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).
Improvements to the distribution board cutout contact point, including results from a 14,000-mile road test.
| Identifier | WestWitteringFiles\O\2April1926-June1926\ Scan149 | |
| Date | 22th May 1926 | |
| Expl. Report. To R.{Sir Henry Royce} from EFC. c. BJ. PN.{Mr Northey} c. E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} c. By.{R.W. Bailey - Chief Engineer} Wor.{Arthur Wormald - General Works Manager} c. Rg.{Mr Rowledge} ORIGINAL X.4105C- DISTRIBUTION BOARD CUTOUT CONTACT POINT EXPERIMENTS. Further to the rigid fixed contact point support for the lower contact point on the cutout, standardised by sheet 5.2.25, it would appear that we have effected still further improvement in the operation of the cutout by a modification of the top contact point spring support, shown on the accompanying drawing. This has a spring with narrower (.150") neck, and a small rigid backing plate which effectually causes the whole possible sliding motion of the top contact point on the lower contact point to take place, some portion of which would otherwise be absorbed by bending which takes place near the fixed end of the spring. There has recently arrived back at the Works 20 HP. chassis 10-GIII from its 10,000 mile test in France, and a distribution board with cutout contact point support of this type has run through this test, and in fact completed in all 14,000 miles, satisfactorily. in accordance with the following paragraph in my assistant's report AC.75 :- "The cutout fitted to 10-GIII which has completed practically 14,000 miles running is in very good condition. Wear is very slight and the sliding action is still good. (EFC/F.J. Allen.) From this and other evidence below, this item is considered to be an improvement on the present standard." Contd. | ||