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 evaluation and test notes for an experimental car.
| Identifier | ExFiles\Box 170\3\ img187 | |
| Date | 6th June 1939 guessed | |
| F Rachel SIVDL C1S A II Oyp = file Exptl. Car. Licence RC{R. Childs} 7211. Engine is very good. Exhaust tuning could probably be improved. The intake "loaded" on a hill, a thing I scarcely remember since Silver Ghost. Due to water-heated intake? Either frame stiffness defective or engine mount needs improving both for rocking frequency (tramp and radiator shake) and for vertical frequency (sag vibration). Ride in rear seat good above 30, not so good below. I would test the actual ride rates and reduce front rate relative to rear. Rear suspension is distinctly "low plane" allowing "figure eight" or "sculling" action in rear axle and a rocking frequency which appears distinctly too high for best comfort. Steering very good. Handling excellent. Roll angle excellent. Cushions perfect. Silence excellent. Gearbox - lousy. | ||