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 oil delivery to bearings for a Bentley Crankcase Oil Tube and bearings arrangement.
| Identifier | ExFiles\Box 132\3\ scan0032 | |
| Date | 15th July 1935 | |
| To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} +216 15.7.35. Bentley Crankcase Oil Tube. EB.305 - Crankcase & Bearings arrangement. Using the gallery pipe complete with intermediate, and bearing cap pipes, including banjos and union screws, Motorine 'C' oil was supplied by an oil pump to the centre boss of the gallery pipe, as on an engine, the restriction pressure in the pipe being regulated by the pump speed. The delivery at each union screw was then measured at pressures of 10, 20 & 30 lbs/sq.in. at 30°C. temperature. | Press. lb/sq." | Time/100 c.c's at each Bearing. | Total delivery pts/hr. | |--------------|---------------------------|--------------------------|-----------------|-----------------| | | No.1 | No.2 | No.3 | No.4 | No.5 | No.6 | No.7 | | | 10 lb/sq." | 12.8 | 12.4 | 12.6 | 12.6 | 12.6 | 12.6 | 13.0 | 351 | | 20 " | 6.6 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 691 | | 30 " | 3.4 | 3.4 | 3.2 | 3.4 | 3.4 | 3.4 | 3.2 | 1329 | The distribution of oil to each bearing was therefore fairly even. The delivery required to create a given back pressure under these test conditions was naturally higher than that required on an engine, due to the bearing restriction in the latter instance. The nearest comparative figures available to date being :- Engine 605 pts/hr. 90°C. 30 lb/sq.in. Rig 1329 " 30°C. 30 " Further rig tests are pending to ascertain bearing flows and pressures. HS{Lord Ernest Hives - Chair}/W.Bell. | ||