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).
Test report on the ability of scavenger pumps to handle additional oil in the crankcase.
| Identifier | ExFiles\Box 43\3\ Scan095 | |
| Date | 18th December 1926 | |
| To R.{Sir Henry Royce} from Hs{Lord Ernest Hives - Chair}/VH. c. to BJ. Wor.{Arthur Wormald - General Works Manager} c. to RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} c. to BY.{R.W. Bailey - Chief Engineer} 44003 Hs{Lord Ernest Hives - Chair}/VHl/LG18.12.26. F.10. SCAVENGER PUMPS. X3999 Tests have been carried out on 10-F-8 and 10-F-12 to determine the ability of the scavenger pumps to deal with additional oil in the crankcase. Engine speed during the tests - 2250 r.p.m. Oil was added to the crankcase via the inspection plugs in the nose piece at different rates of flow up to 4.8 galls/min. The max. scavenger delivery was found to be the same for each engine - 5.45 galls/min. The normal delivery of the scavenger pump at this speed (2250 r.p.m.) in each case was - 5.0 galls/min. (No extra oil being added). It will be seen that the max. delivery of the scavenger is 9% in excess of its normal delivery, which is controlled by the amount the pressure pump will supply. From the pump dimensions, the expected percentage possible delivery of the scavenger in excess of the pressure pump is - 10%. The scavenger delivery is not affected when the scavenged oil is made to pass through the oil cooler in use on the test bed. (Oil cooler is 18 coils = 90 ft. of 1" internal dia. pipe) The pressure resistance was 25 lbs. Hs{Lord Ernest Hives - Chair}/V.Halliwell. | ||