Accelerometer test results for acceleration on various hills using different gears.
| Identifier | ExFiles\Box 113\2\ scan0009 | |
| Date | 15th December 1922 | |
| ACCELEROMETER TESTS 15.12.22. Acceleration on Hills as measured by Accelerometer. Top gear. Ashbourne hill - average reading 21-19 m.p.h. 2.2 ft.p.s² (1 in 13) Matlock Bank - " " 22-12 m.p.h. 2.3 (1 in 8 ) Middle gear. Ashbourne Hill - average reading 5-10 m.p.h. 3.6 ft.p.s² (1 in 13) Swinscoe Hill - steady reading 10-20 m.p.h. 3.2 " " " (1 in 11) Middleton Hill - steady reading 10-20 m.p.h. 3.2 " " " (1 in 12) Matlock Bank - Steady " 5-10 m.p.h. 3.6 " " " (1 in 8) 10-17 m.p.h. 4.5 " " " Bottom gear. Swinscoe Hill - Average reading 5-10 m.p.h. 5.8 " " " (1 in 11) Buxton road - Steady reading 10-15 m.p.h. 4.7 " " " out of Ashbourne Market (1 in 8) Middleton Hill - Average reading 15-20 m.p.h. 3.4 " " " (1 in 11) (would not hold car at all) Matlock Bank Just above Smedley) Steady " Street (1 in 6½) 5.8 " " " Accelerations in these readings do not represent actual accelerations over the ground, but tractive effort accomplished by the engine. It would be impossible to accelerate at 5.8 f.p.s² on bottom on a level road, owing to the immense amount of energy used in overcoming moment of inertia of reciprocating and rotating parts in the engine and car. Hs {Lord Ernest Hives - Chair} /R. | ||
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).