| Calculated Genoa Sheet Loadings |
|
| Sail |
Area |
Load (lbs.) for Apparent Wind (Knots) |
|
| Square Feet |
5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
|
| Furling Genoa |
480
|
52 |
207
|
465
|
827
|
1,292 |
1,860 |
2,532 |
3,307 |
4,186
|
5,168
|
6,253
|
7,441
|
|
| Genoa Part Furled (100%) |
385 |
41 |
166
|
373 |
664
|
1,037 |
1,493 |
2,033 |
2,655 |
3,360 |
4,148
|
5,020 |
5,974
|
|
| Working
Staysail |
160 |
17 |
69 |
155
|
276
|
431
|
621
|
845
|
1,103 |
1,396
|
1,724
|
2,086
|
2,483
|
|
| Storm Staysail
|
115 |
12 |
50 |
112 |
198
|
310
|
446 |
607 |
793
|
1,004 |
1,239
|
1,499 |
1,784
|
|
| Asym. Cr.
Spinnaker |
1,295 |
140
|
558 |
1,256 |
2,233 |
3,488 |
5,023 |
6,837 |
8,930 |
11,302 |
13,954 |
16,884 |
20,093 |
|
| Genoa Sheet Load (lbs.) = SA * V**2 *
0.00431 |
|
|
|
| Formula Source: Harken
(http://www.harken.com/blocks/loads.pdf) |
|
|
| Mainsail Dimensions |
100% |
75% |
50% |
28% |
|
|
|
| P. Foot length of Main in feet |
45.3 |
39.3 |
32.1 |
24.0 |
|
|
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|
|
|
| E. Luff Length of Main in feet |
14.6 |
12.6 |
10.3 |
7.7 |
|
| X. Distance from Aft end of boom to mainsheet
attachment point in feet |
0.0 |
-2.0 |
-4.3 |
-6.9 |
|
|
| Calculated Main Sheet Loadings |
|
| Sail |
Area as % of Main |
Load (lbs.) for Apparent Wind (Knots) |
|
| 5 |
10 |
15 |
20 |
25 |
30 |
35 |
40 |
45 |
50 |
55 |
60 |
|
| Mainsail |
100% |
68 |
272 |
611 |
1,086 |
1,697 |
2,444 |
3,326 |
4,344 |
5,498 |
6,788 |
8,213 |
9,774 |
|
| Mainsail
1st Reef |
75% |
44 |
176 |
397 |
705 |
1,102 |
1,587 |
2,160 |
2,822 |
3,571 |
4,409 |
5,335 |
6,349 |
|
| Mainsail
2nd Reef |
50% |
24 |
96 |
217 |
385 |
602 |
867 |
1,180 |
1,542 |
1,951 |
2,409 |
2,915 |
3,469 |
|
| Storm Trysail / Third Reef |
28% |
10.1 |
40.2 |
90.5 |
160.8 |
251.3 |
361.8 |
492.5 |
643 |
814 |
1,005 |
1,216 |
1,447 |
|
| Main Sheet Load (lbs) = E**2 * P**2 *
0.00431 * V**2 /(sqrt(P**2 + E**2) * (E - X)) |
|
| Formula Source: Harken
(http://www.harken.com/blocks/loads.pdf) |
|
| This formula is not so well accepted as the
Genoa Sheet Loadings |
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