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).
Difference between Quickstep and High Silicon Valve steel from Firths'.
| Identifier | ExFiles\Box 48\4\ Scan135 | |
| Date | 17th July 1924 | |
| - 2 - BY17/H.{Arthur M. Hanbury - Head Complaints} 17. 7. 24. ---------- Incidentally, it means that having now conceived an intelligent reason for the difference between the Quickstep and the High Silicon Valve, my nervousness in regard to the use of Firths' type of this steel has practically disappeared, as the value of the steel is in its high recalescence point, and not so much in the heat-treatment, although we have proved that the heat-treatment can make or mar the running of the valve within certain limits. BY.{R.W. Bailey - Chief Engineer} By | ||