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).
Graph of output-speed curves comparing a Smith (Type A) dynamo against other models.
| Identifier | ExFiles\Box 3\5\ 05-page171 | |
| Date | 14th August 1920 | |
| E.{Mr Elliott - Chief Engineer} General Motors Current Smith Output Smith Central Current N.E. Current for correctly connected Smith Current OUTPUT-SPEED CURVES SMITH (Type A) DYNAMO as corrected with Exide 'S.H.J' Type Battery of 12 volts 117 cells L.S. & S. DYNAMO SPEED (R.P.M) 1000 2000 2500 3000 3500 4000 E.F.C 14/8/20 | ||