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).
Analysis of labour hours required for engine decarburation with different modifications.
| Identifier | ExFiles\Box 131\2\ scan0176 | |
| Date | 23th May 1936 | |
| - 3 - Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}6/G.23.5.36. There has been recurrent complaints after the above method has been carried out. If a modification B. is carried out at the same time as a bottom decarburation, the total labour hours are 100. (40 1/2 hours extra). Average Bottom decarburation 59 1/2 hours. If a modification C. is carried out with a bottom decarburation (i.e. remove engine from the frame), the total average labour hours are 161 1/4 There have been no recurrent cases during 12 months with this modification. Top decarburation .. labour hours 24 1/2 15 1/2 skilled 9 1/2 semi. Nipping up of bearings in conjunction 46 3/4 hrs. 22 skilled 24 3/4 semi. Total 71 1/4 Bottom decarburation .. labour hours 59 1/2 36 skilled 23 1/2 semi. Nipping up of bearing .. labour hours 40 1/2 Total 100 52 skilled 48 semi Bottom decarburation and modification C. 106 1/4 skilled 55 semi Total labour hours 161 1/4 Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} | ||