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).
Bench tests for an S2 battery (155) removed from chassis 8-EX after 13,377 miles.
| Identifier | ExFiles\Box 54\2\ Scan112 | |
| Date | 16th February 1927 | |
| EFC. {E. Fowler Clarke - Electrical Engineer} JC.74. RE TESTS ON S2 BATTERY (155). This battery was removed from chassis 8-EX for bench tests to be taken after having run 13,377 miles. On low rate discharge through a constant external resistance of 1.80 ohm, 64.0 ampere-hours were realised, and all cells shewed positive weakness on the cadmium test. Following a full charge a high rate discharge through a constant external resistance of .100 ohm was taken. Initial amperes = 109.0 Time to 104 " = 7.5 mins. " " 100 " = 12.2 " " " 90 " = 15.2 " " " 80 " = 18.0 " All cells shewed negative weakness on the cadmium tests. On both the above tests the Exide cells were slightly better in capacity than the P & R cells. EFC {E. Fowler Clarke - Electrical Engineer} /G.Johnson. | ||