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).
Dynamo brush setting diagrams for Goshawk (positive rotation) and E.A.C. (negative rotation) models.
| Identifier | ExFiles\Box 51\1\ Scan399 | |
| Date | 10th July 1924 | |
| DYNAMO BRUSH SETTING DIAGRAMS Top Diagram: PRODUCTION 58° GENL TEST 62° GOSHAWK (POSITIVE ROTATION) N 9° RETARD + 16.4° S 16.4° 122° PRODUCTION. 118° GENL TEST. S 12.4° F 10.9° N Middle Section: VIEWS FROM COMMUTATOR END IN THESE DIAGRAMS THE MAIN AXES OF REFERENCE ARE THE NEUTRAL AXES OF COMMUTATION IN THE ABSENCE OF ANY ARMATURE REACTION. THE MAIN BRUSH AXES ARE ARRANGED IN THE DESIGN OF THE MACHINE TO COINCIDE WITH THE POLAR AXES. Bottom Diagram: 65° N 11° RETARD 19.5° S +19.5° 116.5° S 12.4° F 14.3° N E. {Mr Elliott - Chief Engineer} A. {Mr Adams} C. (NEGATIVE ROTATION) Bottom Right Stamp & Handwriting: 10 JUL 24 DERBY E.F.C. 12/5/24 | ||