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).
Design and manufacturing notes on double battery ignition, radiator, and shutter systems.
| Identifier | ExFiles\Box 19\3\ Scan123 | |
| Date | 23th December 1929 guessed | |
| - 13 - Or course with the use of a suction type filter the filters, with bell housings and frames would be omitted but the reserve supply and two inverted standpipes would still be required. 11. Double Battery Ignition. SS{S. Smith}/A-12324 and complete set of details, also A- 10863 Coil. It was found necessary to set the distributors out from the center-line of the vertical shaft to clear the spark plugs on the turbulent head. The distributor Assy. A-14847 shows the advance curve and the tolerances to which it is held. Distributors are set to break at 10° before top dead center and manual advance is 20° in the flywheel. 12. Radiator and Shutter. SS{S. Smith}/A-14232 and complete set of details. The loose shell is made so as to be easily removable. Inner and outer shells are made to jigs so that they are interchangeable. By loosing up the four screws holding the side plates at the bottom tank the whole outer shell can be removed without disturbing bonnet, shutter or anything. A few minor concessions have been made to facilitate chrome plating. Any unevenness or blemish in the surface before plating is very much magnified after chrome plating and for this it is desirable to remove all corners that are at all difficult to polish. This has been done by making the filler cap with a circular base, spun in place, by making the name plate so that it can be attached after plating shell. In this connection we would mention that the method adopted for holding the nameplate in place, is not entirely satisfactory as it results in cracking the enamel in a number of cases. This may be due to rough handling but we think it is more likely soft material in a thin plate. We recommend thickening up this plate for almost any kind of attachment after plating. The shutter and thermostat are supplied by the same concern but we produce the connecting linkage. The thermostat is so arranged that it begins to open the shutter at a temperature 140-145°C and this maintains a water temperature of 165-175°. Matrix is made up of .312 dia. tubes which gives a somewhat wider water space than the old .268 tubes. - continued - | ||