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 testing and modification of a radiator, bonnet, and starting handle.
| Identifier | ExFiles\Box 108\3\ scan0207 | |
| Date | 9th May 1938 | |
| -14- RM{William Robotham - Chief Engineer}/IMW.{Ivan M. Waller - Head of Chateauroux}3/MR.9.5.38. Radiator LOP.LW.1446. Radiator matrix ex 27.G.VI. This matrix was removed early in the running and a modified matrix incorporating a different bottom fixing and a special Bakelite filler cap with rubber washer was fitted. No trouble was experienced and the Bakelite cap was preferred to previous caps for ease of removal and handling when hot. It remained water tight and did not leak or stick shut. The rubber washer was made by The British Tyre & Rubber Co; an alternative by Avon was tried and found unsatisfactory. The water fell to a constant level just below the bottom of the filler spout, so that it was just visible in the top water pipe. It will be advisable to point out to owners that as long as water can be seen none need be added. An overflow pipe incorporating a steam valve was run for the last 5,000 miles. This maintained the water level up to the filler cap and none was added during this mileage although the fan was out of action for the final 2,000 miles. This steam valve will not be fitted on production but is available should it be found necessary in service. The bottom pipe fouled the crankcase. This should be modified for production. Bonnet LOP.LW.1524. Thin gauge top panels. The lighter material for the top was not intended for production. The paint scuffed on either side of the centre hinge and the panels dished round the plated buttons which come together when the bonnet is opened. The general appearance of the surface was poor. Starting Handle LOP.LW.1055. LeC.5563-84 Lightened one piece starting handle. Good in all respects and marked improvement on present standard. The latitude for movement with the raised front engine mounting was sufficient. | ||