: I've built a 17' Guillemot and a 14' Great Auk with the help of
: Nick's book and this forum. Many Thanks to all!!

: To give myself a little more stability in the G17, I increased the
: size of the three center forms (stations 7, 8, and 9) by 10% and
: increased the two adjacent forms, fore and aft, by 5% (stations
: 5, 6, 10, and 11). It turned out great.

: Now I'm thinking of further modifications for my next Guillemot. I
: really like the lines and shape, but I want to turn out a
: shorter 14 foot version, keeping with the increased sized center
: forms to maintain volume. I plan to use Nick's formula for
: turning the 17' Auk into a 14' Auk (pg 185) by gradually
: reducing the spacing by 1/2 " for each form. I imagine I
: will have to add some height to the forms in front of the
: cockpit for foot room.

: My questions:

: 1) Will I have enough volume/displacement for a 195lb paddler?
: 2) How would I determine the center of buoyancy for the proper
: placement of the cockpit?
: 3) Are there other concerns/considerations I haven't thought of?

: Any and all advice would be greatly appreciated.

: Thanks in advance, Dan

Changing the dimmensions of a kayak in a non-linear manner you end up with a brand new untested design that may well have characteristics that you didn't want.

Also changing the dimmensions more than about 10% can do the same thing, the water doesn't change along with the kayak.

Bill H.