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).
Present and future modifications to the Goshawk engine's ignition coil.
| Identifier | WestWitteringFiles\J\November1922\ Scan42 | |
| Date | 23th November 1922 | |
| TO HY.{Tom Haldenby - Plant Engineer} - FROM R.{Sir Henry Royce} C. to CJ. C. to RV. C. to WORT. C. to PN.{Mr Northey} C. to HJS. C. to EPC. ✓ C. to RF. X4049 GOSHAWK IGNITION Apparently it will cause considerable expense to alter the position of the coil, but it should be done as soon as convenient, for the:- PRESENT. (1) Use stabilite cases as arranged, unless Mouldensite one with improved clearances can be proved to be quite as good. (2) Heat and electrically insulate the coil from the engine by fitting air space or non-conducting base, (Mouldensite liner and space or Vulcasbestos), insulate bolts - try ebonite bushes and bakelite or mica washers, so that they do not assist dielectric losses or heat carrying. The coil should then be only the temperature of the air under the bonnet, and less than the water or metal of the upper part of the engine. NEAR FUTURE. (1) No doubt it will be best to move coil into a cooler place. The scheme will be ready this weekend for present and future coils, and for distributor covers with modified terminal, i.e. at the side. Keep the following parts low in production:- (1) Coil Cases. (3) Distributor Covers. (5) Ignition wire tubes and brackets. (2) Engine timing gear cases. (4) Valve rocker covers. (6) Fixing for ballast resistance. R.{Sir Henry Royce} | ||