THE ELIMINATION OF NOISE IN MOTOR-CYCLES.

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THE ELIMINATION OF NOISE IN MOTOR-CYCLES.

At the Birmingham Centre of the ‘Institution of Automobile Engineers, Mr. Harold Briggs delivered an extremely interesting paper on the above subject. In the course of his observations, the author outlined the different causes of noise and made suggestions as to their elimination. He said that the majority of sports models were noisy and constituted a nuisance when driven all out in towns at night. In his opinion, greater silence could be secured, with very little sacrifice of power, if greater attention were paid to exhaust valve timing. Mr. Briggs considered that manufacturers might find advantages by giving more attention to the question of silencing.

Those of our readers who have bought and paid for their experience in connection with noisy machines will probably agree with the views expressed above, and possibly car manufacturers too, will realise that sports car owners cannot be deceived by a ” barking ” exhaust if it only serves to suggest the ” bite ” of engine efficiency.

MR. REGIN.A.LD STRAKER, who is well known in the competition world, has recently started business on his own account and specialises in tuning up cars for races and trials. The car illustrated is his own Riley which he has improved in various

ways and is introducing as a special sports model.