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).
Technical report on the performance and condition of various car components including the carburettor, exhaust, steering, and engine parts.
| Identifier | ExFiles\Box 5a\4\ 04-page178 | |
| Date | 14th December 1934 guessed | |
| - 3 - CARBURETTOR NR. M?. TYPE. Easy starting has been obtained in the cold weather, but the car cannot be driven straight away without strengthening up until the engine is warmed up. The carburation appears to be on the weak side for acceleration from low speeds. We have not had any failure with the carburettor. EXHAUST FITTING RS.{Sir Henry Royce's Secretary}1436 Buchlied 123.4099 Oil shield over front end of silencer RC.{R. Childs}6096 AUSTINITIC MANIFOLD. Special steel Austinetic centre studs not waisted. Latent type silencer. There has been an exhaust boom at 30 M.P.H. during the latter part of the mileage it has not been so pronounced and in the rear seats it is barely noticeable. The guard over the front end of the rear silencer has stopped the smell of all fumes that was previously so noticeable. The exhaust manifold, with bridge pieces to overcome the fracture of the pipe is not quite right, and has not prevented the contraction that takes place. The manifold has contracted to the limit of the elongated holes, and it is only just possible to withdraw it off the studs. It would appear that the bridge pieces should be on the underside, instead of at the rear as at present. The Austinetic steel centre studs have prevented the stretching of those studs that has been so prevalent. The anchorage of the rear silencer has squashed, and lubrication of the spherical joint was necessary. [Handwritten in left margin: WYMAN] STEERING. Upon trying this car, after having become used to the lower geared steering of the Cadillac, it appeared to be too direct. The ratio, however, is approximately 2% lower than standard, checked against a standard car. We are of the opinion that a slightly lower geared ratio would give a steadier steering. The selectivity has been improved by fitting Bentley type side steering tube springs. There have been no violent shocks from the steering wheel, an improvement over M?. as previously fitted. When running over pavé and rough road surfaces, joggles of the wheel are frequent. It is light for manoeuvring and self centres readily. Oil leaks from the split bearing at the bottom of the column. [Handwritten in left margin: Hr Kelly] CRANKSHAFT DAMPER. STANDARD. The damper and friction fabrics are in a good condition. There has been no sign of crankshaft periods. The friction poundage at the finish of the mileage was 16 lbs. at 17 1/2" radius. A considerable amount of carbon sludge was on the inside faces of the damper fly wheels. WATER PUMP JOINT TO CYLINDER BLOCK. The joint of the water inlet to the cylinder block is a cause of trouble, and is invariably leaking. We had to fit a fresh jointing washer early on in the mileage. The present one has again started to leak slightly. The trouble has been brought to the notice of R.{Sir Henry Royce} | ||