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).
Notes and considerations regarding the assembly of a detachable-sided steel bonnet.
| Identifier | ExFiles\Box 112\3\ scan0049 | |
| Date | 30th June 1938 | |
| To D.I. from HPS.{Horace Percy Smith - Experimental Factory Mgr} c. Rm.{William Robotham - Chief Engineer} Handwritten in red (crossed out): STD. We do not appear to have taken up any issues on this Job (P.) 1.B.50 BONNET. 805 H.W.P./sm We give below for your consideration a few points which were noted during assembly of the detachable-sided bonnet produced from 20 SWG. Lysaght's steel. The bonnet top and side plates must be produced very close to the finished dimensions if excessive hand work is to be eliminated, since the material crimps at its edges when cut with shears. The bonnet side plates comprise one hundred pieces; this figure, of course, includes all nuts, bolts and washers. (Handwritten in red circle: All) Nine pieces are involved on the top plates, considering the hinge as one complete unit. The front and rear support brackets comprise 74 items, making a grand total for the complete bonnet assembly of 183 components. The Remax fasteners are badly spaced and give the bonnet an unsymetrical appearance. This could of course be remedied by moving one catch to the rear of the spare wheel carrier. The side plates could be incorporated in the two end stiffeners, which in addition to relieving the strain on the panel would permit the deletion of four pieces. The rear support bracket is produced in two pieces and bolted to the dash, with stiffeners behind; could not this be made similar to the front support bracket, i.e. spot welded to the dash or secured by means of the scuttle bolts. This bracket could also be modified to take the endways location of the side plate and thus render the two locating pieces unnecessary. If this suggestion was adopted, one piece of the bracket, four stiffeners and four bolts, nuts and washers could be dispensed with. The U-shaped cover for the felt could also be replaced by a flat strip. On the Experimental chassis it was not possible to fit the bonnet until the wings were in position, since owing to the absence of stays from the radiator to the dash a certain amount of movement took place whilst the wings were being fitted. continued. | ||