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 and adjustments for a dynamo and battery system, noting voltage at various RPMs.
| Identifier | ExFiles\Box 59\1\ Scan236 | |
| Date | 29th June 1920 | |
| RR 238 (150 BKS.) (SH57.29-6-20.) MP 224358 ROLLS-ROYCE LTD. INSTRUCTIONS. To Order No. Customer's No. 3 19 Volts to open 14.7 Open Circuit about 650 rpm 15.2 On battery " 1000 " 16.1 " " " 2500 " Volts to close 11.9 Dynamo standing. 11.4 " at 1600 rpm 10.7 " " 2500 " 10.5 " " 3500 " Next it was found that by tightening the spring by giving the adjusting screw one third of a turn the operation became:- Volts to open 16.9 Open circuit 17.3 On battery dynamo at 1400 rpm 17.5 " " " " 2500 " 18.2 " " " " 3300 " Volts to close 13.4 Dynamo standing 13.0 " at 1400 rpm 12.5 " " 2500 " 11.7 " " 3300 " Signed This Sheet must be filed on completion of the work. (Cont'd) | ||