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).
Photograph and reversed text describing a 'Tapley' Gradometer test rig attached to a car.
| Identifier | ExFiles\Box 113\2\ scan0167 | |
| Date | 11th November 1930 guessed | |
| Fig. 4 (Reversed text from back of page) ... is very thin, & takes a great amount of beating and abuse. The band is of Ordnance... which, when being checked, absolutely... General Description. The "Tapley" Gradometer weighs about 2.5 lbs., the dial is about 4" in diameter, and 1 1/2" wide... The drive is effected by means of a flexible shaft. (3) The maximum revolution per minute of the driving shaft may be varying from 500 to 2,000 revolutions per minute for the maximum graduation of the dial. Normally the revolutions per minute of the driving shaft correspond to 1 revolution per turn of the axle, and for revolution counters the drive ratio is 1:1. The driving shaft consisting of a 4 strand wire rope... the motion of the driving shaft is transmitted to the... The most general form of drive is by means of universal joint tubing coupling, permitting the instrument to be driven from any angle. | ||