Andy,

Stripped kayaks aren't the common choice for taking-apart construction.
This could be best done perhaps with a pull-saw.
For airplane transportation the favorite boat is the skin-on-frame folding kayak, which is a fast and very light craft, allowing for a minimal cost on a plane, especially with aluminium paddles. (Maybe interesting tips from the Folbot forum).
Take-apart stitch-and-glues are available from Volkskayaks (the Volkskomponentkayak) in kits, or at the shop with a little help from the kayak maker if you're lucky.
The additional weight shouldn't be colossal, since you'd just need to add another pair of bulkheads, epoxy them, and a dozen fastening bolts and plastic washers. A three-parts project would have better proportions and would be more practical i-m-h-o.
The question will be for you to decide wether you'll stick to the strip and hard way, or take the easy way. I admit nothing looks better than a stripped Guillemot!
Please, let us know about your final choice.

Eric

: Anyone ever tried (successfully or otherwise) a take-apart strip kayak ? I'm
: at the late planning stage of a 5.5m baidarka style design, and one of the
: things I would like to do would be to travel by air with it. If I split
: the hull at the forward bulkhead, I get sections of 2.25 and 3.25m, which
: I believe are small enough to go as hold baggage on scheduled flights. But
: is it a feasible proposition ? I'm interested to hear of any experience,
: particularly with regard to
: a) how to do it
: b) weight penalty
: c) strength compromises
: d) problems with alignment / surface finish - extra drag etc.

: Andy