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).
Commutator distributor primary current curves at different RPMs and brush settings.
| Identifier | ExFiles\Box 164\5\ img425 | |
| Date | 5th April 1939 | |
| COMMUTATOR DISTRIBUTOR PRIMARY CURRENT CURVES VCH 8 850 R.P.M. NEGATIVE BRUSH RETARDED AMPS 2 1 0 850 R.P.M. NEGATIVE BRUSH ADVANCED 2250 R.P.M. NEG. BRUSH RET'D AMPS 2 1 0 2250 R.P.M. NEG. BRUSH ADV'D S.G.L. 5.4.39 | ||