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 wear of various vehicle components after testing.
| Identifier | WestWitteringFiles\M\2April1925-June1925\ Scan118 | |
| Date | 10th June 1925 | |
| EXPERIMENTAL REPORT. REF: GMN/Cra10.6.25. measurable wear on these gears. The servo mechanism is quite O.K. We believe that new cams are being sent out to lessen the tendency of fierce braking. PEDALS 'D' TYPE TO L.O.P. F.53584 - Spring F.53584 fitted to brake pedal. The pedal bearings are on the slack side. We do not consider that wear has taken place. These are as they were fitted. STARTER MOTOR. This has functioned O.K. REAR AXLE & BRAKE MECHANISM. We have dismantled brake drums and found these in good condition, as also are the shoes. We have not noticed any periods from axle, which we consider to be good for quietness. Rear springs and bearings appear to be O.K. Rear shock absorbers - as we were not satisfied with the damping effect of the rear shock absorbers, we dismantled same from frame, and tested the friction load. We have omitted the first stage. The friction in lbs. was initial pull 50 lbs., after which 28 lbs. only were needed. We examined plates and found a very poor surface bedding of copper plates. They were also inclined to be on the tight side on the splines. After taking hard spots off plates, and freeing splines, we have got a friction poundage of 47. PROPELLER SHAFT. This has not developed any rattles. The universal joints appear to be in a good condition. There is a slight amount of oil thrown out of rear and front universal covers. The instructions are '1/2 a gun full of oil in each universal joint after every 500 miles'. We shall cut this down to half a gun full for both, to see whether it is an excess of oil or if it is thrown out by centrifugal force. SIDE HAND BRAKE MECHANISM. This is quite O.K. ELECTRICAL FITTINGS. These are O.K. generally. The points of cut-out are burnt and pitted very badly. Earthing wire to accumulator was fouling brake rope, and the insulation had become damaged. This we have rectified. Accumulator suspension - we found that the accumulator box was chattering sideways, owing to the supporting contd :- | ||