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).
The performance tests of Exide & P & R batteries for the 40/50 HP chassis.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 62 | |
| Date | 2nd February 1927 | |
| To R.{Sir Henry Royce} from EFC. c. RJ. PN.{Mr Northey} E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} Wor.{Arthur Wormald - General Works Manager} EP.{G. Eric Platford - Chief Quality Engineer} c. By.{R.W. Bailey - Chief Engineer} Roy.{Sir Henry Royce} Wd.{Mr Wood/Mr Whitehead} 40/50 HP. CHASSIS. EXIDE & P & R BATTERIES. We are issuing low and high rate discharge curves of present standard batteries, after running 13377 and 8231 miles on chassis in addition to a good deal of bench work. These curves are for two batteries only, designated S2 and SX, and are typical of the output performance of standard batteries after 10,000 to 15,000 miles running on chassis. Both of these are sandwich batteries and are made up entirely of present standard cells ( Exide and P & R cells being sandwiched in each battery), with the exception that in the SX battery two of the Exide cells are experimental with the small grid bars having apices facing inwards instead of outwards. This, however, has practically no effect on the general result, which, as stated, is typical of the entirely standard batteries. Reports of the tests on the two batteries, Nos. 155 and 159, are contained in my assistant's reports JC.74/5 copies herewith. Both low and high rate outputs may be considered very good and the consistency with which cells of both makes finished their discharge practically together, and also with which the positive elements first shewed weakness on the low rate discharge, and the negative elements first on the high rate discharge, as would be expected from the principles on which such cells work, is a very satisfactory indication of the proper performance of the batteries. CERTIFICATE OF INSPECTION Contd. | ||