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 of a 25 HP double flywheel bearing.
| Identifier | Morton\M13.2\ img042 | |
| Date | 20th April 1931 guessed | |
| SPIGOTTED TO FLYWHEEL HOUSING 25 HP DOUBLE FLYWHEEL BEARING Ex 5810 2.675 2.800 1.156 | ||