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 plotting tyre self-centring torque and slip angle against total sideways load for various tyre types and conditions.
| Identifier | ExFiles\Box 158\1\ scan0221 | |
| Date | 12th October 1938 guessed | |
| TYRE SELF CENTRING TORQUE & SLIP ANGLE CHASSIS 3 B IV FRONT WHEELS ON 4 FT. DIA: DRUMS ALL TYRES 6.50 X 17 X 25 LBS/SQ" CASTOR ANGLE = 3.5° WHEEL CENTRE VERTICALLY ABOVE DRUM CENTRE TOTAL SELF CENTERING TORQUE - LBS./FT. TOTAL SIDEWAYS LOAD - LBS. SLIP ANGLE - DEGREES CURVE LABELS (SELF CENTERING TORQUE - UPPER CURVES): 100% WORN INDIA 85% WORN DUNLOP 80% WORN INDIA NEW BRITISH GOODRICH CURLY TREAD BRITISH GOODRICH STRAIGHT TREAD (1000 MILES) NEW DUNLOP NEW INDIA CURVE LABELS (SLIP ANGLE - LOWER CURVES): NEW INDIA, DUNLOP & BRITISH GOODRICH (BOTH TREADS) 80% WORN INDIA 85% WORN DUNLOP 100% WORN INDIA | ||