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).
Continued page discussing the calculation of car speed and retardation from braking test records.
| Identifier | ExFiles\Box 29\1\ Scan236 | |
| Date | 22th July 1926 | |
| Hs{Lord Ernest Hives - Chair}/RnL/T22.7.26. -3- Contd. The number of wheel revs. in the second before braking, which can be read off on the record, gives the car speed in m.p.h. The car speed in m.p.h. being accurately known and the distance to rest accurately measured, retardation in feet per second per second can be calculated. If further information is required the whole record can be reduced to a velocity/time and acceleration/time basis. It is possible to make a large number of tests in a short space of time with this instrument. The results are remarkably consistent. In spite of having carried out a number of the tests described above, both on Brooklands and on the road, the records have never indicated retardation approaching 30 ft. per sec. per sec. Space/time diagrams of acceleration and retardation can be obtained in exactly the same way as these braking records, and can be reduced to acceleration/ time records. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||