Bi-rig

[freetime]

Originally Posted by BigCat

Yes, of course, since it doesn't heel much. My BigCat 65 has a righting moment of 630,000 foot pounds (854,280 Newton Meters.)

Is that what you need to turn the boat around from the top of the mast?

Bigcat, do you have any new pics on your buildingprocess? Do you live close to water...it´s a big boat!!!

[BigCat]

Originally Posted by freetime

Is that what you need to turn the boat around from the top of the mast?

Bigcat, do you have any new pics on your buildingprocess? Do you live close to water...it´s a big boat!!!

Foot pounds is feet x pounds. With sails, it is usual to use the geometric center of the sail x a given amount of force. The center of my sails are about 41' above the waterline, so 630,000 / 41 = 15,357 pounds applied to unreefed sails would capsize the boat. A footnote at the bottom of my page goes into this-that wind pressure occurs at about 41 knots.

Yes, I have a webpage showing my building progress. There is a link to it at the top of my webpage. Actually, a lot of your questions are answered on my website. My boat is built with bolted beams rather like a giant beach cat, so moving it in pieces is easy. I live about 5 miles from a harbor.

[freetime]

Good information on your homepage, are the pics up to date? When do you think you can sail with her...?

[BigCat]

Originally Posted by freetime

Good information on your homepage, are the pics up to date? When do you think you can sail with her...?

Almost up to date-maybe 2 years? It's a big project, though the boat is designed to be as easy as possible to make.

[freetime]

BigCat, how much time do you spend on the boat each week?

I understand it´s a very big project and i am impressed. I must see this boat in real life when she is in the water.

[BigCat]

We are on the other side of the world from you, but there will be photos online-and my boat is a 'little big boat' so it isn't as much of a project as the usual 65' cruising cat. I have a 21' double ocean kayak that is 2.5' wide-it is mind boggling to reflect that the catamaran hulls are slightly narrower than my kayak.

[freetime]

Airplane, a couple of hours... And together with a Seattle visit! But not this year...

[BigCat]

Originally Posted by freetime

BigCat, how much time do you spend on the boat each week?

I understand it´s a very big project and i am impressed. I must see this boat in real life when she is in the water.

I have a guy working on it full time. finished out Batwing myself, but I am much older now. I lend a hand from time to time, and teach my guy what he doesn't already know. If you ever do fly over to Seattle, you are welcome to come for a visit. Thanks to the oil price induced recession, many experienced fiberglass boat builders here are unemployed. My helper had mostly been spraying gelcoat for many years before his employer that made smaller power catamarans went bankrupt.

[freetime]

Thanks i will contact you if i have plans to come to seattle, all this kind of boatbuilding companys moves to asia, south america, south africa or around here poland, estonia and latvia. I could build one smaller boat in sweden but i can´t buy materials in sweden....

Take a look at corsair, just moving their building to thailand.

[freetime]

Originally Posted by BigCat

I have a guy working on it full time.

Good, can you give us "cruisersforum reader" more pics, or help me to navigate on your site, i could only find a few. It´s interesting to see all details...

[freetime]

It looks like we have one Schionning bi-rig, one Bob Oram, one Nordic Cat and the bigcat who planning or building bi-rigs on this forum. The bi-rig must be the future...

[Whimsical]

Originally Posted by freetime

It looks like we have one Schionning bi-rig, one Bob Oram, one Nordic Cat and the bigcat who planning or building bi-rigs on this forum. The bi-rig must be the future...

Just the start of world domination

Mike

[freetime]

Whimsical.

Yep, what kind of mast/rig do you use on your bi-rig.

[Whimsical]

Nothing is totally finalised yet but most likely at this stage.
Carbon fiber 12.5 meter masts, 15.5 Mtr overall, with rigid booms, aerofoil shape yet to be defined. Sail area of 55 meters each. I have a little modification in mind that engineering, Rob Denny, considers to be quite practical. That is they will fold at a point just above the stack hieght of the sail. This is due to a local bridge with which I must contend but I feel it may be very useful in many other areas.
What more can one say about a couple of rotating sticks, pretty basic stuff.

Mike

YouTube - TriFoiler VS Rave

Any questions