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 an experimental motor fitted with N.1760 springs and C.M.2 brushes.
| Identifier | ExFiles\Box 35\1\ scan 039 | |
| Date | 10th November 1919 | |
| 10.11.19. Mr. Clark. --------- TEST OF EXPL. MOTOR FITTED WITH N.1760 SPRINGS AND C.M.2 BRUSHES The motor ran well for whole period (20 mins) the torque being 460 lbs-inches, the amps 145. The motor got very hot but there was no sign of brush failure. (Sgd) L.F. | ||