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).
Correct specific gravity of acid for a Chloride 6 BXE 5 Battery.
Identifier | ExFiles\Box 26\2\ Scan083 | |
Date | 10th January 1920 | |
H S 235 a (100 T) (S/F/ 846 6-8-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2460. PN{Mr Northey}/7/DB{Donald Bastow - Suspensions} 10.1.20. From P.N. to E.P. C. to C.J. With reference to your EP{G. Eric Platford - Chief Quality Engineer}/HS{Lord Ernest Hives - Chair}4/O24.12.19. attached Ck{Mr Clark}5/T23.12.19. re care of Chloride 6 BXE 5 Battery. Mr. Clarke states that the instructions on the Battery gives the density of the acid which should be put into the cells when dry as 1320, although in practice he is instructing the acid to be 1250 only, this condition being set out on the label which you recently sent to me, whilst at the present time the Chloride Company state that they consider the acid should be of the specific gravity of 1350. I am quite aware that an excessively high density of acid is harmful to plates, but one can generally take it that the Battery Maker when giving instructions keeps such facts as this in mind, with a view to avoiding the harmful tendency referred to. I cannot see that in the face of the Battery Maker's instructions, it is wise to use one density of acid throughout simply because it is more trouble to break down the acid of the degrees required; it should be quite simple to order an acid of 1350 s.g. and at the same time some carboys of distilled water for breaking down purposes. With regard to the question as to the desirability of giving a discharge to cells which are being got into suitable condition, this is really more a matter to be decided by your Local Convenience; obviously, the discharge and subsequent Contd. | ||