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).
Diagram illustrating friction and spring in plates related to a hub flange.
| Identifier | ExFiles\Box 130\3\ scan0168 | |
| Date | 31th January 1941 | |
| FRICTION REPRESENTING HUB FLANGE REPRESENTING SPRING IN PLATES LIMIT ON THIS DIM. FOR GIVEN FRICTION IS NOT CLOSE LIMIT ON THIS DIM FOR GIVEN FRICTION IS VERY CLOSE THIS REPRESENTS CONDITION WHEN HUB FLANGE IS NIPPED CLOSE TO SPACERS Rm{William Robotham - Chief Engineer}/GB 31/1/41 | ||