Graph and table detailing crankshaft torsion tests for Phantom and 20 HP models.
| Identifier | WestWitteringFiles\R\2December1927-February1928\ Scan035 | |
| Date | 7th December 1927 | |
| GRAPH 2. CRANKSHAFT TORSION TESTS. PHANTOM & 20 H.P. TABLE DATA: CURVE | CRANKSHAFT & CONDITIONS | STIFFNESS LBS.FT./RAD 2 | STD. PHANTOM. SEVEN BEARINGS. | 45,000 3 | STD. PHANTOM. BEARINGS. 1-4-7. | 42,100 5 | SPORTS PHANTOM. (E.76546) 7 BEARINGS | 38,820 6 | DITTO. BEARINGS. 1-4-7. | 30,600 1 | 20 H.P. STD. PARTLY MACHINED. OPERATION.15 | 53,000 4 | " Op. 19 | 41,400 7 | " Op. 21. | 27,200 8 | " Op. 22. | 25,600 9 | " Op. 31. | 22,800 10 | " Op. 33 A. {Mr Adams} | 17,400 11 | " ALSO STD. 20 H.P. 7 BEARINGS. Op. 39.A. | 16,400 12 | STD. 20 H.P. BEARINGS 1-4-7. | 15,400 13 | STD. 20 H.P. BEARINGS. 1-7. | 15,280 AXIS LABELS: Y-AXIS: LBS FT TORQUE ON NOSE. X-AXIS: DEGREES TWIST IN SHAFT. GRAPH LABELS: CURVE 1. CALCULATED FIG. FOR 6. CYL. SHAFT LIKE STUTZ. | ||
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).