Blueprint for a main pressure valve spring for use with a relief valve.
| Identifier | ExFiles\Box 96\2\ scan0237 | |
| Date | 27th May 1931 | |
| SPRING, MAIN PRESSURE VALVE PHANTOM. TO BE USED IN CONJUNCTION WITH LEC 5448 RELIEF VALVE. R.M.384. 2.50 FREE LENGTH. .525 DIA OUTSIDE. THIS END COIL. GROUND SQUARE. .312 DIA END COIL. .300 R. {Sir Henry Royce} .125 R. {Sir Henry Royce} DIA OF WIRE .040" (19SWG). No OF WORKING COILS 13.5. TOTAL No OF COILS 15.0. LOAD WHEN COMPRESSED TO 1.0" = 3-5 lbs. D.C.R. LEE. 27/5/31. | ||
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).