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).
Modifications to the Phantom II air inlet silencer to reduce power loss.
| Identifier | ExFiles\Box 13\3\ 03-page192 | |
| Date | 28th January 1930 | |
| BY.{R.W. Bailey - Chief Engineer} FROM E.{Mr Elliott - Chief Engineer} .17080 E2/M28.1.30. Copy to SG.{Arthur F. Sidgreaves - MD} Copy to HS.{Lord Ernest Hives - Chair} PHANTOM 2. AIR INLET SILENCER. We send you herewith a blueprint of LeC.2786. shewing the above modified to reduce the power lost which occurred with the original design. We have reinstated the standard diameter of suction chamber, air valve, and high speed choke. The air supply passage to the air valve has also been enlarged at the expanse of some height added to the jet control and the suction chamber, but this has been kept down to a minimum particularly to enable us to with- draw these parts without fouling the induction pipe. The completed drawing will follow shewing details of the breather attachment to crankcase. E.{Mr Elliott - Chief Engineer} | ||