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).
Aero engine programme, including progress on the Falcon X and Eagle XVI engines.
| Identifier | WestWitteringFiles\N\2July1925-September1925\ Scan103 | |
| Date | 1st September 1925 | |
| ORIGINAL FROM R.{Sir Henry Royce} to HS.{Lord Ernest Hives - Chair} re. AERO ENGINE PROGRAMME, AND GENERAL. R1/M28. 9. 25. Handwritten: X1906 X4114 Y3804 (1) Col. Fell was here for the weekend and saw the work going on. Some matters were discussed which were most profitable (see 4 & 5.) (2) Col. Fell wishes that Falcon X. should be pushed forward with all possible speed, secondly should come Eagle XVI., and Condor can wait. (3) The conference between CJ. BJ. RG.{Mr Rowledge} WOR.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} & R.{Sir Henry Royce} is to take place early next week. (4) A double spark 8 cyl. magneto is to be forthcoming so that Eagle XVI. need only be fitted with 2 magnetos. We are to send specification to Air Ministry and Messrs Watford, and a point we settled was that we were to be responsible for the advance and retard - 2 fixed positions, starting and running. This makes the magneto problem much easier. They are to provide our system of adjustment of the timing which is to be standard on this machine. (5) The supercharger (25,000 RPM. gear driven.) has been designed for both Eagle XVI. and Falcon X. It was pointed out the ball bearings for the rotor were giving trouble, so we decided on plain bearings in revolving bush, and that rotor shall be made in steel and duralumin, to see which is best. (6) We are concentrating on the cyl. design having valve seats screwed in hot, and notched to lock with punched burrs. This is like the earliest and most advanced drawing. Eagle XVI. retains its loose head, Falcon X. has 6 cyl. block. (7) My impression is that there will soon be more work in the hands of Derby than they can do quickly, (drawing, and especially pattern making.) I do not know how BY.{R.W. Bailey - Chief Engineer} arranges the work, but it might be that WW. designs as they arrive are handed to a leading draughtsman, who must see that he gets the information he requires to finish detailing the general arrangement given to him. He must write, telephone, or travel, to WW., but in no-wise let the work stop for want of information. (8) Some pattern making may require to be put out, or swash-plate starter unit, or something less urgent, must be put aside for Eagle XVI. and Falcon X. (9) There is a drawing here which shews the whole of the Falcon X. design, except the drive to the camshaft. This drawing could be worked upon at Derby, and the work sent to WW. for approval, while (1) | ||