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 and E.A.C. engines, detailing positive and negative rotation settings.
| Identifier | WestWitteringFiles\L\2Jan1924-March1924\ Scan76 | |
| Date | 11th December 1923 | |
| DYNAMO BRUSH SETTING DIAGRAMS GOSHAWK (POSITIVE ROTATION) PRODUCTION 58° GENL TEST 62° N 9° RETARD +16.4° 12.4° 122° PRODUCTION. 118° GENL TEST. S S 16.4° F 10.9° N 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. E.A.C. (NEGATIVE ROTATION) N 11° RETARD 65° -19.5° 12.4° S +19.5° 115° F 14.3° N ROLLS-ROYCE LIMITED PRINT ROOM 13 MAR 192? DERBY E.F.C. 11/12/23. | ||