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).
Clarifying oil pressure readings for the S. I. Spectre model and the discovery of a failed journal bearing.
| Identifier | ExFiles\Box 91\4\ scan0220 | |
| Date | 23th August 1935 | |
| HOTEL DE FRANCE. CHATEAUROUX. Indre. France. GWH{George W. Hancock - Head Chateauroux}/2/JAB. 23rd August 1935. To. Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} From. G.W.H. 3. S. I. SPECTRECodename for Phantom III. In my memo of the 19th August, will you please point out to me where I mention 5 lbs. main oil pressure. I said plain enough that the pressure having dropped from 30 lbs. to 20 lbs. does not leave sufficient pressure to pass oil through the filter for the tappets, and the tappets do not receive sufficient oil. With the filter removed ( for the tappets) with 20 lbs. main oil pressure, we only get 2 lbs. pressure in the tappet supply pipe. The pressure was taken from the end of the tappet pipe line in the vee. Our Filter is a standard element star type. We shall have sufficient oil pressure now we have replaced N° 2 jurnal bearing, which at the time of reporting, we had no idea that it had failed. ------------ G.{Mr Griffiths - Chief Accountant / Mr Gnapp} W. H.{Arthur M. Hanbury - Head Complaints} | ||