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).
Instruction sheet detailing the results of fixed conductance dynamo tests.
| Identifier | ExFiles\Box 51\1\ Scan415 | |
| Date | 9th April 1925 | |
| RR 235 (150 BKS.) [SH57. 29-8-20.] MP 22438H X. 4383 ROLLS-ROYCE LTD. INSTRUCTIONS. To: EFC {E. Fowler Clarke - Electrical Engineer} Date: 9. April 1925 Order No. AE.46. Customer's No. X.294 Fixed Conductance Dynamo Tests. "Tests have now been carried out in accordance with EFC {E. Fowler Clarke - Electrical Engineer} 5/T/4-25. Test 1a. Speed to maintain 16.0 volts on the dynamo terminals for various external conductance. | Conductance | Dynamo rpm | Car mph | | :---------- | :--------- | :------ | | 0 | 683 | 9.35 | | ·25 | 775 | 10.6 | | ·50 | 895 | 12.25 | | ·75 | 1145 | 15.7 | Test 1b. Open-circuit volts and speed for 6.0 amperes field current. Speed 965 rpm (=13.2 car mph) Dynamo volts 26.0. (Contd) Signed This Sheet must be filed on completion of the work. | ||