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).
Performance graph of the N.C.288 Dynamo for the 20 HP model, showing ampere output and voltage against RPM and chassis speed.
| Identifier | ExFiles\Box 165\6\ img035 | |
| Date | 18th October 1926 guessed | |
| 20 h.p. AMPERE OUTPUT APPROX OPERATING VOLTAGE DYNAMO RPM CHASSIS M.P.H. 11/50 AXLE 31"x4" DIA TYRES. Handwritten Text: 20 HP DYNAMO N.C.288 OUTPUT STANDARD WITH N.C.88 AND P.M.S 1's CONTACTS BOX'D [E23] Curve labels: STD 7° & 29° ETS. 6° & 20° | ||