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).
Electrical wiring insulation, flexible armouring, and the use of tubing for conductors on a car chassis.
Identifier | Morton\M11\ img238 | |
Date | 1st October 1919 | |
To EFC. from E.{Mr Elliott - Chief Engineer} -2- E3/G1/10/19 Contd. The diameter over the insulation of the 70/36's should, if possible, be made a little smaller than the samples you supplied, by reducing the thickness of the rubber insulation, to enable these conductors to be used without alteration to our design LeC.1107. If there is any difficulty about this matter however, they should be used in their present diameter, and the design slightly enlarged to suit. With reference to the flexible armouring, Mr. Royce considers that this does not fully perform the function of a carrier, and is a source of danger electrically. He would prefer the wires to be carried in the manner already suggested, by means of tubing, throughout the chassis, and considers that this could best be carried out by taking one of our 40/50 H.P. chassis and getting some actual tubes and clips, and arranging the wiring in the best manner. If we cannot have this tube carrier system, then we must have the armouring, but the tubes are much to be preferred, and Mr. Royce would like an attempt made at the earliest possible moment to get them rigged up. X3621. [Strikethrough]It will be recollected that it was proposed to use aluminium tubes baked enamelled inside and out.[/Strikethrough] Referring to the asbestos covered conductor, Mr. Royce cannot see any reason for this conductor being so near the hot exhaust as to demand the asbestos covering, which covering after all is somewhat of a delusion, as it does not prevent the rubber insulation from being spoiled by heat. In arranging the tube carriers on the chassis therefore, the proximity of this conductor to the exhaust should be avoided. E.{Mr Elliott - Chief Engineer} | ||