Blowback Calculations - Cannon DIGI-TROLL 5 Manuel De L'utilisateur

BLOWBACK CALCULATIONS

bLoWbACK
Simply stated, blowback is what happens to the downrigger weight when you pull it through the water behind your boat.
As your speed increases, so does the horizontal distance between the weight and your downrigger. The faster you go,
the farther the weight is behind you. The farther the weight is behind you, the shallower the weight is.
The following charts provide you with blowback information for three sizes of Cannon downrigger weights pulled at
three different speeds with no lures attached and with no current. Current drag, water salinity and the use of non-
Cannon products will affect your actual trolling depth.
As an example, the fi rst chart shows that if you are trolling at 4 MPH with an 8 pound weight and you have 100FT. of
cable in the water with no current; the down rigger ball is actually at a depth of about 80 FT.
8-Lb Weight at 2, 4, and 6 MPH
0
20
40
60
80
100
120
140
160
Cable Length (ft.)
©2016 Johnson Outdoors Marine Electronics, Inc.
6 MPH
4 MPH
2 MPH
12-Lb Weight at 2, 4, and 6 MPH
0
20
40
60
80
100
120
140
160
Cable Length (ft.)
10-Lb Weight at 2, 4, and 6 MPH
0
20
40
60
80
100
120
140
160
Cable Length (ft.)
6 MPH
4 MPH
2 MPH
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6 MPH
4 MPH
2 MPH