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).
Data table comparing original steering geometry with the effects of rolling the car, under varying applied torque.
| Identifier | ExFiles\Box 95\1\ scan0157 | |
| Date | 10th December 1934 guessed | |
| (AS ON R.H. CORNER) ORIGINAL STEERING GEOMETRY WHEELS STRAIGHT EFFECT OF ROLLING SPECTRECodename for Phantom III CAR TO LEFT (SHORT BOTTOM LINKS) WHEELS ON FULL R.H. LOCK TABLE HEADERS: APPLIED TORQUE LBS. FT. FRAME ANGLE LEAN OF WHEELS - O.S. LEAN OF WHEELS - N.S. TRANSVERSE LEAN N.S. TOE IN ANGULAR MOVEMENT OF STEERING WHEEL VARIATION IN DIRECTION OF FRONT WHEELS - O.S. VARIATION IN DIRECTION OF FRONT WHEELS - N.S. CASTOR ANGLE FIRST TABLE DATA (ORIGINAL STEERING GEOMETRY, WHEELS STRAIGHT): ROW 1: 0, 1/2°, .5° IN, .44° OUT, 3.5°, .550, 0, NOT MEASURABLE, 1° ROW 2: 580, 1 1/4°, 1.63° IN, 1.48° OUT, 3 1/4°, .650, 4.2° DEC., NOT MEASURABLE, (empty) ROW 3: 1160, 2 1/4°, 2.66° IN, 2.34° OUT, 3.3°, .850, 8.0° DEC., NOT MEASURABLE, (empty) ROW 4: 1740, 3°, 3.7° IN, 2.96° OUT, 3.5°, 1.0, 11.5° DEC., NOT MEASURABLE, 1.29° INC., 1/2° SECOND TABLE DATA (EFFECT OF ROLLING, WHEELS ON FULL R.H. LOCK): ROW 1: 0, 1/2°, .29° OUT, .22° OUT, 3.8°, (empty), 0, NOT MEASURABLE, 1° ROW 2: 580, 1 1/4°, .29° IN, .74° OUT, 3.9°, (empty), 13.4° DEC., NOT MEASURABLE, (empty) ROW 3: 1160, 2 1/2°, 1.18° IN, 1.48° OUT, 4.5°, (empty), 23.4° DEC., NOT MEASURABLE, (empty) ROW 4: 1740, 3°, 1.77° IN, 2.07° OUT, 4.5°, (empty), 29.5° DEC., NOT MEASURABLE, 1.66° INC., 1/2° | ||