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Home > Anchor & Docking > Bow & Stern Thruster > Vetus Bow & Stern Thruster >

Vetus Electric Thruster




A bow thruster delivers a side directional thrust force. In order to ensure the best performance under all sorts of weather and water conditions, the bow thruster should be able to provide a thrust force which is suitable, or rather: sufficient, for the boat in which it has been installed. The applied moment of the thrust force - which means to say: the position of the tunnel in the bow - is of prime importance for the bow thruster's efficiency. The further forward the bow thruster is positioned, the greater will be the efficiency.

Call Vetus Tech Support at 410 712 0740







VETUS Bow Thruster Package 2512E 55 Lb, 1.5Kw, 2 HP, 12V with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 3512E 77 Lb, 1.5Kw, 2 HP, 12V with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 2512E 55 Lb, 1.5Kw, 2 HP, 12V with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 3,378.70
Our Price: $US 2,399.00

VETUS Bow Thruster Package 3512E 77 Lb, 1.5Kw, 2 HP, 12V with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,236.70
Our Price: $US 2,799.00

VETUS Bow Thruster Package 4512D 99 Lb, 4 HP, 12V with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 5512D 121 Lb, 3Kw, 4HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 4512D 99 Lb, 4 HP, 12V with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 5,198.70
Our Price: $US 2,649.00

VETUS Bow Thruster Package 5512D 121 Lb, 3Kw, 4HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,795.70
Our Price: $US 2,799.00

VETUS Bow Thruster Package 6012D 132 Lb, 3Kw, 4HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 7512D 165 Lb, 4.4Kw, 6HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 6012D 132 Lb, 3Kw, 4HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,678.70
Our Price: $US 2,949.00

VETUS Bow Thruster Package 7512D 165 Lb, 4.4Kw, 6HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 6,498.70
Our Price: $US 3,349.00

VETUS Bow Thruster Package 9512D 210 Lb, 5.3Kw, 7.5HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 12512D 276 Lb, 5.3Kw, 7.5HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 9512D 210 Lb, 5.3Kw, 7.5HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 6,693.70
Our Price: $US 4,349.00

VETUS Bow Thruster Package 12512D 276 Lb, 5.3Kw, 7.5HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 7,798.70
Our Price: $US 5,499.00

VETUS Bow Thruster Package 16024D 352 Lb, 24V, 7Kw, 9.5HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 22024D 488 Lb, 24V, 11Kw, 15HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Bow Thruster Package 16024D 352 Lb, 24V, 7Kw, 9.5HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 9,865.70
Our Price: $US 7,449.00

VETUS Bow Thruster Package 22024D 488 Lb, 24V, 11Kw, 15HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 14,163.50
Our Price: $US 9,499.00

VETUS Bow Thruster Package 28548D 627 Lb, 48V, 16Kw, 21.5HP with Fiberglass Tunnel, Control, Cable, Fuse
VETUS Stern Thruster Package 12512D 276 Lb, 5.3Kw, 7.5HP with Stern Kit, Control, Cable, Fuse
VETUS Bow Thruster Package 28548D 627 Lb, 48V, 16Kw, 21.5HP with Fiberglass Tunnel, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 17,665.70
Our Price: $US 11,699.00

VETUS Stern Thruster Package 12512D 276 Lb, 5.3Kw, 7.5HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 7,558.80
Our Price: $US 5,799.00

VETUS Stern Thruster Package 16024D 352 Lb, 24V, 7Kw, 9.5HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 2512E 55 Lb, 1.5Kw, 2 HP, 12V with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 16024D 352 Lb, 24V, 7Kw, 9.5HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 9,106.80
Our Price: $US 7,699.00

VETUS Stern Thruster Package 2512E 55 Lb, 1.5Kw, 2 HP, 12V with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 3,118.80
Our Price: $US 2,689.00

VETUS Stern Thruster Package 3512E 77 Lb, 1.5Kw, 2 HP, 12V with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 4512D 99 Lb, 4 HP, 12V with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 3512E 77 Lb, 1.5Kw, 2 HP, 12V with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 3,910.80
Our Price: $US 2,949.00

VETUS Stern Thruster Package 4512D 99 Lb, 4 HP, 12V with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,678.80
Our Price: $US 2,899.00

