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).
The condition of a Delco Remy ignition distributor, valves, and a Borg and Beck flywheel and clutch assembly.
| Identifier | ExFiles\Box 83\2\ scan0025 | |
| Date | 21th May 1937 | |
| - 3 - HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}1/VS.{J. Vickers}21.5.37. Delco Remy Ignition Distributor and Governor. General condition satisfactory, there being no wear on contact-points, cams, spindle and bearings. The tower, however, wobbled rather badly in its alum. base, and in view of the increase in weight of the unit over the R.R. type, we consider the bearing surface here inadequate. Most of the wear has occurred in the alum. base rather than on the tower-spindle, but it is not more than .0015" at the worst spot, so that the initial clearances given to these governors is excessive. There was no side-play in the distributor spindle. (For report on previous case of "wobble" on these distributors see HPS{Horace Percy Smith - Experimental Factory Mgr}/RH.{R. Hollingworth}1/CB.17.3.37.). Valves. As these were all new and had only done 150 miles, no measurements will be taken until they have been tested for a further period. Trouble has been experienced with the original valves, four of which failed due to overheating. This was caused by inefficient cooling by the cylinder head in which the water-flow was restricted in the vicinity of the valve-guides. This matter has received the attention of Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell} Flywheel and Clutch LOP.GB.2100. Incorporating Borg and Beck Clutch 10.A.6. ventilated, with .045" cushioning. General condition good, though the friction-linings were greasy and the centre plate was rusty, due to the ventilated clutch-casing. The average "cushioning" was .0292" and the compressed thickness varied between .307" - .303", the average being .3048". This represents wear of approximately .030". The driving lugs of the pressure-plate and the reinforced slots in the clutch-cover did not appear to have worn much. The following are the total clearances between lugs and cover taken in clockwise order :- 1st. (B.D.C.) .007" - .0095". 2nd .004" - .009". 3rd. .006" - .010". The friction-surface of the pressure-plate was slightly tarnished but otherwise in good condition. Pressure appears to have been uneven on the fingers. continued. | ||