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).
Log of reports and modifications related to valve springs.
| Identifier | ExFiles\Box 80\3\ scan0238 | |
| Date | 7th March 1912 | |
| R.R. 512 (2 H) X. 488. 2.1.12.) G 2273. Section 604 Description: Valve springs. Date: 7/3/12 REPORT: Sheet from Mr Royce received 13-3-12. See folder T D office. to deal with broken valve springs as follows. 1. Increase dia. of convolutions of springs 2. Increase dia of convolutions of springs at top only. REPORT: 3. Reduce lift of Exhaust valve. Date: 15/3/12 REPORT: Sheet from D.O. sec 3 18/3/10. Instructing washers. Abeyance "V" Nail's material. Date: 21/3/12 REPORT: Springs tested BCT Vickers steel 5 broken. Date: 15/5/12 Date: 25.7.12 Miles: 10.000 REPORT: miles run. One broken 2 more sets fitted. Date: 26.7.12 Miles: 1 REPORT: Broken (Exhaust) Piece ex 'C'916 after 900 miles. | ||