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).
Performance observations and issues with various vehicle components including the carburettor, brakes, engine, and clutch.
| Identifier | ExFiles\Box 4\9\ 09-page180 | |
| Date | 16th March 1926 guessed | |
| -2- really smooth roads, the note being much higher pitched than with the Dunlop traction tread. (5) Steel cam wheel in place of phosphor bronze wheel. There was no noticeable result of this change. (6) Modified carburetter with aluminium air valve. The carburetter was choking occasionally and needed to be set at least two notches rich to give good acceleration; it would appear that the jets were becoming choked with dirt. (7) Exhaust cut-out. This was much liked; it is not too noisy and makes quite a pleasant sound, which is a relief at times to the extreme quietness when making a long journey. (8) Brakes with modified and improved covers. No squeaks were observed. The Servo was somewhat hard in operation, but efficient. (9) Engine. There is nothing very special to remark on regarding the engine, which was on the vigorous side with some of the usual roughness present round 28 m.p.h. The slow running was rather irregular, probably due to the same cause as carburetter choking. (10) Clutch. This was poor, being rough and jaggering. It will probably improve with use. OWB CWd P.S. 1. It was noticed that switch button for instrument board lights could not be held down automatically. Is this right? Has not alteration as Phantom been standardised. 2. Petrol gauge quite unreadable without a periscope. Is new tank with reserve, better gauge, better filler etc as Phantom underway? CWd | ||