A REVOLUTION IN SILENCER DESIGN!

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A REVOLUTION IN SILENCER DESIGN/

THE BURGESS STRAIGHT THROUGH SILENCER APPLIES ENTIRELY NEW PRINCIPLES TO THE SILENCING OF AUTOMOBILE EXHAUSTS . . .

HITHERTO ENGINEERS HAVE CONCENTRATED on muffling exhaust noise by the restriction of out-flowing gases. This restriction sets up back-pressure.

THE POWER LOSS FROM BACK-PRESSURE in some exhaust systems after a short period of use is very high. Over-heating, poor acceleration and HEAVY PETROL CONSUMPTION result.

The BURGESS STRAIGHT THROUGH system reduces the intensity of sound waves by absorption. The illustration above clearly shows the straight-through central perforated pipe, free of baffle-plates or other restrictive elements, but surrounded by a heat resisting acoustic filling which permits the expansion of gas and absorbs the sound waves.

The BURGESS SILENCING SYSTEM as fitted to the ALVIS range combines freedom from back-pressure with efficient silencing. A DESCRIPTIVE LEAFLET giving full particulars of this interesting invention may be had from any good service garage, or post free from : (Patent No. 312937) British Manufacture DEPARTMENT S3 BURGESS PRODUCTS CO., Bush House, London, VV.C.2

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