft being unnecessarily noisy. I have always thought that we have used too thick an oil, and that we fitted the gear box teeth too tightly. R.{Sir Henry Royce} We find thinner oil better also under load, and it should be better for changing gear, and saving a waste of power. I am much in favour of using an oil like Price's Motorine A all round the car for temperate climates it should be compounded with lard and possibly also some first pressing castor. F.H.R. [Left margin text] Xo-3 X528 | ||