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 on car number 48 P.K., detailing the performance of the front wheel brakes, engine, and transmission.
| Identifier | ExFiles\Box 72\4\ scan0263 | |
| Date | 16th December 1924 | |
| X9770 ? S/W (Hs{Lord Ernest Hives - Chair}). CWB15/LH{Mr Haworth}16.12.24. CAR NO. 48 P.K. ------------- Your Hs{Lord Ernest Hives - Chair}6/LG15.12.24 received. In general, this car performed satisfactorily during the test, and had it not been for the marked increase in the transmission groan, the test would have been completely satisfactory. Dealing with individual parts: (1) FRONT WHEEL BRAKES. These performed wholly satisfactorily. The slow rate of wear is considered to be excellent. The slight groan on light application was present from the start and has not altered throughout, but with the damping that has recently been introduced into the system will, no doubt, be eliminated. The pressure required for application and the feel of the brake of this car are considered very satisfactory. At intervals throughout the trial, there has been a very slight tendency for the car to pull over to the nearside on application of the brakes. This has not been permanent, and has never exceeded what could be considered reasonable, owing to slight variations in the frictions in the two drums. (2) ENGINE. This has run well throughout the test. There has been a little trouble with carburetter setting due to the spindle of the air valve having been bent at some time whilst making an adjustment or cleaning. This spindle should be most carefully examined. The general adjustment of the engine has been well maintained, considering the little attention which has been given the car. During the last 200 miles a "whine" has developed, probably due to the dynamo. This was not definitely located, but must be, and corrected. (3) TRANSMISSION. The car has always had the regular transmission groan. At first, this was pretty well spread out over the 20 and 30 m.p.h. periods and was not, unduly noticeable. Steadily, during the running of the car, this periodic groan has become more concentrated on the two periods of 20 and 30 m.p.h. and considerably more acute; particularly at 30 m.p.h. It is considered that an improvement must be effected in this matter before the car can be considered suitable for sale. | ||