VETUS Stern Thruster Package 5512D 121 Lb, 3Kw, 4HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 6012D 132 Lb, 3Kw, 4HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 5512D 121 Lb, 3Kw, 4HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,426.80
Our Price: $US 2,999.00

VETUS Stern Thruster Package 6012D 132 Lb, 3Kw, 4HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,318.80
Our Price: $US 3,099.00

VETUS Stern Thruster Package 7512D 165 Lb, 4.4Kw, 6HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 9512D 210 Lb, 5.3Kw, 7.5HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 7512D 165 Lb, 4.4Kw, 6HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 4,798.80
Our Price: $US 3,589.00

VETUS Stern Thruster Package 9512D 210 Lb, 5.3Kw, 7.5HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 8,146.80
Our Price: $US 4,599.00

VETUS Stern Thruster Package 22024D 488 Lb, 24V, 11Kw, 15HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 28548D 627 Lb, 48V, 16Kw, 21.5HP with Stern Kit, Control, Cable, Fuse
VETUS Stern Thruster Package 22024D 488 Lb, 24V, 11Kw, 15HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 13,074.00
Our Price: $US 9,749.00

VETUS Stern Thruster Package 28548D 627 Lb, 48V, 16Kw, 21.5HP with Stern Kit, Control, Cable, Fuse

Brand New with Factory Warranty

List Price: $US 16,306.80
Our Price: $US 11,899.00

VETUS Bow Thruster 55 Lb, 1.5Kw, 2 HP, 12V, BOW2512E
VETUS Bow Thruster 77 Lb, 12V, 1.5Kw, 2 HP, BOW3512E
VETUS Bow Thruster 55 Lb, 1.5Kw, 2 HP, 12V, BOW2512E

Brand New with Factory Warranty

List Price: $US 2,294.00
Our Price: $US 1,776.00

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VETUS Bow Thruster 77 Lb, 12V, 1.5Kw, 2 HP, BOW3512E

Brand New with Factory Warranty

List Price: $US 2,512.00
Our Price: $US 1,960.00

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VETUS Bow Thruster 121 Lb, 3Kw, 4HP, BOW5512D
VETUS Bow Thruster 132 Lb, 3Kw, 4HP, BOW6012D
VETUS Bow Thruster 121 Lb, 3Kw, 4HP, BOW5512D

Brand New with Factory Warranty

List Price: $US 3,031.00
Our Price: $US 2,345.00

Click "Add to Cart" Button To See Our Price! Why?
VETUS Bow Thruster 132 Lb, 3Kw, 4HP, BOW6012D

Brand New with Factory Warranty

List Price: $US 3,113.00
Our Price: $US 2,461.00

Click "Add to Cart" Button To See Our Price! Why?
VETUS Bow Thruster 165 Lb, 4.4Kw, 6HP, BOW7512D
VETUS Bow Thruster 210 Lb, 5.3Kw, 7.5HP, BOW9512D
VETUS Bow Thruster 165 Lb, 4.4Kw, 6HP, BOW7512D

Brand New with Factory Warranty

List Price: $US 3,588.00
Our Price: $US 2,795.00

Click "Add to Cart" Button To See Our Price! Why?
VETUS Bow Thruster 210 Lb, 5.3Kw, 7.5HP, BOW9512D

Brand New with Factory Warranty

List Price: $US 5,134.00
Our Price: $US 4,013.00

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VETUS Bow Thruster 276 Lb, 5.3Kw, 7.5HP, BOW12512D
VETUS Bow Thruster 352 Lb, 24V, 7Kw, 9.5HP, BOW16024D
VETUS Bow Thruster 276 Lb, 5.3Kw, 7.5HP, BOW12512D

Brand New with Factory Warranty

List Price: $US 6,035.00
Our Price: $US 4,721.00

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VETUS Bow Thruster 352 Lb, 24V, 7Kw, 9.5HP, BOW16024D

Brand New with Factory Warranty

List Price: $US 7,674.00
Our Price: $US 5,981.00

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VETUS Bow Thruster 488 Lb, 24V, 11Kw, 15HP, BOW22024D
VETUS Bow Thruster 627 Lb, 48V, 16Kw, 21.5HP, BOW28548D
VETUS Bow Thruster 488 Lb, 24V, 11Kw, 15HP, BOW22024D

