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).
Investigating the fitting of an incorrect idler gear and bracket to engine K8417.
| Identifier | ExFiles\Box 148\1\ scan0288 | |
| Date | 18th November 1940 | |
| To: Rm{William Robotham - Chief Engineer} from RH.{R. Hollingworth} K8417. (Conversion from VI to XXX). This Engine was returned from the Works with suspected idler gear for oil pump drive missing. On examination it was found that "an Idler Gear" was fitted, but was not the right type. The piece numbers were E.40215, Gear, and E.40212, Bracket, whereas the correct parts should have been E.40143 Gear, and E.40142 Bracket. After exhaustive enquiries it was found that alternative gears were provided as a S pecial Ratio for the under-carriage drive, and we cannot account for these gears having been sent to Belper for assembly. Unless the two Gears and Brackets assembled were placed alongside each other and the difference looked for, it would not be noticed on the assembly line. There is a difference of .325 dia: on the gear and the bearing is offset in the bracket. Herewith Photograph showing similarity of assembled parts. Rm{William Robotham - Chief Engineer}/RH.{R. Hollingworth} R.Hollingsworth 1 Photograph. | ||