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).
Comparative table of steering characteristics for different Phantom chassis series.
| Identifier | ExFiles\Box 106\3\ scan0140 | |
| Date | 2nd February 1927 guessed | |
| PHANTOM CHASSIS. STEERING. TABLE: Column 1: TYPE OF CHASSIS AND STEERING. Row 1: ++ B.2 series. 9.500 pendulum lever. Row 2: C.2. series. 11.000 pendulum lever. Column 2: Angular mvt. of stg. wheel due to drop of axle on full rebound assuming solid s.s. tube. Row 1: Nil. Row 2: 15º Column 3: Linear mvt. of pendulum lever ball pin. Row 1: — Row 2: .150 Column 4: Max: dfln. of s.s. tube spring. Row 1: — Row 2: .400 (.200 each end.) Column 5: Force necessary at rim of stg. wheel to hold pendulum lever stationary and allow s.s. spring to absorb the mvt. Row 1: XX — Row 2: 15.9 lbs. Column 6: Angular mvt. of the stg. wheel after the s.s. tube spring has been compressed to the stop. Row 1: — Row 2: Nil. Column 7: Force at rim of wheel to allow springs to absorb movement of ball due to 1.500 axle & rebound. Row 1: 5.3 lbs. Row 2: 5.3 lbs. Column 8: Remaining angular mvt. of wheel. Row 1: Nil. Row 2: Nil. NOTES: Note XX - The results in this column are based on a 100% mech: efficiency gear - therefore adjustment must be made to suit conditions. WW Note that full rebound on B2. No deflection occurs but at 1.5 rebound the point is on the arc l-c & a deflection is produced. For B2. series chassis with 9.500 pendulum lever, x & y are equal i.e. △ abc is isosceles & no movement occurs at a.{Mr Adams} | ||