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 to the exhaust choke valve control for the 40/50 chassis.
| Identifier | WestWitteringFiles\J\February1923\ Scan12 | |
| Date | 22th February 1923 | |
| TO BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer} c. to CJ. c. to HS.{Lord Ernest Hives - Chair} ✓ c. to HP. ORIGINAL 40/50 CHASSIS. EXHAUST CHOKE VALVE CONTROL. X4305 X3436 With reference to your scheme No.468, we have drawn over this a modification on the lines approved by Mr. Royce, in which the control rod and spring are both connected to one double lever on the valve spindle, and instead of using a slotted link, a take up lever is employed, acting on a loose lever floating on the throttle control shaft. The spring is anchored to one of the forgings carrying the clutch pedal mechanism. We should like the spring to be horizontal (for the position of lever shewn) if the undershield will permit. With regard to the position of the choke valve not becoming shifted we have shewn a dowel screw engaging with a slot cut in the exhaust downtake tube. This latter being made longer than hitherto. This dowel screw ensures and maintains the correct position of the choke valve, and can be unscrewed to facilitate removal of the exhaust downtake. It may be advisable to cut this slot in the downtake tube by means of a jig which locates by bedding on the union face on the top end of the tube, and also to take special care that the dowel screw hole is square with the silencer body. E.{Mr Elliott - Chief Engineer} [Stamp] RECEIVED Hs{Lord Ernest Hives - Chair} FEB 28 1923 | ||