Brand New with Factory Warranty

List Price: $US 10,214.00
Our Price: $US 7,908.00

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VETUS Bow Thruster 627 Lb, 48V, 16Kw, 21.5HP, BOW28548D

Brand New with Factory Warranty

List Price: $US 13,163.00
Our Price: $US 10,190.00

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VETUS Bow Thruster, 99 lb, 4 HP, 12V BOW4512D
VETUS BOW PRO 651 Bow Thruster 143 Lb - 12V, BOWA0651
VETUS Bow Thruster, 99 lb, 4 HP, 12V BOW4512D

Brand New with Factory Warranty

List Price: $US 2,731.00
Our Price: $US 2,114.00

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VETUS BOW PRO 651 Bow Thruster 143 Lb - 12V, BOWA0651

Brand New with Factory Warranty

List Price: $US 4,514.00
Our Price: $US 4,150.00

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VETUS BOW PRO 301 Bow Thruster 66 Lb - 12V, BOWA0301
VETUS BOW PRO 361 Bow Thruster 80 Lb - 12V, BOWA0361
VETUS BOW PRO 301 Bow Thruster 66 Lb - 12V, BOWA0301

Brand New with Factory Warranty

List Price: $US 3,229.00
Our Price: $US 2,939.00

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VETUS BOW PRO 361 Bow Thruster 80 Lb - 12V, BOWA0361

Brand New with Factory Warranty

List Price: $US 3,599.00
Our Price: $US 3,280.00

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VETUS BOW PRO 421 Bow Thruster 93 Lb - 12V, BOWA0421
VETUS BOW PRO 571 Bow Thruster 125 Lb - 12V, BOWA0571
VETUS BOW PRO 421 Bow Thruster 93 Lb - 12V, BOWA0421

Brand New with Factory Warranty

List Price: $US 3,712.00
Our Price: $US 3,575.00

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VETUS BOW PRO 571 Bow Thruster 125 Lb - 12V, BOWA0571

Brand New with Factory Warranty

List Price: $US 4,583.00
Our Price: $US 4,163.00

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VETUS BOW PRO 761 Bow Thruster 167 Lb - 12V, BOWA0761
VETUS Bow Thruster Package BOW PRO 651 Bow Thruster 143 Lb - 12V with Fiberglass Tunnel, Control, Cables
VETUS BOW PRO 761 Bow Thruster 167 Lb - 12V, BOWA0761

Brand New with Factory Warranty

List Price: $US 5,055.00
Our Price: $US 4,617.00

Click "Add to Cart" Button To See Our Price! Why?
VETUS Bow Thruster Package BOW PRO 651 Bow Thruster 143 Lb - 12V with Fiberglass Tunnel, Control, Cables

Brand New with Factory Warranty

List Price: $US 5,099.00
Our Price: $US 4,599.00

VETUS Bow Thruster Package BOW PRO 301 Bow Thruster 66 Lb - 12V with Fiberglass Tunnel, Control, Cables
VETUS Bow Thruster Package BOW PRO 361 Bow Thruster 80 Lb - 12V with Fiberglass Tunnel, Control, Cables
VETUS Bow Thruster Package BOW PRO 301 Bow Thruster 66 Lb - 12V with Fiberglass Tunnel, Control, Cables

Brand New with Factory Warranty

List Price: $US 3,899.00
Our Price: $US 3,399.00

VETUS Bow Thruster Package BOW PRO 361 Bow Thruster 80 Lb - 12V with Fiberglass Tunnel, Control, Cables

Brand New with Factory Warranty

List Price: $US 4,199.00
Our Price: $US 3,699.00

VETUS Bow Thruster Package BOW PRO 421 Bow Thruster 93 Lb - 12V with Fiberglass Tunnel, Control, Cables
VETUS Bow Thruster Package BOW PRO 571 Bow Thruster 125 Lb - 24V with Fiberglass Tunnel, Control, Cables
VETUS Bow Thruster Package BOW PRO 421 Bow Thruster 93 Lb - 12V with Fiberglass Tunnel, Control, Cables

Brand New with Factory Warranty

List Price: $US 4,500.00
Our Price: $US 3,799.00

VETUS Bow Thruster Package BOW PRO 571 Bow Thruster 125 Lb - 24V with Fiberglass Tunnel, Control, Cables

