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 report on the Goshawk Dynamo's performance when run on an open circuit.
| Identifier | ExFiles\Box 51\1\ Scan245 | |
| Date | 27th September 1923 | |
| RR 238 (300 Bks.) (SF 152. 6-11-18.) MP 197880 X 4383 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: EFC {E. Fowler Clarke - Electrical Engineer} Order No: AB.86. Customer's No.: 1 27 Sept 1923 Goshawk Dynamo Performance on Open Circuit! A test has been made to find the effects of running a Goshawk dynamo disconnected from its load. Dynamo E (set to 11.0 amp production Specification) was used, being first heated up to 80°c, by running loaded, whilst packed with heat lagging. The open-circuit volt-speed curve was then taken, up to 2000 rpm, the highest speed obtainable. On reaching this speed, the temperature (by thermo-meter) had risen to 89°c, and it attained 96°c after stopping. The machine was therefore allowed to cool to rather above 70°c and the test was repeated, starting with the high speeds. This finished with the machine at 80°c, which (contd) This Sheet must be filed on completion of the work. | ||