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).
Cost and modification of Bentley and Wraith II petrol tank stone guards.
| Identifier | ExFiles\Box 149\4\ scan0203 | |
| Date | 26th February 1937 | |
| 1263. Rm{William Robotham - Chief Engineer}/Gry{Shadwell Grylls} from Rm{William Robotham - Chief Engineer}/JBD{John B. Dixon - Fuel Systems} c to EV.{Ivan Evernden - coachwork} c to DA.{Bernard Day - Chassis Design} Rm{William Robotham - Chief Engineer}/JBD{John B. Dixon - Fuel Systems}5/M.26.2.37. The Bentley Petrol Tank Stone Guards. In reply to E/EV{Ivan Evernden - coachwork}3/MN.23.2.37. For the time being, we recommend the Stone Guard to FB2666 which has been standardised should continue. The LeC.5500 scheme saves 6d. in material cost (bought out) but adds 5d. to the labour cost for fixing to the tank. This labour cost bears a Works overhead charge of 150% thereby increasing the all in cost 6d. from 8/9d to 9/3d. The increased labour charge is due to the difficulty the Works anticipate in sweating a long narrow edge to the thin thank body. It appears that the only course open is to compromise between the two schemes and we suggest that the LeC5500 scheme is modified by breaking up the long length of attachment.into short pieces by nicking it and a further labour cost obtained. This also applies to the Wraith II Tank Stone Guard to LeC.5520. Rm{William Robotham - Chief Engineer}/JBD.{John B. Dixon - Fuel Systems} | ||