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 showing hot condition output curves for various dynamos against speed.
| Identifier | WestWitteringFiles\F\May1921\ Scan64 | |
| Date | 17th May 1921 | |
| Y-Axis: AMPERE OUTPUT Numbers on Y-Axis: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 X-Axis: DYNAMO SPEED (R.P.M.) Numbers on X-Axis: 0, 500, 1000, 1500, 2000, 2500, 3000, 3500 Title: X 295. SMITH 2D(7)(RR2) AND 2D(8)(RR3) DYNAMOS HOT CONDITION OUTPUT CURVES WITH CURVE OF SPECIFIED PERFORMANCE OF DYNAMO FOR RR CAR. Curve labels: SMITH 2D(7)(RR2)(No.2083) SMITH 2D(HOT)(AVERAGE OF THREE PREVIOUS MACHINES) SMITH 2D(8)(RR3)(No. 2111) SPECIFIED PERFORMANCE (HOT) Handwritten text: Cef 14-5-21 E.F.C 17/5/21 | ||