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 changes and construction features for the 'Wraith' model radiator, aiming for cost reduction.
| Identifier | ExFiles\Box 105\1\ scan0276 | |
| Date | 19th January 1937 | |
| - 2 - (4) "Shell to be in mild steel chromium plate" You will note that in our Rm{William Robotham - Chief Engineer}/Std16/JH.19.1.37 we stated that we were by no means sure that this was practicable from the plating point of view. We have since discussed this with the plating shop and agree that the idea offers too many difficulties to be worth proceeding with. (5) "Channel section supporting radiator to be centrally mounted off flat rectangular pad of rubber approx .5" thick" We do not understand your criticism or what you mean by the statement "this would be the only source of squaring up the radiator etc." Obviously the radiator would be located exactly as on the Ph.III, i.e., by stays from the dash and the bonnet rest angles, the only difference from Ph.III being that the rubber supporting block mounting should be reduced in size and complication. Since writing Rm{William Robotham - Chief Engineer}/Std6/JH.19.1.37, we have been looking further into the question of alteration of the "Wraith" radiator with a view to reduction of costs and since you are about to produce a design for this purpose, we give a list, as follows, of the features which we consider should be incorporated. (1) General Construction. (a) A channel section sub yoke to extend only high enough to permit a sound three bolt attachment of the wing stay to the yoke piece - the attachment to be as shown on drawing Rm{William Robotham - Chief Engineer} 327 attached. (b) The yoke to be tied by a channel section which will run across the yoke and support the radiator matrix unit, as an alternative to mounting the latter off its side plates. (See Rm{William Robotham - Chief Engineer}327 attached). (c) The shell to be stiffened by angle pieces sweated or spot welded on the side plates (we are making enquiries as to the practicability of such spot welding) and mounted off the yoke piece by means of these stiffeners. (d) The matrix unit to be supported on the channel piece mentioned in (b) and braced to the shell by means of angle pieces rivetted or spot welded to the matrix side plates and the stiffening angles on the yoke. | ||