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 sheet comparing steering specifications for various chassis models.
| Identifier | ExFiles\Box 154a\2\ scan0370 | |
| Date | 4th March 1937 | |
| STEERING DATA. CHASSIS, STANDARD Ph. III, WRAITH MOUNT Ph. III, WRAITH II, BEN II, 25/30. TURNS OF WHEEL - LOCK TO LOCK, 3.25, 3.25, 2.90, 2.10, 2.80. LOCK ANGLE OF INNER ROAD WHEEL, 41°, 41°, 41°, 40°, 36°. OVERALL RATIO. STG. WHEEL/ROAD WHEEL, 16.3, 16.3, 14.5, 10.9, 15.2. RATIO OF BOX. MID. POSITION., 15.3, 17.5, 13.4, 12.5, 17.5. PARKING EFFICIENCY OF BOX., 80%, 80%, 85%, 60%, 80%. TYRE SIZE., 7.00 x 18, 7.00 x 18, 7.00 x 17, 5.50 x 18, 6.00 x 19. OUT OF CENTRE POINT., 2.120, 2.120, 2.110, 1.650, 0.795. CASTOR ANGLE. NORMAL POSN., 1° 0', 1° 0', 1° 0' or 1° 30', 4° 30', 3° 30'. CASTOR ANGLE. FULL BUMP., -1° 30', +0° 30', +0° 13' or +0° 43', —, —. TRANSVERSE LEAN OF PIVOT., 2° 30', 2° 30', 3° 30', 1° 0', 4° 15'. WHEEL CAMBER. NORMAL POSN., +1° 0', +1° 0', +1° 0', +1° 0', 2° 30'. WHEEL CAMBER. FULL BUMP., -4° 5', -0° 7', -0° 53', —, —. WHEEL CAMBER. FULL REBOUND., +3° 52', -2° 0', -1° 35', —, —. BUMP MOVEMENT., 3.680, 3.125, 3.080, 1.600, 2.250. REBOUND MOVEMENT., 4.340, 4.025, 4.900, —, —. ROLLS-ROYCE, LTD. PRINT ROOM, 4 MAR 1937 DERBY N.A./3/3/37 | ||