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).
Tabular comparison of steering geometry measurements for a Spectre car under roll conditions, with both original steering and short bottom links.
| Identifier | ExFiles\Box 17\4\ Scan103 | |
| Date | 10th December 1934 guessed | |
| EFFECT OF ROLLING SPECTRECodename for Phantom III CAR TO LEFT (AS ON R.H. CORNER.) (SHORT BOTTOM LINKS) | (ORIGINAL STEERING GEOMETRY) TABLE DATA SECTION 1: WHEELS ON FULL R.H. LOCK (Columns correspond to Applied Torque LBS. FT.: 1740, 1160, 580, 0) - FRAME ANGLE: 3°, 2 1/2°, 1 1/4°, 1/2° - LEAN OF WHEELS O.S.: 1.77" IN, 1.18" IN, .29" IN, .29" OUT - LEAN OF WHEELS N.S.: 2.07" OUT, 1.48" OUT, .74" OUT, .22" OUT - TRANSVERSAL LEAN O.S.: 4.5°, 4.5°, 3.9°, 3.8° - TRANSVERSAL LEAN N.S.: f, f, f, f - TOE IN: 1.160, .810, 0, 0 - ANGULAR MOVEMENT OF STEERING WHEEL: 29.5° DEC., 23.4° DEC., 15.4° DEC., 0 - VARIATION IN DIRECTION OF FRONT WHEELS O.S.: NOT MEASURABLE - VARIATION IN DIRECTION OF FRONT WHEELS N.S.: 1.66° INC. - CAST OR ANGLE O.S.: f, f, f, 1/2° - CAST OR ANGLE N.S.: f, f, f, 1/2° SECTION 2: WHEELS STRAIGHT (Columns correspond to Applied Torque LBS. FT.: 1740, 1160, 580, 0) - FRAME ANGLE: 3°, 2 1/3°, 1 1/4°, 1/2° - LEAN OF WHEELS O.S.: 3.7" IN, 2.66" IN, 1.68" IN, .15" IN - LEAN OF WHEELS N.S.: 2.56" OUT, 2.34" OUT, 1.48" OUT, .44" OUT - TRANSVERSAL LEAN O.S.: 3.5°, 3.3°, 3 1/4°, 3 1/2° - TRANSVERSAL LEAN N.S.: 3.5°, 3.3°, 3 1/4°, 3.5° - TOE IN: 1.160, .850, .650, .550 - ANGULAR MOVEMENT OF STEERING WHEEL: 11.5° DEC., 8.0° DEC., 4.2° DEC., 0 - VARIATION IN DIRECTION OF FRONT WHEELS O.S.: NOT MEASURABLE - VARIATION IN DIRECTION OF FRONT WHEELS N.S.: 1.29" INC. - CAST OR ANGLE O.S.: 1°, 1°, 1°, 1° - CAST OR ANGLE N.S.: 1/2°, 1/2°, 1/2°, 1/2° | ||