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).
Comparison tests of a 40/50 Chassis - Series F with 15/52 and 14/52 ratio axles.
| Identifier | ExFiles\Box 113\2\ scan0133 | |
| Date | 9th May 1928 | |
| Hs.{Lord Ernest Hives - Chair} X1725 Mx{John H Maddocks - Chief Proving Officer}/MdM6/T9.5.28. We give below comparison tests of Standard 40/50 Chassis - Series F.{Mr Friese} Chassis No. 35-AL - weight with passengers 53 cwts, open test kit, roads dry, 10 miles per hour cross wind, fine day, and tests were made under same conditions and within 1 hour of each other. 15/52 Ratio Axle. Stanton. 10 m.p.h. 25 secs. Post to Tree. " 43½ " Ticknall. " 1 min. 2¼ " Pistern. " 1 " 12½ " 14/52 Ratio Axle. Stanton. 10 m.p.h. 22½ secs Post to Tree. " 42½ secs Ticknall. " 1 min. 0¾ " Pistern. " 1 " 4 " Pistern Hill record was taken starting from the third tree, beyond rail crossing. Mx{John H Maddocks - Chief Proving Officer}/McM | ||