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).
Design and implementation of a combined dipstick and filler plug for a B.5 gearbox.
| Identifier | ExFiles\Box 99\4\ scan0206 | |
| Date | 9th May 1939 | |
| 428 GRX To: Da.{Bernard Day - Chassis Design} c. to Rm.{William Robotham - Chief Engineer} c. to By/CRL.{C. R. Lisson} BY/NS.{Norman Scott}3/MG.9.5.39 BENTLEY 5 G.CD.1359 - COMBINED DIPSTICK AND FILLER PLUG The design G.CD.1359 was produced for B.5. The pieces produced to this scheme are instructed for use on the 6 Experimental Chassis and also for the first 6 Experimental Production Boxes. It was not intended to alter the breathing arrangement until we had run a Gear Box fitted with the combined filler plug and level. We understand that the previous breather on B.5 gear box did not pass oil so that, as we are in almost the same position, we expect to have the same condition. We would suggest that, even if the hole in the handle proves satisfactory, an improved vent could be obtained at less cost by putting an insert in the mould to produce a slot up one side of the plug. This slot would communicate with the atmosphere through the underside of the flange. The flange could be stiffened up to compensate for the local reduction in thickness. Compared with the previous scheme it would save the cost of drilling two holes in the dipstick, and also the cost of drilling the gear box on every car if G.CD.1359 is proceeded with. From the Works point of view, the deletion of the drilled holes will be an advantage because the drilling machines are already being used to maximum capacity. (continued) | ||