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 for a Smith Dynamo 2D(2) cut-out put under cold conditions.
| Identifier | ExFiles\Box 3\5\ 05-page245 | |
| Date | 18th May 1920 | |
| R.R. 500 (12/18) G.S.P. 54 6.19. P5P 2085.53 X 295 I 90945 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Mr Clark. Order No: - Customer's No.: YB19. Re: X Date: 18/5/20 Smith Dynamo. 2D(2) Cut out put Cold Condition 18°C Speed | Amperes | Volts 438 | 0 | 12.30 475 | 2.30 | 12.45 510 | 3.85 | 12.60 535 | 5.20 | 12.85 580 | 6.85 | 13.10 630 | 8.45 | 13.5 660 | 9.40 | 13.7 710 | 10.60 | 14.0 765 | 11.80 | 14.25 800 | 12.25 | 14.40 (Contd.) Signed This Sheet must be filed on completion of the work. | ||