Data table for a 12-cylinder engine, analyzing properties at 30° and 45° angles.
| Identifier | ExFiles\Box 179\2\ img218 | |
| Date | 9th February 1932 guessed | |
| Header Information: 12 CYL Z = 2 B = p(2T - d) Table Data: Column Headers: ORDER Under 30° section: Col 1: * Col 2: B/W e Col 3: N Col 4: * B/W e Under 45° section: Col 5: N Col 6: * B/W e Row Data (ORDER, Col 1, Col 2, Col 3, Col 4, Col 5, Col 6): 1 1/2: 1.255, 135, -.77, -.97, 1.111, 1.40 2: -.16, 300, 1.732, .28, 1.414, .23 2 1/2: -.682, 105, 1.22, .83, 1.663, 1.13 3: 4.33, 270, 1.42, 6.15, -.765, 3.31 3 1/2: -.682, 75, 1.58, 1.07, 1.961, 1.34 4: -.16, 240, 1, -.16, 0, 0 4 1/2: 1.255, 45, 1.77, 2.22, 1.961, 2.46 5: -.16, 210, -.52, .08, -.765, -.12 5 1/2: -.652, 15, 2, 1.36, 1.663, 1.13 6: 4.33, 180, 0, 0, 1.414, 6.12 6 1/2: -.68, 345, 2, 1.36, 1.111, -.76 7: -.16, 150, -.52, -.08, 1.948, .30 7 1/2: 1.255, 315, 1.77, 2.22, -.39, -.49 8: -.16, 120, 1, -.16, 2.0, -.32 8 1/2: -.682, 285, 1.58, 1.07, -.39, -.27 9: 4.33, 90, 1.42, 6.15, 1.848, 8.00 9 1/2: -.682, 250, 1.22, -.83, 1.111, -.76 10: -.16, 60, 1.732, -.28, 1.414, .23 10 1/2: 1.255, 220, -.77, -.97, 1.663, 2.08 11: -.16, 30, 1.92, -.29, -.765, -.12 11 1/2: -.682, 190, .26, -.17, 1.961, 1.34 12: 4.33, 0, 2, 8.66, 0, 0 | ||
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).