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 responding to concerns about a slotted oil control ring not bedding-in correctly.
Identifier | ExFiles\Box 148\3\ scan0398 | |
Date | 27th September 1938 | |
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 2439 BIRMINGHAM 143 SUFFOLK STREET TELEPHONE: MIDLAND 0638 MANCHESTER 232 DEANSGATE TELEPHONE: BLACKFRIARS 5928 NEWCASTLE MILLICAN'S BUILDINGS, MARKET ST TELEPHONE: 23874 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 OUR REF FB/EHF.09419 SERVICE DEPOTS LIVERPOOL 45 RENSHAW ST.{Capt. P. R. Strong} TELEPHONE: ROYAL 5786 LEEDS 82 WOODHOUSE LANE TELEPHONE: 25774 CROYDON 246 HIGH STREET TELEPHONE: 6121-2 SOUTHAMPTON 2 PORTSWOOD ROAD TELEPHONE: 74776 HULL 285 ANLABY ROAD TELEPHONE: 15312 CANTERBURY 21 & 22 ROSE LANE TELEPHONE: CANTERBURY 2456 TELEPHONE: LYMINGTON 520 (5 LINES) TELEGRAMS: WELLWORTHY CODE: MARCONI YOUR REF Rm{William Robotham - Chief Engineer}/CTS.{C. Trot Salt - Carburation}5/JH. Handwritten: 1256. Handwritten: Oil Consumption file. Handwritten Signature 27th September, 1938. Messrs. Rolls Royce Ltd., Derby. Dear Sirs, Attention of Mr. Salt. We thank you very much for your letter of the 23rd inst., and for the slotted oil control ring which is the subject of your letter. We regret to note that this ring has not bedded-in as might have been expected, considering it must have run some few hours in an engine. This matter is being taken up with our Works and Inspection Department to obviate a recurrence of your receiving such rings. Taking the various points you have raised in the order in which you have placed them - (1) We would say that practically no ring can be put out of shape by bending manually, and in assembling over the piston no appreciable distortion takes place which would in any way affect the running of the ring. (2) Distortion by rough handling would not account for the uneven bedding which was noticed on the ring you returned, this being purely a machine-shop problem. (3) We agree that reducing one land diameter would give increased unit pressure on the remaining land, but do you actually want high loading in the early stages of running-in which can cause scuffing of the ring and the cylinder bore. | ||