EN
BTQ SERIES INSTALLATION AND USE MANUAL - IT EN - REV001A
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BTQ series5 - Installation
SINGLE PROPELLER
DOUBLE PROPELLER
• The force produced by the ow of the water when the boat is moving produces resistance on the rear face of the tunnel,
which is an area exposed frontally to the water ow.
To limit this phenomenon, prepare an indentation in the rear part of the tunnel. Otherwise, create a deector on the front
part of the tunnel.
• If the tunnel is near the waterline, it is advisable to t a grating at the end of the tube.
The grating must have as large a vertical mesh as possible to avoid contrasting the propeller
thrust. The vertical mesh prevents the entry of most of the oating objects.
• The rounded ends of the tunnel limit the creation of turbulences and cavitations, improving performance of the propeller
thrust and reducing noise levels to a minimum.
5.1 - The Tunnel
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