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).
Drawing and calculation for a balance weight for LEC 2925.
| Identifier | ExFiles\Box 137\4\ scan0372 | |
| Date | 11th August 1931 guessed | |
| 1/4" THICK 15.0" 4.6 lbs Moment 11.5 lbs-ins INERTIA = M/2 (a² + x²) r a 2.3 (3.5 + 16) = 45 lbs-in² BALANCE WEIGHT FOR LEC 2925 | ||