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).
Reinforcement of the 'Myth' project's front crossmember using welding instead of riveting.
| Identifier | ExFiles\Box 109\3\ scan0227 | |
| Date | 8th January 1942 | |
| To Rm.{William Robotham - Chief Engineer} c. to Rm{William Robotham - Chief Engineer}/HH. c. to Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} c. to Ev.{Ivan Evernden - coachwork} c. to Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} c. to Rm{William Robotham - Chief Engineer}/GB. 700 Myth. Front Crossmember. We attach to Rm{William Robotham - Chief Engineer}/HH's copy the original of :- PL.1127 Reinforcement of Front Crossmember. Rm{William Robotham - Chief Engineer}/GB. has carried out some frame stiffness tests on the Myth frame received from Messrs. Park Wards, and feels that more stiffness is required at the front. As shown on PL.1127 we have boxed in the front crossmember to obtain this feature without scrapping the first crossmember in position. The ends of the cross-members where they are attached to the side channels have been shown riveted, as spot-welding through three thicknesses of metal is not reliable. We may however prefer to arch or gas weld the reinforcing member to the side channels and crossmember. The reinforcing member is also shown spot welded to the first crossmember by a series of welds along the entire length relying on the lower flange of the inner member being pressed on to the bottom flange of the crossmember by the pressure on the electrods. If spotwelding is not possible for this job we propose the reinforcing member should be arch welded to the crossmember at the front edge. the flanges of the reinforcing member projecting about .500 into the crossmember. This only leaves a small amount of riveting of the stiffening brackets to the radiator support bracket, and suggest even they could be welded for the first frame. Will Rm{William Robotham - Chief Engineer}/HH please get this job detailed as soon as possible. Ev{Ivan Evernden - coachwork}/JD.{J. Draper - Frames} Original to Rm{William Robotham - Chief Engineer}/HH. Prints to: Ev{Ivan Evernden - coachwork}, Rm{William Robotham - Chief Engineer}/HH, Rm{William Robotham - Chief Engineer}/FJH{Fred J. Hardy - Chief Dev. Engineer}, Rm{William Robotham - Chief Engineer}/Wym{G. Harold Whyman - Experimental Manager}, & Ashby. | ||