Voltage readings at various tapping points to diagnose a potential bad connection.
| Identifier | ExFiles\Box 167\1\ img310 | |
| Date | 4th January 1939 | |
| -2- Tapping Point. Battery + C. Motor + terminal. Main fuse + terminal. Main fuse - terminal. Ammeter + terminal. " - terminal. Cable connector Head lamp terminal. Head lamp body (earth) Dash board Chassis frame Negative cable earth connection. Potential. 11.9 volts. 11.8 " 11.6 " 11.6 " 11.4 " 11.35 " 10.6 " 10.3 " 0 " 0 " 0 " 0 " Total drop. 1.6 volts. We cannot account for the difference between this and the previous result, but we think there may have been a bad connection somewhere. In any case, these figures should be given preference. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||
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).