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).
Labour cost and time breakdown for a bottom decarbonisation job.
| Identifier | ExFiles\Box 107\2\ scan0054 | |
| Date | 13th June 1941 guessed | |
| Bottom decarb. B182 EF Fitters skilled. Rate semi. Rate £ s d Removing cylinder block etc 1" 7 10 7d 1 . 1 . 8 Drop sump & examine bearing 10 hrs 1" 7 decarb top 18" 1" 3 18 8 1/2 1 . 15 . 3 adjust tappets & 1" 1" 0 1 8 1 . 8 after test Test 4" 1" 8 3/4 - 1"4 11 . 0 decarb carburettor etc 3" 1" 3 3 . 9 clean down engine rough 2" 1" 2 2 . 4 £3 . 15 . 8 Oil con mileage 3 hrs @ 1/4 Total hrs 36 34 1/4 Total Labour hrs 70 1/4 70 1/4 49 1/4 119 1/2 | ||