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).
Specified performance data for a Goshawk dynamo under fully hot conditions.
| Identifier | ExFiles\Box 39\2\ Scan066 | |
| Date | 22th April 1921 | |
| X.3533 22.4.21. X. 294. X.3533. DYNAMO FOR R.R. GOSHAWK. X.4259. SPECIFIED PERFORMANCE IN FULLY HOT CONDITION. Speed. Amperes. Volts. 630 0 13.4 700 1.75 13.8 750 2.75 13.95 800 3.5 14.05 900 5.0 14.25 1000 6.25 14.4 1100 7.0 14.5 1400 8.0 14.6 1850 7.0 14.5 2250 6.0 14.35 2900 5.0 14.25 3500 4.5 14.15 | ||