Ted,

Nothing..... It will be longer.

But there are couple of things here.....

When this is done to ships, it is easy because most ships have what is
called parallel mid-section.
No sailboat that actually sails has this feature.

Next - Are you planning to build this boat or are you thinking of this
as a modification of and existing hull?

And - What materials are you planning to use?

Finally - Why are you doing this?

Matt Colie -


Ted W Lee wrote:
If I added 2 feet to an 11 foot sailboat with a 5 foot beam, what else
would have to be changed in addition to adding an extra frame. Thanks,
Ted in Mich.