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 accumulator manufacturers Peto & Radford concerning battery life and charging procedures for 8-FA-11 cells.
| Identifier | ExFiles\Box 61\1\ scan0067 | |
| Date | 15th January 1932 | |
| X74 SOCIETY OF MOTOR MANUFACTURERS & TRADERS Logo THE MOTOR TRADE ASSOCIATION Logo Manufacturers of P. & R.{Sir Henry Royce} Accumulators. ESTABLISHED 1889. PETO & RADFORD Proprietors:—Pritchett & Gold and E.P.S. Company, Limited. DIRECTOR SIR ARCHIBALD G.{Mr Griffiths - Chief Accountant / Mr Gnapp} GOLD. F.{Mr Friese} C. GRAHAM MENZIES. C. R.{Sir Henry Royce} D.{John DeLooze - Company Secretary} PRITCHETT G.{Mr Griffiths - Chief Accountant / Mr Gnapp} R.{Sir Henry Royce} N. MINCHIN. T. W. PRITCHETT WILLIAM PETO. LONDON OFFICE 50, GROSVENOR GARDENS. VICTORIA. LONDON. S.W.1. Please reply to the WORKS at DAGENHAM DOCK, ESSEX. Station: Dagenham Dock, (L.M.S. Rly. Tilbury Section). TELEPHONE No.: RAINHAM 34 (2 Lines.) TELEGRAMS: PETO RADFORD DAGENHAM YOUR REF................................ OUR REF KP/4........................ 15th January, 1932. RECEIVED 16 JAN 1932 Stamp Messrs. Rolls Royce Ltd., D E R B Y. FOR THE ATTENTION OF MR. H.E. WEST. Dear Sirs, With reference to the writer's visit to your Works on the 13th inst. and the conversation concerning the 8-FA-11 cells in the Electrical Laboratory, we would confirm our opinion that the life of approximately two years obtained from the positives is entirely due to unsatisfactory operating conditions and that a considerably longer life can be confidently anticipated if our suggestions as to modifying the charging arrangements are followed as closely as possible. To promote the successful operation of this battery it is necessary to employ the normal rate of charge as near as possible and the charging should be considered completed and be discontinued when the positive plates as well as the negatives have gassed freely for fifteen to twenty minutes. In conjunction with the foregoing it is recommended that the specific gravity towards end of charge be noted as this is a check in determining and limiting the excess input. It is important to remember that the employment of the normal rate of charge facilitates the observation and judgment of the free gassing stage. It is also confirmed that when the two new positive sections are supplied to your order, a | ||