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 plotting power loss against engine RPM for a P.H. carburettor air silencer on a 20 EX standard car.
| Identifier | ExFiles\Box 6\7\ 07-page194 | |
| Date | 29th November 1931 | |
| P.H. CARBURETTOR AIR SILENCER POWER LOSS STANDARD CAR. - 20 EX B.H.P. (CORRECTED) AT ROAD WHEELS ENGINE R.P.M. CUT-OUT OPEN CUT-OUT CLOSED STANDARD CARB'R AIR SILENCER AIR SILENCER OFF COMPLETE ALL INNER TUBES OUT OF AIR SILENCER (SPEEDS 2000 R.P.M. UPWARDS IN 3RD GEAR) 29-11-31 | ||