Performance graph of Horsepower vs R.P.M. comparing a standard silencer with an experimental silencer.
| Identifier | ExFiles\Box 102\1\ scan0115 | |
| Date | 15th March 1933 | |
| HP R.P.M. CURVE TAKEN WITH EXPL. CARB. SILENCER ON TANK ENGINE WITH FAN. POWER VERY SLIGHTLY BETTER THAN WITH STANDARD AIR MAZE SILENCER. 15. 3. 33 UNIT BED W N 1800 STANDARD SILENCER. EXPL. SILENCER. | ||
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).