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).
Slipper flywheel clearances for the 20 HP chassis spring drive.
| Identifier | ExFiles\Box 74\3\ scan0279 | |
| Date | 19th June 1923 | |
| X.4221 To Sft.{Mr Swift} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Hs.{Lord Ernest Hives - Chair} c. to Sft.{Mr Swift} for Mr. Cox. By/Shn6/DB{Donald Bastow - Suspensions}19.6.23. RE. 20 HP CHASSIS - SPRING DRIVE. (SERRATED TYPE) E.51055 - SLIPPER FLYWHEEL CLEARANCES. X.4222 X.4221 Regarding the clearance between the inner face of the slipper flywheel and the outer surface of the wheelcase gearwheel rims, which was given verbally some time back as .100, we have just gone through our detail drawings and find that the range possible with our latest limits is from .138 to .064 (an average of .101). Mr. Bailey agrees to pass any erected engines to the lower dimension, but for future instructs that the clearance .100 to .075 be obtained by selective method. Our broadest limits ±10 occur on the fibre friction discs. The following features may also assist in obtaining this clearance :- 1. If it is required to free the pinion owing to the flanged nut being forced up the crankshaft taper, metal should be removed from the face of the bearing bush flange next to the crankshaft shoulder - not from the bush which beds against the flanged hub. 2. In lining up the wheelcase gears, the face of the Camshaft and Idler wheels should never stand forward from the crankshaft pinion. When we come on to the non-serrated type (E.52565) at Chassis No. 501, we find that the ±10 limits on the two fibre friction washers give a clearance range of .153 to .059 (Average .106). With the selective method it should, however be easily possible to get the .100 to .075 clearance. BY/Shn. | ||