# catamaran 40 feet by 16,5 feet wide

Discussion in 'Multihulls' started by phmadeira, Aug 6, 2014.

1. Joined: Dec 2010
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hello, i might be interested in a cat the wide is 16 feet for 40 feet long
usully cat of this size is more 21 feet wide

so you loosing quite of space, what about the stability,confort etc...
any mathematical formula ?

thank you

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that a sailboat not a motor

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### rcnesnegSenior Member

You won't be able to carry as much sail, but at the same time, it would be safer, because you aren't running on the wild edge so hard. That's about all I know. As for formulas, Nothing.

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The size of the sail is the same

Exemple 40 feet catamaran by 20' 6

538 Sq.Ft. Mainsail
376 Sq.Ft. roller furling Genoa

I think the genoa is just a bit smaller on the 16,5 feet wide cat but main sail is equal, probably the mast is higher

Don't have yet all the precise info

thank

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### Richard WoodsWoods Designs

That sounds very narrow. What is the design? If it is very light with a relatively small sail area (so basically a 30ft boat that has been extended) it might be OK. But in light winds it will have relatively excessive WSA so will be slow

The hull CL to LWL spacing is a better indicator of stability and wave interference than the overall dimensions.

Richard Woods of Woods Designs

www.sailingcatamarans.com

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7. Joined: Dec 2010
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it has a carbon mast hold by rod
sorry my english is not good this this kind of explanation

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### rcnesnegSenior Member

If you make a boat narrow, it can't have much sail. If you make it wide, it can have more sail.

Why? A narrow boat gets tipped over by the wind easier and faster. A wide boat can carry a lot more sail. More sail basically means faster, so wider boats are faster. In the open sea, it might do fine, but it will be more tippy and can't go as fast.

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### cavalier mk2Senior Member

Early cats had those sort of dimensions and survived at sea if not over rigged. Length adds stability as does width. Less beam should mean less weight so a lower rig should be able to drive the boat. Narrow cats tend to heel more before lifting a hull, if you keep things well below 10 degrees you should have plenty of notice of over powering.

l

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