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).
Request to test the volumetric efficiency of a gear type pump for gearbox control.
| Identifier | ExFiles\Box 104\4\ scan0187 | |
| Date | 27th March 1933 | |
| A5310. HS.{Lord Ernest Hives - Chair} FROM HDY.{William Hardy} HDY{William Hardy}3/M27.3.33. C. to SG.{Arthur F. Sidgreaves - MD} WOR.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} GEARBOX CONTROL. R.{Sir Henry Royce} has suggested that high pressure oil should be used for the control of the proposed epicyclic gear in order that the time of operation may be kept down, and we now wish to know whether a gear type pump will do. Would you kindly make a test to determine the volumetric efficiency of say an engine gear pump at 100, 200, and 300 lbs. per sq. in. with engine oil at whatever temperature is thought to be the maximum that gearbox oil will attain. The pump should have the maximum clearances given by the manufacturing limits, and should also have extra clearance to represent wear if it is thought that appreciable wear takes place in these pumps. A 20/25HP. size of pump should be sufficiently large. HDY{William Hardy} | ||