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).
Polar plot diagram illustrating the load on a centre main bearing, comparing balanced and unbalanced forces.
| Identifier | ExFiles\Box 115\2\ scan0390 | |
| Date | 17th June 1941 guessed | |
| LOAD ON CENTRE MAIN BEARING 2850 RPM - 206 MEP UNBALANCED BALANCED SCALE 1"=2000 LBS. No. 1 4000 8000 10,000 11,000 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | ||