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).
Bentley Oil Flow Test, detailing established times for bearing conditions and specific test results.
Identifier | ExFiles\Box 114\3\ scan0085 | |
Date | 1st June 1938 | |
File To By... from Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux} c. to Mx.{John H Maddocks - Chief Proving Officer} ----------------- Rm{William Robotham - Chief Engineer}/GWH.{George W. Hancock - Head Chateauroux}12/N.1.6.38. ----------------- Re: Bentley Oil Flow Test. ----------------- The established times for determining the condition of bearings are as follows:- Good bearings... 7 mins. upwards. Bearings need attention with a flow of 4 mins.30 secs. and under. Artic oil is being used for the tests. Occasionally there may be a case of a higher time limit than 4 mins.30 secs. when the bearings need attention. This relies on the chief tester's report, and would be left to the discretion of the chief engineer. A case of this sort arose over B.130.GA. The tester reported thump, time flow was 4 mins. 46 secs. Tester was definate in his report. Engine dismantled .010" sinkage was found on journal bearings. The following are times and sinkage: Mins. secs. sinkage. 2 43 .012" } 2 43 .010" } 2 30 .010" } total. 2 05 .012" } 1 35 .014" } Unfortunately the sinkage figures have not all been recorded. This is going to be in the future. Will you please let me know whether you require any further information. GWH.{George W. Hancock - Head Chateauroux} | ||