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).
Graph and data table comparing the ratio of movement of the steering wheel to the pendulum lever for the New Phantom and Marles steering systems.
| Identifier | ExFiles\Box 28\2\ Scan011 | |
| Date | 3rd March 1926 guessed | |
| NEW PHANTOMCodename for PHANTOM I (7/8 WORM LEAD) AND MARLES STEERING THE RATIO OF MOVEMENT OF STEERING WHEEL TO PENDULUM LEVER. Y-Axis Label: ANGLE OF STEERING WHEEL X-Axis Label: ANGLE OF PENDULUM LEVER Graph Line Labels: MARLES STEERING NEW PHANTOMCodename for PHANTOM I (7/8 WORM LEAD) STEERING RIGHT HAND LOCK LEFT HAND LOCK Table Data: HEADINGS: ANGLE OF PENDULUM LEVER DEG. | MARLES STEERING (R.H. LOCK / L.H. LOCK) | NEW PHANTOMCodename for PHANTOM I STEERING (R.H. LOCK / L.H. LOCK) DATA (Angle | Marles | New PhantomCodename for PHANTOM I): 0° | 0° | 0° 1° | 8° | 9.1° 2° | 16° | 18.2° 3° | 24° | 27.3° 4° | 32° | 36.4° 5° | 40° | 45.5° 6° | 48° | 54.6° 7° | 56° | 63.7° 8° | 64° | 72.8° 9° | 72° | 81.9° 10° | 80° | 91° 12° | 96° | 109.2° 14° | 112° | 127.4° 16° | 128° | 145.6° 18° | 144° | 163.8° 20° | 160° | 182° 22° | 176° | 200° 24° | 192° | 219° 26° | 208° | 238° 28° | 224° | 256.5° 29° | 232° | 266° 30° | 240° | 275.5° 31° | 248° | 285° 32° | 256° | 294.5° 33° | 264° | 304° 34° | 272° | 313.5° 35° | 280° | 323° 36° | 288° | 332.5° 37° | 296° | 342° 38° | 304° | 351.5° 39° | 312° | 361° 39.5° | 316° | 365.75° TABLE FOOTER: Marles Steering: 320° AND 40°, END OF TRAVEL New PhantomCodename for PHANTOM I Steering: 368.5° AND 40.5°, END OF TRAVEL | ||