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).
Inspection report detailing engine bearing measurements and wear analysis.
| Identifier | ExFiles\Box 130\2\ scan0157 | |
| Date | 25th September 1936 guessed | |
| (2) 1 2 3 4 5 6 Front 2.248" 2.24725" 2.24525 2.2465 2.247 2.24675. Centre 2.2485 2.2475 2.248 2.248 2.2475 2.248 Rear. 2.248 2.2465 2.245 2.246 2.2465 2.247 Front. 2.247 Centre 2.24775 Rear. 2.2475. Measurements taken at position of oil hole. Front means nearest front of car. The following are taken at right angles to the above. Front. 2.246 2.2465 2.246 2.2465 2.2465 2.2465 2.2465 Centre 2.2485 2.2475 2.248 2.248 2.24775 2.248 2.24775 Rear. 2.24675 2.245 2.246 2.24575 2.24625 2.2465 2.24675 The lines give an indication of wear. 3 2 1 0 thous' (2) Bearings. It is practically impossible tto give the wear of the bearings from all the measurements we have been able to take we have come to the conclusion that no actual wear of the bearing surface has taken place. This statement you may not believe but I should advise very carefull investigation. In our opinion the slackness in the bearings reported and observed is due to wear of the aluminium housing in the top half of crankcase and off the outer dia. of the Hall's metal. The total amount of slackness in the housings caused by this is .008" as near as it is possible to measure. | ||