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 of the final peak conditions of the charging circuit on a 20 HP chassis.
| Identifier | ExFiles\Box 51\2\ Scan200 | |
| Date | 8th December 1925 | |
| X4535 EFC. {E. Fowler Clarke - Electrical Engineer} AC.68. 8th Dec. 1925. X.4642. X.4338. X.4810. CHARGING ON 20 HP. CHASSIS CIRCUIT. A test of the final peak conditions obtaining on 20 HP. chassis charging circuits, similar to that reported in AC.66 of 1st inst. for 40/50 chassis has, been completed. Dynamo 1315 was used, being first set to the production specification; the output in test 5of which was 10.5 amperes (the upper limit) Three standard batteries were employed for the test, two being Exides and one P & R. {Sir Henry Royce} The results are shown in the table:- BATTERY NO. Cell Volts. Total Volts. 1 2 3 4 5 + 6 6XL3/4. 2.73 2.71 2.70 2.70 2.71 2.70 16.25 P & R TBD7/10. 2.97 2.95 2.97 2.95 2.95 2.95 17.72 6XL34/1. 2.80 2.80 2.75 2.72 2.72 2.74 16.53 DYNAMO Temp. °C. Volts. Amps. 6XL34/4. 16-49-65 18.0 12.2 P & R TBD7/10. 15-50-65 19.5 12.6 6XL34/1 12.5-50.5-63. 18.2 11.9 Contd. | ||