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).
Proposal to use Duralumin instead of porous phosphor bronze for servo gear worm wheels in 40/50 & 20 HP models.
| Identifier | ExFiles\Box 67\1\ scan0008 | |
| Date | 1st October 1925 | |
| X8370 HS.{Lord Ernest Hives - Chair} RHC.{R. H. Coverley - Production Engineer} BY9/H.{Arthur M. Hanbury - Head Complaints} 1. 10. 25. SERVO GEARS. 40/50 & 20 HP. We have an enormous amount of trouble owing to the phosphor bronze worm wheel being porous. I estimate 50% of the turned parts are scrapped prior to cutting the teeth, simply due to porosity. I am of the opinion that Duralumin will make a good worm wheel. I have evidence that rather goes to prove this, and therefore I suggest that the Experimental Dept. make a number of worm wheels in Duralumin. The necessary bar, heat-treated can be obtained from The Duralumin Company. BY.{R.W. Bailey - Chief Engineer} Rcy | ||