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 comparing the output curves of Goshawk and U.S.A. Bosch dynamos at various speeds and temperatures.
| Identifier | ExFiles\Box 51\1\ Scan135 | |
| Date | 11th January 1933 | |
| OUTPUT CURVES OF R.R. GOSHAWK DYNAMOS AND U.S.A. BOSCH DYNAMO [AS FOUND ON NEW DERBY P.II] AMPERE OUTPUT OPERATING VOLTAGES [Hot] DYNAMO SPEED [R.P.M.] Upper Curves: R.R. EXPL. B.I.S.W.G. Fuse wire Ext'l Resis. R.R. EXPL. 62°C R.R. NO. 43. 64°C U.S.A. BOSCH 63°C TO Full retard C.A.V. D.5. 58°C SPECIFIED PERFORMANCE (hot) Lower Curves (Field Currents): R.R. NO. 43. 64°C R.R. EXPL. 62°C R.R. EXPL. B.I.S.W.G. 62°C C.A.V. D5. 58°C U.S.A. BOSCH 60°C S/A / 11.1.33 F.M.C. CHECKED | ||