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).
Preliminary test results for a new oil relay, including issues with piston ring friction and initial advance settings.
| Identifier | WestWitteringFiles\P\2July1926-September1926\ Scan032 | |
| Date | 19th July 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} c.c. to EJ. Wor.{Arthur Wormald - General Works Manager} c.c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c.c. to DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} ORIGINAL Hs{Lord Ernest Hives - Chair}/Rml/LG19.7.26. OIL RELAY. X8685 We have carried out some preliminary tests on the new type of oil relay with the altered piston rings, piston, chamber and governor springs. While these modifications appear to be a distinct improvement, we still have some work to do to determine the best method of fitting the new type of piston rings. As fitted to 12-KX, these rings are rather too good a fit and set up some unnecessary friction. We have therefore temporarily fitted an auxiliary return spring over the main relay piston to deal with this friction. As soon as we have got the rings right, we will send another piston out to France. With reference to the setting of the initial advance shewn on LeC.2242. While this is an accurate means of getting the correct lap easily, it unfortunately gives us slightly more than twice the initial advance specified on your curves. There are a number of minor modifications that we can try to maintain the lap setting and yet get the correct initial advance and we are testing a few of them out. Hs{Lord Ernest Hives - Chair}/W.A.Robotham. | ||