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).
Ring flutter, bearing tests, and gear tooth measurement.
| Identifier | ExFiles\Box 132\4\ scan0081 | |
| Date | 17th August 1937 | |
| -3- Rm{William Robotham - Chief Engineer}/Mths.{Reg Matthews}5/AP.17.8.37 (9) Ring Flutter. They were carrying out tests on ring flutter and were inclined to believe that the vibration was of radial character and not an up and down vibration in the groove. They agree that if running at the flutter speed oil consumption is affected but do not believe that it causes serious trouble in bore wear. They do not agree that it is necessary to go to the American proportion for rings since their own experience showed that American cars suffered from excessive ring wear, and their own tests show that ring gap has a marked effect on oil consumption. Whilst there we had a look round the various Departments, they appear to be doing quite a lot of work on bearings, their method of taking bearing and oil temperatures was quite interesting. They use thermo-couples to take temperature of crankpin and oil in crankpin, the couples are run through the shaft and connected to slip rings attached to the front end. They are doing some work for Humbers using lead bronze main bearings and whitemetal connecting rod bearings. They have two rigs running for big end bearing tests, these consist of single crankpin and rod with heavy piston attached and motored over, all loads being inertia loads. We also saw an instrument they use for measuring inaccuracies of gear teeth, it apparently measures the difference between actual tooth form and a correct involute. This instrument was made specially for them and might be interesting to Rm{William Robotham - Chief Engineer}/FJH.{Fred J. Hardy - Chief Dev. Engineer} Rm{William Robotham - Chief Engineer}/Mths.{Reg Matthews} | ||