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).
List of modifications for the Phantom Engine 'Z' series and the next car for France.
| Identifier | WestWitteringFiles\N\October1925-December1925\ Scan15 | |
| Date | 6th October 1925 | |
| TO BY.{R.W. Bailey - Chief Engineer} HS.{Lord Ernest Hives - Chair} FROM R.{Sir Henry Royce} (BY.{R.W. Bailey - Chief Engineer} is struck through) C.c. to CJ. BJ. E.{Mr Elliott - Chief Engineer} (entire line is struck through) ORIGINAL PHANTOM ENGINE. MODIFICATIONS FOR 'Z' SERIES, X8770 AND NEXT CAR TO FRANCE. X8940a (1) IGNITION. Magneto with spring instead of friction to prevent sleeve vibrations affecting the controls: fume trap, and extra ventilation to battery ignition. (2) EXHAUST. Exhaust silencer with Derby modification, but arranged to be built as sketch-(drawing for this from WW.) (3) CON. RODS. Con. rods should be with mild steel bushes. (4) LUBRICATION. Overhead oiling reduced to 6 ft. head,and drilling to ends of inlet valve rockers deleted. (5) CLUTCH. Clutch & flywheel lightened, and altered to whole surface spring for smooth engagement, and to stop more quickly. (6) CARBURETTER. Small dia. induction pipe in aluminium, water-heated induction pipe, aluminium carburetter, throats slightly raised to prevent petrol dribbling back, throttle spindle location to improved scheme, and improved filter in float chamber. (7) IGNITION. Distributor with improved ventilation, and trap to exclude breather gas. (8) Slipper flywheels dowelled together. (9) Oil gallery pipes cover. (10) Valve spindle packings improved. (11) Felt strip on undershields. (12)H Control balls fixed in levers to improved scheme. R.{Sir Henry Royce} [Circular stamp text: RECEIVED 9 OCT 1925] | ||