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).
Graph of intermittent high-rate discharge curves for various car lighting and starting batteries.
| Identifier | WestWitteringFiles\D\May1920\ Scan64 | |
| Date | 3rd May 1920 | |
| AMPERES DISCHARGE INTERMITTENT HIGH RATE DISCHARGE CURVES OF VARIOUS CAR LIGHTING AND STARTING BATTERIES All batteries were discharged through the same circuit of constant resistance .0763 ohm. The full curves correspond to 15 seconds on contact, 15 seconds off. The dotted curves correspond to 15 seconds on contact, 45 seconds off. MINUTES OF CONTACT Curve Labels: WILLARD S.J.R. 27 (82 1/2 lbs) CHLORIDE 6BXE 5 (e) (82 1/2 lbs) CHLORIDE PHR 7 (90 1/2 lbs) TUDOR R.{Sir Henry Royce} 7.1. (77 lbs) Circled numbers on curves: 18, 27, 30, 33 Batteries 18, 27, 30, 33. SHEET E.{Mr Elliott - Chief Engineer} X. 664 E.F.S. 3/5/20 | ||