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).
Three methods for obtaining a square shoulder on 'Condor II' cylinder studs.
| Identifier | WestWitteringFiles\F\February1921\ Scan2 | |
| Date | 3rd February 1921 | |
| To-Sh. from E.{Mr Elliott - Chief Engineer} Copy to NY. [strikethrough text] EFC ORIGINAL 1922 EL/03/2/21. No. X4225. RE "CONDOR II" CYLINDER STUDS. RECEIVED. With further reference to memo EL/02/2/21 concerning the above, Mr. Royce is afraid that the wire ring suggested will tend to roll over, and he therefore considers that we should adopt one of the three proposals shown on the attached drawing Lec.1342. The three ways of obtaining a square shoulder against which to tighten the stud when screwing same into the crankcase are :- (1) By brazing a piece of tube to the stud rod before machining, as in fig. (1) (2) By jumping the collar into the bar. (3) By grinding the stud down from bar large enough to form a collar. Mr. Royce favours No.(1), as he thinks that with the right methods it will be cheaper than (2) or (3). In method No.1 the stud is made from bright nickel steel rod .312" diameter. The rod should be drill spotted where the collar is to be fixed, and placed in a rig under a fly press for punching the tube wall into the drill spot for the purpose of holding the tube during brazing. The rod can be registered in the correct position on an anvil, by dropping the punch into the drill spot before the tube is slipped on. The anvil may be a "V" block, and the rod may be made to rise to leave room for the tube to be pushed in position up to a stop after the rod has been clamped at one end. Brazing should be carried out by the pot method, in which the pieces to be joined are dipped in a pot of molten | ||