Trim tab and variable exhaust system, especially for motor boats and motor yachts

摘要

A box-like trim tab (1) for a high-speed motor boat or motor yacht (9) has an inlet (21) at its side pivotally connected with the stern (10) of the boat (9) so that it can allow the exhaust gas or a cooling liquid (18) of the engine (13) to pass through the trim tab (1) and emerge at the open free side (22) thereof. The trim tab (1) reduces the noise generated by discharging the exhaust gas under the water or by conducting the exhaust (18) gas through the water to the trim tab outlet (22).