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 comparing the deflection of different Phantom III clutch driven plates under various pressure plate loads.
| Identifier | ExFiles\Box 93\3\ scan0332 | |
| Date | 2nd July 1932 | |
| P III CLUTCH. DRIVEN PLATES. 13.500 DIAR. AXIS LABELS: Y-AXIS: DEFLECTION - INS. X-AXIS: PRESSURE PLATE LOAD - LBS. CURVES: EX. 27309 B+B TEST (HYCO) EX. 27309 R.R. TEST (VM.20) AMERICAN LONG B+B TEST (THERMOID) R.R. STD PLATE R.R. TEST G84810 OTHER TEXT: 1900 J W Macfarlane 2-7-32 | ||