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).
Resonance air silencer tests for carburettor roar on a Phantom II semi-expanding carburettor.
| Identifier | ExFiles\Box 13\3\ 03-page427 | |
| Date | 15th June 1932 | |
| Files. 87080. 15.6.32 CARBURETTER ROAR. P.II. SEMI EXPANDING CARB. RESONANCE AIR SILENCER TESTS. Inside dia. of tuning pipe 2.750" For 40 m.p.h. roar, length of pipe 4" For 60 m.p.h. roar, pipe lengths of 5½", 13½", and 25½" are effective, the best being 13½". This distance is also given more accurately than the others. These tests were carried out on 22-EX on the road with a standard P.II silencing system, 114º Camshaft E.82448. | ||