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).
List of technical points regarding shutter design, mounting, and materials.
| Identifier | ExFiles\Box 150\3\ scan0116 | |
| Date | 6th January 1937 | |
| -2- (6) Shutter pivot pins to have screw adjustment in bearing strips as mentioned in HPS. {Horace Percy Smith - Experimental Factory Mgr} 3/EP. {G. Eric Platford - Chief Quality Engineer} 11.12.36. - see drawing EX.194 attached. (7) Shutter supported off shell, suitably stiffened, or off matrix unit, compensating for expansion by means of vertical end play and spring loading - this should be preferable to supporting them off the yoke, which must flex considerably under working conditions. (8) Wider and more resilient bearing strip to be used - suggest .750 wide and .100 thick. We will forward sample of suitable fabric - see Rm {William Robotham - Chief Engineer} /Std3/AP.11.12.36. (9) The question of recessing the shutters into the shell sufficiently to enable them all to be made the same length enclosed within shell, should be worth in-vestigation from an appearance standpoint. Rm {William Robotham - Chief Engineer} /Std. | ||