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).
Results of rigidity tests on different frame cross designs for the Spectre and Bentley chassis.
| Identifier | ExFiles\Box 94\4\ scan0043 | |
| Date | 29th May 1935 | |
| GRY{Shadwell Grylls} X327 To Sg.{Arthur F. Sidgreaves - MD} and Wor.{Arthur Wormald - General Works Manager} from E.{Mr Elliott - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} Hs.{Lord Ernest Hives - Chair} By.{R.W. Bailey - Chief Engineer} RMC. Da.{Bernard Day - Chassis Design} JLE.{J. Lee Evans - Chassis Test Manager} EV.{Ivan Evernden - coachwork} Frame Cross Rigidity. At my request EV.{Ivan Evernden - coachwork} produced some reduced scale drawings of different types of frame crosses, and tested them out in model form, with the results given in the attached report - E/EV.{Ivan Evernden - coachwork}3/MN.29.5.35. These results show the superiority of the design of cross we constructed for the SpectreCodename for Phantom III chassis. None of the crosses tested in comparison with the SpectreCodename for Phantom III type entirely represent the Cadillac. The type of cross similar to the Cadillac is figure 3 type, but with the top plate bent up to clear the transmission, which should somewhat reduce rigidity. Another conclusion to be drawn from these results is that the figure 4 type of cross would be suitable for the Bentley frame, if we can accept that the final frame assembly is in one piece, and cannot be readily pulled apart for the replacement of any of its members. E.{Mr Elliott - Chief Engineer} | ||