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).
Graph illustrating the endurance stress range for S/CV valve springs.
| Identifier | ExFiles\Box 126\4\ scan0152 | |
| Date | 6th June 1936 | |
| STRESS - LBS/SQ. IN. X 10^-3 RANGE FOR STATIC DEFLECTION ONLY RANGE WITH SURGE ELASTIC LIMIT A B ENDURANCE LIMIT LOWEST WORKING STRESS PH.2 E.851550 (77%) BENT STD E.8.175 (96%) 20/25 STD E.58523 (86%) EXP. BENT R.M.5.4.(77%) EXP. BENT R.M.57(73%) PH.II INNER E.87951 (105%) PH.II OUTER E.87952 (88%) STRESS - LBS/SQ. IN. X 10^-3 ENDURANCE STRESS RANGE FOR S/CV VALVE SPRINGS | ||