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There are a couple of factors that effect the calculations to find the leverage of wings or planks. They are:

Also, you will know that the crews plank is much longer than the skippers and produces more leverage. The leverage of wings is altered by the angle at which you trapese. On a plank boat it is advantageous to have a much heavier crew than skipper because the crew can hike out further. This is not so with wings. The crew and skipper trapese at about the same distance out from the centre line of the boat. I produced some comparisons of different skipper/crew weights which you can download here. You can also insert your own weights and it will calculate a comparison.

A persons centre of weight is roughly about your belly button which is what I've calculated it on. If you want to calculate your own measurements you will have to emagine whereabouts the skipper/crew's belly button is from the centre of the boat. These measurements must be done horizontally. With these measurements you multiply the crews distance by the crews weight, and the skippers distance by the skippers weight, then add the two.

Eg. Planks: Distance horizontally from centre line of boat to crew's belly button: 2.9m

Distance horizontally from centre line of boat to skippers's belly button: 1.6m

Crew's weight: 80kg

Skipper's weight: 70kg

Calculation: (2.9 x 80) + (1.6 x 70) = 344

Wings: Distance horizontally from centre line of boat to crew's belly button: 2.1m

Distance horizontally from centre line of boat to skippers's belly button: 2.1m

Crew's weight: 80kg

Skipper's weight: 70kg

Calculation: (2.1 x 80) + (2.1 x 70) = 315

The plank's total of 344 is greater than the wing's of 315.

 

It is very hard to find a solution to make planks and wings exactly even but recently there was a motion moved to make the maximum wing length from the opposite gunwhale to 1.755m. This new measurement has made the hiking disadvantage of wings to be now longer.