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).
Report comparing frame twist percentages between two car models at various front wheel lifts.
| Identifier | ExFiles\Box 17\3\ Scan195 | |
| Date | 10th March 1928 guessed | |
| contd :- -3- In the following table α is the twist at A: and β that at B. β/α is shewn as a percentage for various front wheel lifts. 17-EX. 50 PH. Wheel lifted. β/α % average. β/α % average. O.S. 2" 56.6 ) 63.1 ) 4" 62.1 ) 60.3% 64.8 ) 65.0% 6" 62.1 ) 67.1 ) N.S. 2" 62.4 ) 74.5 ) 4" 66.1 ) 65.8% 72.5 ) 73.4% 6" 68.9 ) 73.2 ) We cannot explain why different results are obtained with the two front wheels. The explanation of the percentages with the std. car being higher than with the Continental Phantom we think is in accordance with expectations. If the twist in the portion A - B is small, then that in the portion B - C will be a large proportion of the total. We think this is accounted for in the standard car by the rigid engine feet acting as a tubular cross member and suppressing twist in that part of the frame. hs{Lord Ernest Hives - Chair}/S.S.Tresilian. | ||