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 a 'General' bye pass oil filter for a B.S.V. Bentley Engine.
| Identifier | ExFiles\Box 97\5\ scan0216 | |
| Date | 9th June 1939 | |
| 4006. To Ry. from Rm{William Robotham - Chief Engineer}/IBW. c. Ds. c. Mx.{John H Maddocks - Chief Proving Officer} c. Rm{William Robotham - Chief Engineer}/O&W. W/K.{Mr Kilner} c. Ds/L.V. c. Ds/Jnr.{Charles L. Jenner} c. Ds/KGS. Rm{William Robotham - Chief Engineer}/IBW.9/AH.9.6.39. B.S.V. BENTLEY - ENGINE B.III NO.7 UNIT. Test of "General" bye pass oil filter. Attached are reports by Wakefields and our Lab- oratory on samples of Castrolite removed from the engine of B.S.V. after 31,800 miles running, during which the oil was not changed. Our Laboratory report also includes the analysis of the sludge which settled out of each of five samples drawn off during the running. The general conditions of the test were as follows:- Mileage. 31,800 miles were covered at medium and high speeds under Continental conditions. Very little traffic or town running. Time. 3 1/2 months. Mid-December to early April. Consumption. 11 gallons added. 2900 m.p.g. Sump capacity. 14 pints. Oil samples taken. A.{Mr Adams} 11,543 miles. B. 17,928 " C. 22,337 " D.{John DeLooze - Company Secretary} 23,765 " E.{Mr Elliott - Chief Engineer} 27,211 " F.{Mr Friese} 31,800 " Filter Cartridge Replacements. Miles run. Total miles. 1st. Cartridge (American) 5,364 5,364 2nd. " (British) 6,179 11,543 3rd. " (American) 10,794 22,337 4th. " (British) 1,428 23,765 5th. " (British) 8,050 31,815 | ||