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).
Complaints and proposed solutions for Phantom & 20HP models regarding springing, brake servo, and throttle sticking.
| Identifier | WestWitteringFiles\P\2October1926-December1926\ Scan064 | |
| Date | 18th November 1926 | |
| TO BG.) FROM R.{Sir Henry Royce} HS.{Lord Ernest Hives - Chair}) R2/M18.11.26. [Handwritten, struck through] Go to WOR.{Arthur Wormald - General Works Manager} BY.{R.W. Bailey - Chief Engineer} Dr. E.{Mr Elliott - Chief Engineer} ORIGINAL [Stamped] PHANTOM & 20HP. COMPLAINTS. [Handwritten Annotations] X 4117 / X 4118 X5770 / X8770 Referring to HS{Lord Ernest Hives - Chair}3/LG161126., to stop the complaints on the Phantom we must take some action quickly. PHANTOM SPRINGING. Naturally we should change the springs on any cars complained of so as to give ample flexibility at the back, and our standard flexibility at the front. BRAKE SERVO. It is important that the flexibility be introduced into the servo mechanism to prevent jaggers on all back number cars at once. PHANTOM THROTTLE STICKING. I believe the only cure for this is roller bearings on the throttle spindle itself. Even if the governor shaft is fitted with plain bearings, and is correctly fitted up and lubricated, the whole apparatus should give no trouble. But the lubrication of the throttle spindle is not effective and lasting. I want HS.{Lord Ernest Hives - Chair} to agree to this because I understand that to put ball bearings in the governor shaft requires a new bend, and will not cure the banging in the silencer anything like so effectively as putting the roller bearings in the throttle shaft. Regarding Sch. 809. it is noticed that the slot for the throttle disc is too long. there should be two flats on the throttle disc extended to the dia. of the larger portion of the spindle. The slot in the spindle should be squared out at the ends so as to fit the throttle disc. The spindle should have clearance endwise so that the throttle disc controls the end location when shut. The throttle disc should slide through the slot so as to bed correctly and equally top and bottom. We do not mind if the shut angle is 20° instead of 22°, but 12° certainly may permit, or cause, the throttle to jam when closed. Great care will be necessary to keep the larger dia. of the throttle clear of the holes, but excessive clearance cannot be allowed, or there will be leakage. We understand that a new spray chamber will be necessary for the carburetter. Whether the existing spray chambers can be machined in such a way as to permit of the roller bearing being fitted we do not know: it should be investigated, and we (1) | ||