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 E.A.C. Carburetter, comparing the low-speed jet cone on the New Phantom with the Silver Ghost.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan122 | |
| Date | 1st August 1925 | |
| R.R. 493A (50H) (D.B. 175 25-9-24) J.H.D. EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}4/LG24:8.25. ORIGINAL To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to R2. E.{Mr Elliott - Chief Engineer} c. to DA.{Bernard Day - Chassis Design} EY. c. to Wor{Arthur Wormald - General Works Manager}! E.A.C. CARBURETTER. Y6080 X2768 The taper on the cone of the low speed jet on the New PhantomCodename for PHANTOM I is exactly the same as we used on the Silver Ghost. The throat sizes are also the same. Since your last criticism on this point we have compared the range on the Phantom with the range on a Silver Ghost on two actual cars, and find it to be approx. the same. On the 20 HP. there is less range on the control for the low speed jet. When your car (46-PK) arrives at the Works we will check over the control for the low speed jet and make certain that it is similar to the standard production. If it is so, we will fit a cone with the reduced angle before it is returned to you. Hs.{Lord Ernest Hives - Chair} | ||