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).
Technical memo (sheet 4) discussing modifications to the Spectre model's power unit, frame, dashboard, and water circulation system.
| Identifier | ExFiles\Box 4\1\ 01-page326 | |
| Date | 15th April 1935 | |
| (sheet 4) Power Unit Durability. We have never advocated or instructed close side clearances for blade rods on the SpectreCodename for Phantom III engine. We prefer to locate the rods from the pistons to maintain concentricity of loading, which has always been our practice on chassis engines, and allow sufficient side clearance to cover manufacturing tolerances affecting the alignability of the opposed cylinder block. Frame Stiffness. We are anxious to obtain comparative figures for frame stiffness for the Cadillac and SpectreCodename for Phantom III. We have the particulars now ready for introducing further holes into the webs of the side channels. We find this modification saves 5 lbs on the webs, and 20 lbs on the bolts and distance pieces. This should enable us to increase the frame gauge from .104 to .128, and have approximately 12 1/2 lbs in hand as weight saved. We want these modifications on No.4. SpectreCodename for Phantom III. Dashboard. The experiment with the dashboard fixed solidly to the body has given the result for which we hoped, and we should like this modification carried out permanently on all SpectreCodename for Phantom IIIs. In the meantime we are going ahead with our proposals for a built-in scuttle dash and footboard construction to be all in one with the body, and we should like to have this on No.4. SpectreCodename for Phantom III if necessary. When using noise insulation on the back of the dash, we do not consider it is necessary to use the double dashboard. A finished scheme will be sent through as soon as possible based on what we are doing for our current chassis, showing how this should be done. With these schemes of insulation we shall be faced sooner or later with fitting heaters for warming the interior of the car. We have approved of one type of car heater, namely the Clayton Dewandre. Engine Water Circulation System. We should like to have some more information about this, consequent upon the alteration to the cross water passage, the larger water pump, and modifications to connecting holes between cylinder and heads. | ||