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 test results for the servo motor, gear mechanism, brakes, and various chassis fittings and mountings.
| Identifier | ExFiles\Box 108\1\ scan0152 | |
| Date | 3rd September 1937 | |
| -4- top gear to jump out of engagement on the over-run. Towards the end of the mileage it became difficult to disengage top gear and at times it would not come out at all. Third gear also became difficult to disengage on occasions. Servo Motor Mechanism LOP.GW.1412 Trouble was experienced with the brakes binding owing to the servo sticking. This was due to partial seizure of the centre spindle in the tube which was dry and had picked up. It was also found that the bosses for the screws fixing the flexible plate drive were fouling the inside edge of the serrated portion of one friction disc. The curved arm against which the driving peg works was tight on its bush. When these faults had been overcome the servo gave no further trouble. It was smooth, powerful and effective, and good in all respects. Wear had taken place where the scissor lever comes back against the stop and a click on release was audible from this source. A rubber stop is required. The rubber stop on the servo reverse link was quite satisfactory. Change gear and Brake Mechanism. LOP.GW.1447 The freedom from vibration on the isolated change speed lever was a welcome change after the vibrations felt on the Phantom III lever. It was necessary to clear away the gate slightly at the start after which the lever always moved across freely in either direction. The hand brake was satisfactory. Under certain conditions one to two notches clearance was lost due to heating and cooling effects in the brakes but there would appear to be sufficient sponge to overcome this variation. Frames and Fittings LOP.Fw.926 LoC.3163 Petrol tank suspension and stoneguard. These were satisfactory. LoC.3558,3598,3601, High Front Engine Mounting. The Fw.1175 support arch fractured and the Fw.1176 nose bearing broke off inside the rubbers. The method of taking the torque reactions was unsatisfactory. The whole mounting is being completely re-designed. LoC.3478 Mod. to Body Brackets. The wheelarch support brackets Fw.376/7/8/9 were collapsing at the end of the mileage. The Fw.376/7 contd | ||