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).
Test results on three separate chart recordings.
| Identifier | WestWitteringFiles\L\2April1924-June1924\ Scan79 | |
| Date | 15th May 1924 guessed | |
| Section 1: Nu-Felo (118) 122lbs 60 a.h. 31-1-24 9.5 hours Average amperes = 6.71 Ampere hours = 63.7 .52 a.h per lb. 1.80w esternal Section 2: 29 16-4-24 114 Alklum 60 93.5 lbs 60 a.h. Average amperes = 6.62 Hours = 8.25 Ampere hours = 54.6 .584 a.h. per lb. 1.80w enternal Section 3: 23 11-4-24 135 Alklum RR50 81 lbs 50 a.h. Average amperes = 6.67 Hours = 7.83 Ampere hours = 48.9 .607 a.h. per lb. 1.80w esternal | ||