AG Publications Aquafax Equipment Catalogue

ANCHORING & DOCKING

www.aquafax.co.uk

MAIN HEADING QUICK WINDLASS TECHNICAL INFORMATION

REQUIREMENTS TO SELECT THE SUITABLE WINDLASS

The table below is there as an approximate guide for selecting your windlass. The power of the windlass in relation to the length of the boat is an approximate value. You will need to know the weight of the anchor you are going to be using and the size and length of the chain to be able to calculate the power of the motor required. The length of the boat, however, allows you to identify the most suitable size of the anchor and calculate the metres/ feet of chain to be required by simply multiplying the length of the boat by 5. Once you have obtained the moorings total weight (anchor & chain), take into account the possible presence of a breeze, which inevitably increase the workload . The resulting degree of difficulty can be identified by a specific safety parameter that when multiplied by the moorings total weight will provide the maximum workload and the instant in which the anchor will be released from the bottom, the maximum pull. The parameter is related to the size of the boat, up to approximately 70 feet, a value of 4 is recommended; while for longer vessels, it is possible to reduce the value of about 50%. HOW MUCH POWER IS NEEDED FOR WEIGHING?

MOORINGS WEIGHT CALCULATION

Chain length = Boat length 10m x 5

50m

Chain Weight (recommended size 8mm x 1.4kg)

70kg

Recommended Anchor Weight (Plow type)

10kg

Moorings Total Weight (anchor & chain)

80kg

MOTOR POWER CALCULATION

Max workload = 80kg x 4

320kg

Max instant pull = 320kg x 3

960kg

Recommended DC Power

1000W

CHAIN WEIGHT (PER METER)

6mm 7mm 8mm 10mm 12mm

0.8kg

1.0kg

1.5kg

2.2kg

3.2kg

155

WINDLASS SELECTION GUIDE

3. Maximum Pull

1. Working Load 2. Working Load

4. Working Load 5. Stowed

15

20

25

30

35

40

45

50

55

60

65 Range

GP2 500

20-26

GP2 1200

20-30

GP2 1500

20-33

GP2 2000

26-43

HC3 712

22-33

HC3 1012

33-43

HC3 1512

39-49

E1 312

16-23

E1 1512

33-43

E3 1412

39-49

DR4 1512

33-53

DR4 1712

46-59

DR4 2024

46-66

DP1 312

16-25

DP1 512

16-25

DP2 312

16-25

DP2 512

16-28

DP2 712

23-40

DP2 1012

26-43

DP2E 600

20-33

DP2E 1000

23-40

DP2E 1100

23-40

DP3 712

23-40

DP3 1012

33-46

DP3 1512

39-49