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).
Progress report from the Chassis Division detailing mileage and failures on senior rationalised chassis and engine parts.
| Identifier | ExFiles\Box 144\2\ scan0149 | |
| Date | 24th November 1942 | |
| Copied by Rm{William Robotham - Chief Engineer}/VS.{J. Vickers} 2.12.42. File Nos. 1125, 1212, 666, 8800. (Note: Numbers 1125, 666, and 8800 are struck through) To. Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager} Rm{William Robotham - Chief Engineer}/Wym.{G. Harold Whyman - Experimental Manager}1/OH.24.11.42. CHASSIS DIVISION - PROGRESS REPORT. We give you herewith list of the mileage covered on Senior rationalised chassis and the engine parts to date. Parts Run. Total Mileages. 24.1.41. 8.6.41. 4.10.41. 14.11.42. 6 cylinder high power 50,000 73,727 100,206 143,003 8 " " " 115,000 131,043 145,011 168,399 Hydraulic Brakes. 150,000 182,000 199,396 303,323 Semi-floating axle. 290,000 322,000 401,362 456,705 Bentley V Suspension. --- --- 542,515 700,500 4 cylinder engine. --- --- 4,433 13,867 From the above it will be seen that the total mileage run to date on Cast Iron Engine Units is 325,269. These Cast Iron Engines have proved to be the most reliable engines that we have produced. 30.G.VII. has only been decarbonised twice, once at 50,000 miles and the second time at 98,000. 3.B.50. has run 65,578 miles and is at the moment having its Exhaust Valves ground in for the first time. No 6 ex valve was seating badly and causing low speed misfires. The only failures we have had on B.60. and B.80. engines apart from early Water Pump troubles, have been Dynamo failures at 11,000, 12,500 and 17,000 miles, Dynamo Mounting Bracket broken at 19,000 miles, Ignition Distributor Drive failed at 24,900, all on 3.B.50. car and High Tension Wire failure at 71,000 miles on 30.G.VII. The Dynamo failures were due to a cheap type of Mica which was being tried experimentally. The Dynamo Mounting Bracket has been modified and has now completed 46,000 miles without any further trouble. The Ignition Distributor Drive failure was due to a broken rivet on the plate carrying the Governor Weights, the rivet having fallen to the bottom of the body and thus locking the main shaft of the Distributor. This caused the laminated driving springs to break. New driving springs and distributor fitted, no further trouble. One new High Tension Wire was fitted at 71,000 a complete new set at 91,500, we consider this quite a good life for High Tension Wire. --continued-- | ||