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).
Note explaining the methodology for calculating the total weight of the B.60 engine.
| Identifier | ExFiles\Box 124\1\ scan0013 | |
| Date | 25th October 1939 | |
| To Rm.{William Robotham - Chief Engineer} In calculating the total weight of the B.60 engine, individual items such as fan, manifold, & clutch case, were added onto the weight of the engine that was photographed, as they became available. Cr.{Mr Cra???ster / Mr Chichester} 25.x.39. | ||