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).
Blueprint detailing the specifications for a low pressure valve spring.
| Identifier | ExFiles\Box 96\2\ scan0238 | |
| Date | 27th June 1924 | |
| RM.{William Robotham - Chief Engineer}385 1.850 FREE LENGTH .495 DIA OUTSIDE THIS END COIL GROUND SQUARE .312 DIA END COIL .125 R .300 R DIA OF WIRE .028" (22 SWG) NO OF WORKING COILS 18.5 TOTAL NO OF COILS 20.0 LOAD WHEN COMPRESSED TO .850" = .5 lbs SPRING. LOW PRESSURE VALVE. PH III. TO BE USED IN CONJUNCTION WITH LEC 599R RELIEF VALVE D.C.R. LEE 27/6/24 | ||