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).
Weight breakdown of components for Continental Phantom III steering.
| Identifier | ExFiles\Box 96\4\ scan0127 | |
| Date | 11th March 1937 guessed | |
| Rm{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/FJH{Fred J. Hardy - Chief Dev. Engineer} Weight Saving. Continental Ph.III Steering. Lbs. Ozs. Mounting 9 Cam. 1 15 Control Quad. 10 Outer Tube. 2 11 Rock Shaft and roller. 2 2 Box, covers and Nose Piece. 3 12 Pend lever. 6 Centre lever. 1 4 Side Stg. levers. (2 off) 1 8 Centre lever 2 0 Joints. 1 8 Estimated. 19 5 | ||