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 open-circuit volt-speed curves for the Goshawk dynamo under cold and hot conditions.
| Identifier | WestWitteringFiles\J\January1923\ Scan35 | |
| Date | 23th November 1923 | |
| OPEN-CIRCUIT GOSHAWK DYNAMO VOLT-SPEED CURVES. For cold and fully hot conditions. E.M.F. [VOLTS] DYNAMO SPEED [R.P.M.] Table of Balancing Speeds: Dynamo. | 12.4v. Cold | 13.6v. Hot | Range. U.S.A. Bosch. | 467 | 550 | 83 C.A.V., D.B. | 529 | 579 | 50 R.R. No 43 | 570 | 660 | 90 R.R. Expl. | 585 | 674 | 89 Curve Labels (from bottom to top): U.S.A. Bosch (14°C) U.S.A. Bosch (65°C) C.A.V., D.B. (22°C) R.R. No. 43. (14°C) R.R. No 43. Expl. (18°C) C.A.V., D.B. (58°C) R.R. No. 43. (64°C) R.R. No 43. Expl. (62°C) Horizontal Lines: 13.6 volts 12.4 volts Top right corner text: DH{D. Henderson - Showroom}/20-1-73 E.T.C. 23/11/23 | ||