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).
Comparative tests on Dagenite & Lucas batteries for a Bentley car.
| Identifier | ExFiles\Box 164\2\ img046 | |
| Date | 20th May 1940 | |
| Ev.{Ivan Evernden - coachwork} from Rm{William Robotham - Chief Engineer}/RC.{R. Childs} Elect: 6021 Rm{William Robotham - Chief Engineer}/RC.{R. Childs}3/ML.20.5.40. COMPARATIVE TESTS ON DAGENITE & LUCAS BATTERIES. A Lucas battery, type 12-T X VW-9, was submitted by the Makers about July 1938, with a view to it being standardised on the Bentley car. In order to compare it with the existing battery, already on this car, a standard Bentley Dagenite battery, type 6 - HZD 9 - S was obtained which, together with the Lucas unit, was carried through a series of bench tests. The various measurements and tests which provided the basis of the comparison, were as follows : 1. Capacity at the 10 - hour Rate. Standard - 49 ampere hours. Given by the Makers. Lucas -> 60 " " Estimated from a discharge carried out on the bench. 2. Weight. Battery only, without lid{A. J. Lidsey} or securing bolts: Standard = 58 lbs. 13 ozs. Lucas = 63 " 0 " 3. Size. Dimensions taken over battery container only, and not including height of inter-cell links, terminal posts or lid{A. J. Lidsey} : Length. Width. Height. Standard = 11-13/16" 6-3/4" 8-1/4" Lucas = 11-3/4" 6-3/4" 8-1/4" 4. Starting Ability Test. In this test the batteries were discharged for 5 secs. at 280 amperes; which current approximately, would be required to turn the engine in extremely cold weather. The terminal - Continued - | ||