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).
The condition and issues found with the dynamo, oil pump, battery ignition, bonnet, and engine guards.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan062 | |
| Date | 15th January 1926 | |
| - 4 - Dynamo. X4610 X5660 We have had no trouble with the dynamo. It was necessary during continuation of run to clean the commutator, as it had become dirty and brushes had started to sing. Examination at end of run, condition of commutator and brushes was good, there was a slight amount of carbon dust on the brush gear. Oil pump. The oil pump with gears drilled to supply lubrication to it's bearings, has worked satisfactory since attending to the release valve, and plugging the holes up. We have released one hole at a time in each gear, untill failure of pressure after braking was definite . We found that the limit is reached when 4 holes are opened in each gear, and that with 3 it is not certain with 2 holes in each gear it is quite satisfactory; the pressure building up immediately after braking. We are continuing to run the pump in this condition. Battery ignition. X4357 X3485 x 5680 Improved ventilation to distributor, window in head and holes in base. E.F.C.4/T.15-1-26; Tungsten contacts. The distributor head has remained clean and free from oil. The bottom half of condenser in pocket was covered with oil. The tungsten point, we had reported had developped a pip on the finger contact, has now increased in size and the corresponding hole in contact screw is too large for a good contact to be certain. The remaining surface is pitted. We have fitted a spare set of contacts and these taken off have been sent to Mr.CLARK. The engine at slow speeds had begun to missfire, one of the causes being the contact points. We have had no trouble with the coil, but should like to point out that dust finds it's way in through the wire conduits. The top of the coil was covered with dust when cap was removed. Bonnet & fittings. The bonnet and fittings have remained in good condition generally. We have had no trouble at this mileage with bonnet strips coming loose or breaking. The bonnet clips are not quite satisfactory. We still require more clearance between the clips on panels and brackets fastened to strips. The bottom of barrel of N.S. rear clip is now resting on the bracket when the bonnet is shut, with the result; that no load is on the clip; this has started it to chatter away. This condition quickly makes the bonnet unsafe. Engine guards. We have had very wet weather during the continuation of the test and engine guards have again become choked with grit, and the rear of engine dirty. We have observed that this is due to the dirt and water being flung on to the engine case and square front of gear box undershield, which diverts it upwards through the loovers. The gear box undershield being the chief offender. We would suggest that the gear box undershield be rounded off similar to the "Phantom" | ||