Quick BTAC Series Installation And User Manual page 8

4 - Installazione
EN
4.0 - Eliche
FIG. 1
Minimum 0.75
times tunnel Ø
FIG. 2
BARYCENTRE
FIG.3
A
MINIMO 1,5 VOLTE IL Ø TUNNEL
MASSIMO 6 VOLTE IL Ø TUNNEL
8
A B
L1
L2
QUICK BTAC SERIES INSTALLATION AND USER'S MANUAL - REV002A
The position of the tunnel will depend on the interior
and exterior shape of the boat's bow.
• FIG. 1 In order to avoid cavitation in the propeller, the
tunnel should be placed as deep as possible. The optimum
tunnel position will be at least 0.75 times the diameter of
the tunnel from the waterline.
• FIG. 2 The lever effect in the boat is proportional to
the increase of the distance (L1 and L2) between the
barycentre and the position of the tunnel A and B.
• FIG. 3 For greater lever effect prefer position B.
B
An increase in the length of the tunnel increases the
effect of the loss of charge, decreasing the nominal
driving force.
• FIG.4 For a proper use of the thruster, we recommend
a length equal to 1.5 to 4 times the tunnel diameter. To
limit losing charge, a ratio of up to 6 times the diameter
can be tolerated.
BTAC Series