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 required sketches and production drawings for modifications to Wraith, Bentley, and Phantom III models.
| Identifier | ExFiles\Box 142\3\ scan0294 | |
| Date | 6th August 1937 guessed | |
| -2- SKETCHES ONLY REQUIRED. CTS.{C. Trot Salt - Carburation} Wraith Two experimental induction pipes are required as follows:- 1. As latest Wraith but with bore reduced to 1.400 dia. 2. As present production 25/30 but to be 1.400 bore right through and with necessary modifications to suit Wraith type hot spot (water) and 3 bolt flanges. J.B.D. Wraith 1. Scheme with the petrol pump outside the frame, and also one showing the petrol tank without the sump in the bottom. DRAWINGS SUITABLE FOR PRODUCTION GRY.{Shadwell Grylls} 1. Bentley rear axle pinion mounting to avoid the pre-load on the bearing being taken on the 1.B.A. studs. A sketch of this is available. 2. Raising P.III. front jacks 1" to avoid trouble reported on J2-EX. 3. Make P.III. and Wraith front jacks interchangeable. 4. Alter the internal locking of the Wraith hubs so that Bentley withdrawal tackle can be used. Present drawings need altering. 5. Crossmember like the Wraith one between the front dumb irons on the Continental P.III. continued | ||