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NOTE: The variables applicable to ground tackle loading are shown in green |
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Data for KP44 |
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length overall (LOA) |
44 |
feet |
length of waterline (LWL) |
38 |
feet |
beam @ maximum |
12.5 |
feet |
beam @ water line |
12 |
feet |
draft |
6.5 |
feet |
displacement in pounds (D) |
30,000 |
pounds |
center of buoyancy |
53.5% |
aft |
waterline area |
576 |
square feet |
center of floatation |
55.3% |
aft |
sail area |
1,869 |
square feet |
moment to trim 1" |
9,500 |
|
moment to heel 10 |
6,100 |
|
prismatic coefficient |
0.559 |
|
waterplane coefficient |
0.717 |
|
displacement to length ratio |
244 |
|
cross-sectional area presented to wind (A) |
140 |
square feet |
cross-sectional area @ 300 yaw (A300) |
310 |
square feet |
Drag Coefficient (Cd)@ 00 Attack Angle |
0.77 |
|
Surge Factor (sf) |
2.4 |
Dynamic Wind Pressure
|
Wind Speed in Knots |
Beaufort |
Wind Pressure (lbs/ft2) |
|
10 |
3 |
0.33 |
|
20 |
5 |
1.3 |
|
30 |
7 |
3 |
|
40 |
8 |
5 |
|
50 |
10 |
8 |
|
60 |
11 |
12 |
|
70 |
12 |
17 |
|
80 |
13 |
22 |
|
90 |
15 |
28 |
|
100 |
16 |
34 |
Ground Tackle Loads
|
Wind Speed in Knots |
Drag Force with No Surge |
Drag Force with Surge |
|
10 |
79 |
192 |
|
20 |
309 |
755 |
|
30 |
714 |
1,742 |
|
40 |
1,190 |
2,904 |
|
50 |
1,903 |
4,646 |
|
60 |
2,855 |
6,969 |
|
70 |
4,045 |
9,873 |
|
80 |
5,235 |
12,776 |
|
90 |
6,662 |
16,261 |
|
100 |
8,090 |
19,745 |
Scope vs Depth
| 5/16 HT chain | 3/8 Proof Coil chain | |||||
| Lb/ft = | 1.20 | Lb/ft = | 1.66 | |||
| Water Depth | Length | Scope | Weight | Length | Scope | Weight |
| 10 | 230 | 23:1 | 276 | 130 | 13:1 | 216 |
| 15 | 245 | 16:1 | 294 | 145 | 10:1 | 241 |
| 20 | 260 | 13:1 | 312 | 160 | 8:1 | 266 |
| 25 | 275 | 11:1 | 330 | 175 | 7:1 | 291 |
| 30 | 290 | 10:1 | 348 | 190 | 6:1 | 315 |
| 40 | 320 | 8:1 | 384 | 220 | 6:1 | 365 |
| 50 | 350 | 7:1 | 420 | 250 | 5:1 | 415 |
| 60 | 380 | 6:1 | 456 | 280 | 5:1 | 465 |
| 70 | 410 | 6:1 | 492 | 310 | 4:1 | 515 |
| 80 | 440 | 6:1 | 528 | 340 | 4:1 | 564 |
| 90 | 470 | 5:1 | 564 | 370 | 4:1 | 614 |
| 100 | 500 | 5:1 | 600 | 400 | 4:1 | 664 |
| 110 | 530 | 5:1 | 636 | 430 | 4:1 | 714 |
| 120 | 560 | 5:1 | 672 | 460 | 4:1 | 764 |
| 130 | 590 | 5:1 | 708 | 490 | 4:1 | 813 |
| 140 | 620 | 4:1 | 744 | 520 | 4:1 | 863 |
| 150 | 650 | 4:1 | 780 | 550 | 4:1 | 913 |
| Max Chain | 300 | 300 | ||||
| Max Depth | 30 | 60 | ||||
| Total Weight | 360 | 498 | ||||
