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 the engine-hot output of a NORB Goshawk dynamo with an annealed copper commutator, showing speed vs amperage.
| Identifier | ExFiles\Box 50\5\ Scan326 | |
| Date | 26th June 1924 | |
| RR 238 (100 BKS) (SH37.28-6-20.) MP 224358 X. 4333 ROLLS-ROYCE LTD. INSTRUCTIONS. To E.Y.b. Date 26 June 1924 Order No. W.A. 51 Customer's No. X.4383 Engine-hot output of NORB Goshawk dynamo with annealed copper commutator. Ambient Temperature 26.5°C. Average Dynamo carcase temp 84°C. Speed Output (amperes) 618 0 660 1.0 728 3.0 810 5.0 930 7.0 1110 9.0 1270 10.0 1328 10.2 1388 10.5 1430 10.7 1570 10.9 1645 10.7 1800 10.5 2020 10.0 2260 9.0 2970 7.0 3620 5.0 Signed H.E.W. This Sheet must be filed on completion of the work. | ||