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 ampere output versus speed curves for a Rotax A.T.4 Dynamo for the Goshawk engine.
| Identifier | WestWitteringFiles\G\September1921\ Scan82 | |
| Date | 21th September 1921 guessed | |
| AMPERE OUTPUT R.P.M. AMPERE OUTPUT — SPEED CURVES OF ROTAX A.T.4. DYNAMO FOR GOSHAWK. FULLY HOT CONDITION ON SCHEDULED VOLT-AMPERE CHARACTERISTIC Specified Performance dotted After heating test Before heating test 0 1 2 3 4 5 6 7 8 13.6 13.85 14.1 14.35 14.6 | ||