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).
Issues and recommendations concerning a propeller shaft and exhaust fittings after extensive mileage testing.
| Identifier | ExFiles\Box 108\3\ scan0238 | |
| Date | 9th May 1938 | |
| -13- firstly due to insufficient clearance in the levers & the pawl linkage and later due to the lower front lever being bent by stones. A guard has been instructed. Propeller Shaft. L.O.P.GW.160s. OW.1673 Hardy Spicer Prop. Shaft. The shaft ran over 10,000 miles without adding lubricant before signs were experienced of the sliding joint stiffening up. It is recommended that this be greased every 5,000 miles in service. A slight period at 48 M.P.H. was noticeable at intervals during the mileage. A modification to the propeller shaft is being developed to overcome this. Exhaust Fittings L.O.P.SW.1278. Exhaust Suspension to CO.208. The system was satisfactory as a silencer except for blow & from the sliding joints. The rubberised suspension was very good and gave no trouble at all. This was a marked improvement over the rattles, squeaks and wear experienced with previous exhaust suspensions. The sliding joints allowed the intermediate pipe to rotate and foul the cruciform. These joints also proved very difficult to dismantle and as previously noticed were never gas-tight. The swan neck fouled the frame and roll rod in spite of 1" static clearance. Flanged joints are to be used for the first production cars. The downtake pipe to the front expansion box broke after 10,750 miles running and that of the replacement pipe fitted, after 7,800 miles. Two outlet pipes from these front expansion boxes also failed, each after 7,850 miles running. The material was nickel plated mild steel. | ||