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).
Static stiffness test results comparing a standard 40/50 chassis with a Continental Phantom chassis.
| Identifier | ExFiles\Box 17\3\ Scan193 | |
| Date | 9th March 1928 | |
| Hs{Lord Ernest Hives - Chair}/Tsn/LG9.3.28. CONTINENTAL PHANTOM FRAME - STIFFNESS TESTS ETC: A series of static tests have been done on complete chassis in order to settle two points :- (1) To determine the amount of frame deflection due to road shock perceptible at the steering wheel (a) with a standard 40/50 chassis (50-PH) and (b) with rubber engine feet and cast dash (17-EX Continental chassis) (2) The comparative torsional stiffnesses of the frames, one standard and the other with rubber engine feet. (1) Steering column movement. The front springs were blocked so as to remain rigid. The front wheels were then jacked up alternately a distance of 6", and the movement of the top of the steering column in 3 dimensions relative to the centre of the 3rd. cross member was measured with dial indicators. The movements were as follows :- Wheel Raised. Direction of Motion. 17-EX Continental Phantom. 50 PH Standard Chassis. O.S. front. R.{Sir Henry Royce} to L. .110 .100 F.{Mr Friese} to R.{Sir Henry Royce} .050 .060 Downwards. .012 .040 N.S. front. L. to R.{Sir Henry Royce} .170 .100 R.{Sir Henry Royce} to F.{Mr Friese} .056 .050 Upwards. .014 .043 It cannot be said therefore that frame distorsion due to road irregularities will be directly perceptible at the contd :- | ||