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 bench testing of an S2 battery (155) removed from chassis 8EX.
| Identifier | ExFiles\Box 54\1\ Scan231 | |
| Date | 16th February 1927 | |
| ROLLS-ROYCE LTD. INSTRUCTIONS. To: E.7.6. Order No.: J.C.74. Customer's No.: X4617S. Re Tests on S2 Battery (155). This battery was removed from chassis 8EX for bench tests to be taken after having run 13,377 miles. On low rate discharge through a constant external resistance of 1.80w, 64.0 ampere hours were realised, & all cells showed positive weakness on the cadmium test. Following a full charge a high rate discharge through a constant external resistance of .100w was taken. Initial amperes = 109.0 Time to 104" = 7.5 min " " 100" = 12.2 " " " 90" = 15.2 " " " 80" = 18.0 " All cells showed negative weakness on the cadmium tests. On both the above tests the Exide cells were slightly better in capacity than the P&R cells. Signed: G.J- | ||