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).
Blueprint graph of a governor advance curve for a DCD 838 distributor with spring specifications.
| Identifier | ExFiles\Box 168\3\ img160 | |
| Date | 24th March 1939 | |
| G.A. 23 DISTRIBUTOR DCD 838 GOVERNOR DW. 814 GOVERNOR ADVANCE CURVE OF R.R. DISTRIBUTOR (R.R.L.2) TO DCD 838 WITH SPRINGS SUPPLIED BY LUCAS 1ST SPRING: OVERALL LENGTH .840" 9 COILS. .175 OUTSIDE DIA .037" WIRE 2ND SPRING: OVERALL LENGTH .885" 8 1/4 COILS. .185 OUTSIDE DIA .028" WIRE WRAITH III LIMITS CAM BREAK PERIOD O.{Mr Oldham} 1'E, 1/2'L, 1'E, O.{Mr Oldham} 3/4'L DECREASING SPEED INCREASING SPEED LIMIT DISTRIBUTOR SPEED R.P.M. 200, 400, 600, 800, 1000, 1200, 1400 ROAD SPEED M.P.H. 8.3, 16.6, 24.9, 33.2, 41.5, 49.8, 58.1 G.J | ||