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).
The cause of sticking throttles in new Phantom engines due to carbon deposits, and a recommendation to standardize a modification.
| Identifier | ExFiles\Box 66a\1\ scan0134 | |
| Date | 1st August 1926 | |
| BY.{R.W. Bailey - Chief Engineer} c. Hs.{Lord Ernest Hives - Chair} c. Wor.{Arthur Wormald - General Works Manager} for Mx.{John H Maddocks - Chief Proving Officer} K8080 EP{G. Eric Platford - Chief Quality Engineer}11/H17.8.26. re. New PhantomCodename for PHANTOM I Engine Throttle Sticking. This point has been raised on several new cars as taking place after delivery. Inspection of the throttle revealed the fact that the stickiness appeared to be due to the formation of carbon and a gummy deposit. The Repair Dept. point out that they have on several occasions of this complaint eased off the sharp edge of the throttle where it comes in contact with the barrel. In view of the improvement which the Repair Dept. state has been maintained by taking this action, I recommend that this slight modification should be standardised. This trouble has not been very serious with new cars on test, but we certainly have had a lot of it after the cars have been in service for a short time. An important point in connection with this throttle is to make sure that the butterfly finds its correct position when closed and that there is end play at each end of the spindle in this position. [Handwritten text] 010 Rad running outside EP.{G. Eric Platford - Chief Quality Engineer} A/c gh agrees to Drg. alter. | ||