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).
Points arising from the general assembly of the Spectre Chassis, detailing issues with the carburetter, reflux pipes, and mixture control.
| Identifier | ExFiles\Box 4\1\ 01-page302 | |
| Date | 28th June 1936 | |
| To R.{Sir Henry Royce} from HSD. BY.{R.W. Bailey - Chief Engineer} c. Wer. o.{Mr Oldham} Bft. c. E.{Mr Elliott - Chief Engineer} X300 Spare REPLUTED We give below points which have arisen in connection with the general assembly of the SpectreCodename for Phantom III Chassis. CARBURETTER - I.P. R.{Sir Henry Royce} R6081 (1) When the aluminium Joint Washer is in position, the spigot on the Carburetter Body N. 85500/1 is not sufficiently long to locate in the induction pipe. (2) The spring pins in the Throttle Couplings are not in line with the pins in the Return Spring Brackets on the Water Outlet Manifolds (Loc 3983) (3) When the Petrol Lever is correctly set the tongue N.89774 on the float fouls the float chamber cover the height of which should be increased at least .100 in order to give the necessary clearance. REFLUX PIPES - I.P. R.{Sir Henry Royce} R5899 It is considered that the 1.500 diam. cored valve port in the thermostat housing should be machined to size in the bore in order to ensure concentricity with the valve. MIXTURE CONTROL - I.P. R.{Sir Henry Royce} R5643. (1) The throttle control bracket N. 83800 has not been detailed in accordance with the scheme, Led 4930, the flange being on the wrong side of the bracket. (2) The Mixture Control index plate on the instrument board is approximately 2.000 out of line with the corresponding hole in the dashboard. (3) The Mixture Control is very heavy to operate. This is partly due to the fact that owing to lack of lubrication and the thrust of the driving pinion N.86364 the main jet actuating rods are apt to bind in the Carburetter Body. The jet itself also shows a tendency to bind owing to the length and low rating of the Spring N. 89783 causing it to buckle and exert an uneven pressure on the jet face. | ||