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).
Design drawing and calculation sheet for a 25 HP silencer tuning chamber.
| Identifier | ExFiles\Box 104\2\ scan0019 | |
| Date | 2nd June 1932 guessed | |
| TUNING CHAMBER 25 H.P SILENCER CHAMBER Y Vol Chamber & Cu Ins Length Response Frequency A 180 10" 83/sec B 180 7" 85/sec C 108 105/sec CHAMBER X Vol 150 cu ins Length 8" Frequency 1/c 150 Frequency 130 160 180 Diagram labels/dimensions: A, B, C, X, Y, Z, 1.250, 2", 3.25", 2.4" Ψ CONDUCTIVITY 2" of 1.250 O.D. pipe on 1.23 D" C = π R² / (L + N/2 R) To alter Z to 2" conductivity change to 4" of .5" inside dia pipe | ||