Blueprint detailing the location and part numbers of valve springs for the 20/25 HP and 40/50 HP chassis.
| Identifier | ExFiles\Box 56\2\ Scan105 | |
| Date | 27th September 1930 | |
| [ "FILE UNDER VALVE SPRINGS", "20/25 HP Chassis", "Location of Valve Springs", "40/50 HP Chassis", "Left Diagram (20/25 HP Chassis):", "Part Numbers: E51088, E55672, E56051", "Dimensions: .975 +10, .950 -10, .075, .070, .105, 1.075 -5, 1.100 +10", "Right Diagram (40/50 HP Chassis):", "Part Numbers: E70315, E80240, E80300", "Dimensions: 1.120 +10, 1.100 -10, .110, .105, .070, 1.110 -5, 1.120, 1.1075", "Notes:", "All washers have .025" Rad.", "add for 7oz bolt & nut", "semi finished", "Stamp:", "ROLLS-ROYCE, LIMITED", "PRINT ROOM", "27 SEP 1930", "DERBY" ], | ||
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).