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).
Test report sheet detailing troubles, mileage, and remedies for an original plate clutch servo on a 9-PK car.
| Identifier | ExFiles\Box 73\3\ scan0258 | |
| Date | 11th December 1924 guessed | |
| SHEET 4. TEST NO. 111. ORIGINAL WW. PLATE CLUTCH SERVO. 9-PK CAR. TROUBLES. | MILEAGE. | CAUSE OR REMEDY. Car in accident - rear axle and petrol tank damaged, body badly damaged. | 1374 | Repaired in Paris. Steering heavy and bad for road shocks. | | Pivots not getting sufficient lubrication (re-designed) Later type side steering tube springs improved shocks. Brakes very consistent - require excessive pressure. F.W.B's Jagger Brake application affects steering. | | Braking system discarded. Exhaust manifold cracked. Exhaust down pipe fouled by dynamo coupling. Exhaust throttle sticks. | 3991 | Exhaust system re-designed to overcome these troubles. Oil on front brakes from toggles. | | Toggle shafts fitted with oil baffles on later cars. A.T. speedometer failed. | 3972 | 3 side steering tube springs broken. | 3747 8971 | Later type springs completed 10,000 miles successfully. 2 exhaust valves burnt out. | 5228 6269 | Old type valves. Steering arm bolts stretched. | 6107 | Small dia. bolts. Valve spring broken. | 5679 | Windscreen frame broken - wing stay broken - two spare wheel carriers broken. | | TOTAL MILEAGE OF TEST - 12,868 | ||