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).
The design of an eight-point ignition distributor, D.CD.973, for the B.80 engine.
| Identifier | ExFiles\Box 123\5\ scan0132 | |
| Date | 26th October 1938 | |
| 1044 BY/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} DA.{Bernard Day - Chassis Design}10/G.26.10.38. B.80. IGNITION DISTRIBUTOR. D.CD.973 and D.CD.971. Herewith Distributor scheme D.CD.973, together with Cam Form D.CD.971. This is an eight point distributor intended for use on first B.80 engine. To avoid wasting time on die sinking we have included DW.111 Distributor Head, from an old design-LeC.4276, dies for which already exist. At a later date we should like to modify this Head to give increased sparking distances and more suitable clip slots. The new cam D.CD.971 is necessary to provide .020 gap at contact points, as is present practice (cam to LeC. 4276 gave .034). The rest of the unit is similar to D.CD.838 (Distributor for B.60) using Lucas governor, shaft, condenser etc., but slight alterations to contact adjusting plates have been made to give required positions of contact levers. DA.{Bernard Day - Chassis Design} | ||