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).
Axial clearance on rocker lever basses for a Phantom new aluminium head.
Identifier | ExFiles\Box 8\4\ 04-page090 | |
Date | 4th June 1928 | |
Hs{Lord Ernest Hives - Chair} BY/CS. c. Hs.{Lord Ernest Hives - Chair} c. Gft. V615 BY5/G.4.6.28. PHANTOM - NEW ALUMINIUM HEAD. RE CLEARANCE IN AN AXIAL DIRECTION ON THE ROCKER LEVER BASSES. At the moment our limits allow for clearance from .003" to .006". This amount is, however, inadequate owing to the fact that when the nut is tightened up to lock the eccentric adjusting scheme the Duralumin is liable to compress slightly and therefore take up the clearance. It will be necessary to modify our clearances so as to make a minimum .005" with a maximum .008". In the meantime I suggested we might try a smaller hexagon nut for locking up the adjusting eccentrics on the ends of the tube. This is being tried out, and may be brought in later, but in the meantime the increased clearance is essential. On the other hand of course anything that will keep the dimensions of the locked up pieces, that is the bosses on the brackets and the eccentric adjustment closer to actual size would be actually advantageous. Examine the limits to see that they are the smallest that we can allow as a working proposition. If this last point is not quite clear will BY/CS. kindly see me. BY.{R.W. Bailey - Chief Engineer} BY | ||