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).
Design and alignment of engine tappets and push rods for the L.H. SS engine.
| Identifier | ExFiles\Box 19\3\ Scan044 | |
| Date | 22th February 1929 | |
| X.7772 RL/M22.2.29. E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} from R.{Sir Henry Royce} Hs.{Lord Ernest Hives - Chair} c. to SG.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} DA.{Bernard Day - Chassis Design} L.H. SS.{S. Smith} ENGINE. (1) I had not remembered that the tappets were not vertical but were inclined already towards the cyl. bore. (2) So that if we are prepared to accept that the tappets need not be in line with the push rod the L.H. is simple. (3) My measurement of the blue print shews that Sch.6. is the best XX with present timing wheels and SS.{S. Smith} completely interchangeable. (4) The left hand engine would, and should, also have desaxe tappets; if the tappet bore is truly vertical the whole comes in quite easily and interchangeable. (5) I have not the slightest hesitation in saying we shall never detect any ill effect from (2) so go ahead on these lines. (6) I did not like the R.H. desaxe, and not the L.H. (7) Make the push rod clearance as much as conveniently possible. BY.{R.W. Bailey - Chief Engineer} says we can increase it. R.{Sir Henry Royce} | ||