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).
Engine behaviour and a summary of suspension and steering performance.
| Identifier | WestWitteringFiles\S\March1928-May1928\ Scan010 | |
| Date | 7th March 1928 guessed | |
| contd :- -5- ENGINE. The behaviour of the engine is most gratifying. It is wonderfully smooth even at the highest revolutions. The valves bounce rather prematurely - 63 m.p.h. on 3rd. - this may have something to do with the loss of tappet clearance of the exhaust valves. The absence of detonation is still very satisfactory at low speeds. Petrol consumption is the best of any 40/50 HP: we have had in France though average speeds are higher. SUMMARY. This car demonstrates that the two features which are most affected when the range of car speed is increased are the Suspension and Steering. In both cases a considerable amount of damping is imperative at the upper end of the range if the best results are to be obtained, while at low speeds the damping can be dispensed with advantageously. In the case of the suspension, the Hartfords do provide a satisfactory means of getting the required variation. The steering suffers somewhat from the fact that the damping incorporated is not variable, but we consider that 15-EX as adjusted is a very reasonable compromise. Hs{Lord Ernest Hives - Chair}/Hm.{Capt. W. Hallam - Head Repairs} | ||