Brand New with Factory Warranty

List Price: $US 5,789.00
Our Price: $US 4,499.00

VETUS Bow Thruster Package BOW PRO 761 Bow Thruster 167 Lb - 24V with Fiberglass Tunnel, Control, Cables
VETUS Bow Thruster Package BOW PRO 761 Bow Thruster 167 Lb - 24V with Fiberglass Tunnel, Control, Cables

Brand New with Factory Warranty

List Price: $US 5,289.00
Our Price: $US 4,799.00


Selecting the correct Bow Thruster

A bow thruster delivers a side directional thrust force. In order to ensure the best performance under all sorts of weather and water conditions, the bow thruster should be able to provide a thrust force which is suitable, or rather: sufficient, for the boat in which it has been installed. The applied moment of the thrust force - which means to say: the position of the tunnel in the bow - is of prime importance for the bow thruster's efficiency. The further forward the bow thruster is positioned, the greater will be the efficiency.

 
The force applied by the wind onto the boat is determined by the factors: wind speed, angle of wind attack and lateral wind draft area of the boat.
  • The Wind Pressure
    When the wind speed increases, the wind pressure increases quadraticallly!
    For wind pressure 'P', the formula reads: P = 1/2p × V² (l bf/sq.ft)
    p (rho) represents the specific mass of air and 'V' stands for the
    velocity of the air in ft/s.
    The table below will give you an impression of wind speeds and the resulting wind pressures. It will not be possible to counter completely the adverse effect of winds of 40 knots or more. But, in such cases, the bow thruster will still "lend a strong helping hand".
     
  • The Wind-Draft of the Boat
     The forces applied by the wind onto the boat can be determined by multiplying the wind pressure by the wind draft area. The wind draft area is determined by the shape and the dimensions of the superstructure. Also the wind angle is playing its part. The worst situation is created if the wind is at 90 degrees to the boat. However, due to the shape of the superstructure, which is mostly more or less streamlined, a reduction factor may be applied to the wind draft area, before calculating the wind pressure resulting from the wind speed. This reduction factor may generally be set at 0.75.
     
  • The Torque
    The torque is determined by multiplying the wind force by the distance (A) between the center of effort* of the wind and the center of rotation** of the boat. Assuming that the wind force is amidships and assuming as well that the boat will tend to turn at the transom, the torque, caused by the wind force, is calculated by multiplying the wind force by half of the boat's length.
     
    * - Dependent upon the shape of the boat's superstructure, the center of effort may be positioned more forward or more aft.
    ** - The center of rotation of the boat may be positioned more forward, dependent upon the shape of the underwater section.
     
  • The Thrust Force
     The bow thruster is required to apply a countering thrust force, which is at least equal to the thrust force applied by the wind. The required thrust force of the bow thruster may now be calculated by dividing the torque by the distance between the center of the bow thruster and the pivot point of the boat.

Wind Speed - Wind Pressure Chart

Wind Speed
knots
Description Wind Speed
ft/s
Wind pressure lbf/sq.ft.
10 - 16
16 - 22
22 - 28
28 - 34
34 - 40
moderate breeze
fresh breeze
strong breeze
near breeze
gale
17 - 27
27 - 37
37 - 47
47 - 57
57 - 67
0.40 - 1
1 - 1.9
1.9 - 3.1
3.1 - 4.6
4.6 - 6.3

Calculation example

The boat has an overall length of 36 ft and the lateral wind draft measures 190 sq.ft. It is required that the bow can still be controlled easily when a wind force of 20 knots applies. At a wind force of 20 knots, the wind pressure is:

p = 1.0 to 1.9 lbf/sq.ft i.e.p. (average) 1.45 lbf/sq.ft.

The required torque reads:

T = windpressure x wind draft x reduction factor x distance center of effort to pivot point, (=appr. half the ship's length)

T = 1.45 lbf/sq.ft x 190 sq/ft x 0,75 x 36 ft/2 = 3719 ft.lbs.

The required Thrust Force is calculated as follows:

F = Torque/distance between the center of bow thruster and the pivot of the boat

= 3719 ft/lb / 34.5 ft = 107.8 lb

The VETUS bow thruster which is most suitable for this particular vessel is the 121 lbf model.

Always bear in mind that the effective performance of a bow thruster will vary with each particular boat, as the displacement, the shape of the underwater section and the positioning of the bow thruster will always be variable factor.

 
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