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).
Secret internal memo with hand-drawn diagrams and annotations discussing design improvements for a sequence starter's actuator coil.
| Identifier | ExFiles\Box 64\3\ scan0144 | |
| Date | 28th March 1924 | |
| X9650 SECRET R5/M28.3.24. To E.{Mr Elliott - Chief Engineer} RG.{Mr Rowledge} Da.{Bernard Day - Chassis Design} from R.{Sir Henry Royce} c. to CJ. c. to Hs.{Lord Ernest Hives - Chair} c. to Bv. E.A.C.2.& 5. LEC.1852 - SEQUENCE STARTER. X.9650. ACTUATOR COIL. My object in suggesting that this should be better fixed was that I feared the engine vibrations would cause the coil to move and either destroy its insulation or its connection and so fail in time. Unless we can rely on the bore of the coil being a close fix on the plug I think we ought to have 3 lugs. [Handwritten annotations on diagrams] If good fit here 2 lugs sufficient. Ought not the core to be a short, close, but free sliding fit at this end ? Would an ordinary 60° or slower centre cone make a truer job ? Flange should fit, lugs & screws clear. Could screws be a size larger and tapped through into round window or into brass inserts. Small size aluminium thread blind seems very likely to strip. Some small steel screws as you shew, but with round brass nuts would please me. Close fit caulked. Other fits clear. Two screws like this is better than three in aluminium. Chance two good screws. R.{Sir Henry Royce} | ||