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).
The development of the Bentley III frame, comparing its weight and cost to the Wraith frame.
| Identifier | ExFiles\Box 86\4\ scan0224 | |
| Date | 25th October 1937 | |
| By.{R.W. Bailey - Chief Engineer} from Rm.{William Robotham - Chief Engineer} c. Sg.{Arthur F. Sidgreaves - MD} c. Es. c. RHC.{R. H. Coverley - Production Engineer} c. Da.{Bernard Day - Chassis Design} c. Mx.{John H Maddocks - Chief Proving Officer} 227 Rm{William Robotham - Chief Engineer}9/R.25.10.37. BENTLEY FRAME. The attached report shows the work that has been done in developing the Bentley III frame. The Wraith frame weighs 347 lbs, the original Bentley III 330 lbs and we anticipate that the final Bentley III frame will be between 225 and 250 lbs. The final Bentley frame, though about 100 lbs lighter than the Wraith, should not be less rigid. The cost, from estimates we have so far received will certainly be less than half that of the Wraith, we hope ultimately one third. One set of frame dies should be capable of producing the Bentley III frame, long and short wheelbase, Bentley 50 frames and a replacement chassis for the Wraith if it is decided that this is necessary. Rm.{William Robotham - Chief Engineer} | ||