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).
Letter from a piston ring specialist discussing bearing failures and lubricating oil tests, including an extract from a letter from Dennis Bros.
| Identifier | ExFiles\Box 115\4\ scan0023 | |
| Date | 4th September 1939 | |
| SERVICE DEPOTS LONDON 89 BLACKFRIARS RD S.E.1 TELEPHONE: WATERLOO 5762-3 172 GT. PORTLAND ST.{Capt. P. R. Strong} W.1 TELEPHONE: MUSEUM 2433 119 LEYTONSTONE RD STRATFORD. E.15 TELEPHONE: MARYLAND 1666-7 BIRMINGHAM 143 SUFFOLK STREET TELEPHONE: MIDLAND 0638-9 MANCHESTER 232 DEANSGATE TELEPHONE: BLACKFRIARS 5914 NEWCASTLE MILLICAN'S BUILDINGS, MARKET ST TELEPHONE: 25575-6 ON ADMIRALTY, WAR OFFICE, AIR MINISTRY, INDIA OFFICE LISTS WELLWORTHY PISTON RINGS LIMITED PISTON & PISTON RING SPECIALISTS LYMINGTON HANTS WORKS & HEAD OFFICE: STANFORD RD SERVICE DEPOTS LIVERPOOL 75 PARADISE STREET TELEPHONE: ROYAL 5786 LEEDS 82 WOODHOUSE LANE TELEPHONE: 25774 CROYDON 246 HIGH STREET TELEPHONE: 6121-2 SOUTHAMPTON 17 PORTSWOOD ROAD TELEPHONE: 74778 HULL 285 ANLABY ROAD TELEPHONE: 15312 CANTERBURY 21 & 22 ROSE LANE TELEPHONE. CANTERBURY 2456 TELEPHONE: LYMINGTON 520 (5 LINES) TELEGRAMS: WELLWORTHY CODE: MARCONI DIRECTORS: G.{Mr Griffiths - Chief Accountant / Mr Gnapp} H.{Arthur M. Hanbury - Head Complaints} ALEXANDER J.{Mr Johnson W.M.} W. HOWLETT C. B. KAY P. WALDEN C. W. WATERS A.{Mr Adams} J.{Mr Johnson W.M.} WOOLCOTT OUR REF FB/CJR. Ext.26. YOUR REF 1020a 4th September, 1939. W. A.{Mr Adams} Robotham Esq., Messrs. Rolls-Royce, Ltd., Derby. Dear Mr. Robotham, I am giving below an extract from a letter received from Mr. Milne of Dennis Bros. in connection with the AC.9 bearings, and I sent him a copy of your letter in relation to the bearings which you had examined. His remarks are as follows:- "In connection with Messrs. Rolls Royce comment upon the condition of the big end bearings which you referred to them for inspection, it would be interesting if Messrs. R.R. could give us some indication as to why the big end bearings have suddenly commenced to move in the connecting rods. In the first series of tests they were perfect and the marks on the bearing surface were ideal. On the last test when clearances had not been modified, but then a change had been made in the lubricating oil, it is evident that a considerable amount of overheating had taken place. Should they be able to advise us from their previous experience that a change in the grade of lubricating oil used, would have such a marked effect upon the behaviour of the bearings, then we can endeavour to confine our tests to oils which have given best results on previous tests." Should you have any points to raise in connection with Mr. Milne's remarks we shall be very pleased to pass them on to him as in spite of the troubles he has experienced on e way and another, that is with the centre main bearings which ROLLS-ROYCE A.{Mr Adams} C. 9. BEARINGS ALUMINIUM CASTINGS LABORATORY TESTING CYLINDER LINERS & LINER CASTINGS | ||