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).
Volt-speed characteristic (Open Circuit) test results for a 'Smud Type A' Dynamo under cold conditions.
| Identifier | ExFiles\Box 3\5\ 05-page202 | |
| Date | 11th February 1930 | |
| R.R.239 (spl) R.c.7/57 (12 x 12.) IMP 19746 X 295a 172 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Mr. Clark 11/2/30 * Order No: X Customer's No: - Smud Type A.{Mr Adams} Dynamo Volt-speed Characteristic (O.C.) Cold. Table: Speed | Volts 400 | 9.70 450 | 11.3 470 | 12.1 500 | 13.05 530 | 14.1 550 | 14.9 590 | 16.25 [Handwritten note to the right of the table]: About 15°C by thermometer Signed: [Illegible signature] This Sheet must be booked [word 'booked' is struck through] on completion of the work. | ||