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 Wellworthy Piston Rings discussing the failure analysis of AC.9 big end bearings with Leyland Motors and Rolls-Royce.
Identifier | ExFiles\Box 115\4\ scan0066 | |
Date | 13th May 1940 | |
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 SERVICE DEPOTS LIVERPOOL 75 PARADISE STREET TELEPHONE: ROYAL 5786 LEEDS 82 WOODHOUSE LANE TELEPHONE: 26774 CROYDON 246 HIGH STREET TELEPHONE: 6181-2 SOUTHAMPTON 17 PORTSWOOD ROAD TELEPHONE: 74778 HULL 285 ANLABY ROAD TELEPHONE: 15312 CANTERBURY 21 & 22 ROSE LANE TELEPHONE: CANTERBURY 2456 ON ADMIRALTY, WAR OFFICE AIR MINISTRY, INDIA OFFICE LISTS WELLWORTHY PISTON RINGS LIMITED PISTON & PISTON RING SPECIALISTS LYMINGTON HANTS WORKS & HEAD OFFICE: STANFORD RD 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/AS. Ext.26. YOUR REF TELEPHONE: LYMINGTON 520 (5 LINES) TELEGRAMS: WELLWORTHY CODE: MARCONI 13th May, 1940. G.S.Salt. Esq., Messrs. Rolls-Royce Ltd., Derby. Dear Mr. Salt, Confirming the visit of Mr. Plummer and the writer to your works on Thursday last when we discussed briefly the AC.9 big end bearings which had failed in service on a Leyland vehicle, we should appreciate a line from you at the earliest possible moment as to your opinion as to the cause of failure and also a report from your Laboratory regarding the material itself. We have this morning given Mr. Markland of Leyland Motors the opinions expressed by ourself, Mr. Lovesay and also by Mr. Warrington of High Duty Alloys and you may be interested to hear that the one opinion expressed by all parties, in which we are in agreement is that these bearings have operated under a dry condition and this has primarily caused their failure. Mr. Markland's reaction to this is that they quite agree that this is so, but that under like conditions white metal has not failed them and his view is that the AC.9, whilst doing all that is required of it on test bed does not, particularly during the cold weather of this last winter have sufficient margins of safety when starting up from cold to look after itself until oil is properly circulating. Incidentally they have revised the drilling of the crank-shafts and have drilled right through the crank-pins in the prescribed manner which I believe was suggested by your people to get the best results on this AC.9 material and further the oil pressure which these engines operate is 80 lb. per sq. inch. ROLLS-ROYCE A.C.9. BEARINGS ALUMINIUM CASTINGS LABORATORY TESTING CYLINDER LINERS & LINER CASTINGS | ||