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).
Cost-reduction modifications to the Phantom III Oil Level Indicator float arm.
| Identifier | ExFiles\Box 91\1\ scan0523 | |
| Date | 15th September 1937 | |
| E.{Mr Elliott - Chief Engineer} Dept. c. to Rm.{William Robotham - Chief Engineer} c. to RD. c. to RHC.{R. H. Coverley - Production Engineer} DA.{Bernard Day - Chassis Design}7/G.15.9.37. PHANTOM III - OIL LEVEL INDICATOR. We send herewith E.CD.76 Revised Float Arm for Oil Level Indicator. This drawing calls for further modifications for reduction of cost over the design shown on LeC.5440 and LeC.5506. A request was made in RHC{R. H. Coverley - Production Engineer}/SB.{Mr Bull/Mr Bannister}2/FH.9.9.37. to make the float arm from strip steel .750 wide by 14 SWG. thick. In order to keep the float at levels to give a correct reading on the indicator, it is essential to maintain a certain balanced load relative to cork size, and to do this when using .750 wide strip the thickness must be 10 SWG. The following cost reducing features are also included in the new design :- (a). The spherical end of the float arm is shown integral with the long arm instead of being a separate part riveted on. (b). The number of the rivets for fixing cork to arm is reduced from 3 to 2, as the three rivets in line shown on WKS.332 weakens the cross section of the corks too much, and two rivets should be sufficient for the purpose. Will you please revise the details and instruct the parts to be made for fitting to chassis 39-EX. for experimental test. DA.{Bernard Day - Chassis Design} | ||