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).
Modifications and performance of the Phantom relay advance mechanism.
| Identifier | ExFiles\Box 48\2\ Scan423 | |
| Date | 18th April 1926 | |
| To E. {Mr Elliott - Chief Engineer} HS {Lord Ernest Hives - Chair} )from R. {Sir Henry Royce} BY. {R.W. Bailey - Chief Engineer} EFC. {E. Fowler Clarke - Electrical Engineer} )(Le CanadelHenry Royce's French residence) X8796 RL/M18.4.26. Rec'd at WW. evening of 21.4.26. c. to BJ. WOR. {Arthur Wormald - General Works Manager} DA. {Bernard Day - Chassis Design} RG. {Mr Rowledge} PHANTOM RELAY ADVANCE. X.8685. X.8796. You will remember that I have pointed out that the above can be made to work quite satisfactorily with much lower pressure oil, without noise, and with sleeve magneto. 7-EX. is so working. The scheme I want adopting is (1) only slight friction, say 1 lb., on magneto rocker, just enough to damp the vibrations due to elasticity, (2) spring on magneto rocker reduced or no spring at all over the oil servo motor, (3) considerably shorten the connecting rod from the governor to the control valve so as to get a small advance (say 10°) as soon as oil pressure sufficient (say 10 lbs) and so make the most of the governor stroke, and anticipate all lag due to valve clearance, leakage, etc. My impression is that the advance on 7-EX is more like dotted lines A & B instead of full line C. [Graph showing ADVANCE vs {J. Vickers} REVS from 250 to 2500, with three curves labelled A, B, and C] Well Hs. {Lord Ernest Hives - Chair} let someone report on this and get the corrected scheme on the next 10,000 miler - i.e. EAC.8 I fear we have been going the right way to spoil this apparatus. R. {Sir Henry Royce} | ||