The investigation and adjustments made to car 24-EX following a steering complaint.
| Identifier | ExFiles\Box 11\3\ 03-page544 | |
| Date | 22th November 1931 | |
| RM {William Robotham - Chief Engineer} x7941 To Worr. from G.W.H. c.c. to Hs. {Lord Ernest Hives - Chair} Hotel de France, Chateauroux(French test region), FRANCE. 22/11/31. Re. 24-EX. I called at the Paris Depot to your instructions to assist with the complaint of steering with 24-EX. The following features were dealt with. (1) Shock dampers were taken down and examined. I found that the N.S. front damper was not working correctly owing to the ball valve for the air release having no clearance, the adjusting screw having been screwed down too far, the aluminium washer being flattened out. This also prevented the flow of oil to the gudgeon pin of the piston. The O.S. front damper had not been brought up to the present standard, i.e. no oil supply to the gudgeon pin. The high pressure valve in this damper had the valve drilled whereas the O.S. had no valves drilled. The poundage was made 120 L.P. and 120 H.P. The rear damper poundage was also made 120 L.P., 120 H.P. (2) The cross steering tube was taken down and attention was paid to the ball contacts, a wrong bijur had been fitted to the supply for the N.S. The friction load was made 18 lbs. (3) Lean of pivots checked, 2.5° N.S., 2.2° O.S. (4) Side steering tube springs had been adjusted up with one .010" washer at either end by Paris; this was left. (5) Tyre Pressures. Rear when checked were 29 lbs. These were made 37 lbs. Front tyres 35 lbs. were brought up to 40 lbs. The car was not ready for testing until after dark on the 10th inst. and it was required for the 11th., therefore I came on to Chateauroux(French test region) and started 18.G.IV on its mileage, returning to Paris on the 19th. (6) I took exception to the discs fitted to the wheels on this car as the mechanism for holding the discs, I considered was too heavy and out of balance centrally, they were therefore dismantled. Hm. {Capt. W. Hallam - Head Repairs} and myself tried the car, I personally thought that the steering was quite stable at speeds of 60-70 miles per hour. At the high speeds shocks were felt on the steering wheel, self centreing was up to standard. The steering in my opinion was up to our standard left hand car. The other features Hm. {Capt. W. Hallam - Head Repairs} has reported upon. G.W.Hancock G.W.H. | ||
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).