You are not the first person to ask about sprint boats, and the other postings weem to have gone unanswered. I'm not sure that there are any decent plans on the market for such boats. Perhaps the designers and builders prefer it that way so they cna keep their competitive advantages.

Any boat that meets the size standards can be used, but some are faster than others. So you are really asking for plans for the fastest kayak that is not longer or narrower than allowed.

A quick search of the internet found a few interesting sounding links.

http://www.oneoceankayaks.com/kayakpro/kayakgrid.htm

http://www.maths.adelaide.edu.au/Applied/llazausk/hydro/kayak/kayak.htm

will lead you to a link for info on hyro dynamic drag, which includes some lines for hulls for these types of boats.:

http://www.maths.adelaide.edu.au/Applied/llazausk/hydro/kayak/jwsprint/jwsprint.htm

You might try e-mail to contact one or more of the authors of the previously cited report.

http://www.olympic-usa.org/ check on the page for canoe/kayak, and then on the page for equipment.

these are jsut a few leads, and nothing really to anwer your question directly, but perhaps they'll help

PGJ