Mate, I don't know anything about Tasmanian blackwood but all the old timber plank boats were made from Huon Pine.
I think huon is protected now but if your dad has any of that in his stockpile it is priceless. The oldtimers tell me it is the best of all wood for boat building. Good elasticity and lasts a long time in water - also very good strength to weight ratio.
For frames and such on a SOK I would be looking at a cheaper - lower quality wood and epoxy saturate it for protection.
If you are thinking a stripper, I would recommend the Huon (if you can get it) or cedar or even sirian (Indonesian red cedar) and save the beautiful Tassie timbers for the brightwork. Again I would completely encapsulate all wood in epoxy.
If you are thinking of a stitch and glue ply job, no frames are needed but you could still include some of your timber into the bright work.
Really mate, the options are endless and only limited by your imagination.
There will be available shortly a free set of plans for a kayak from Jemwatercraft. They will be for a 12 ft S&G ply SIK that he calls a Freedom. A friend had built both the Coho and a 15 ft version of the Freedom (prototype) and he tells me the Freedom is a superior boat.
Either way, there are some very good plans for both S&G and stripper kayaks out there.
Here is a link to a forum where a bloke in british columbia is building a Stripper kayak. Superb boat and astonishing workmanship.
http://www.westcoastpaddler.com/communi ... opic&t=737
Here is one to a Pigmy Arctic Tern being built by a middle aged Japanese lady (her first build) again, amazing workmanship
http://www.westcoastpaddler.com/communi ... opic&t=755
Here is a link to the Jemwatercraft Freedom 15
At the risk of hijacking this thread
, I am posting this just to give you some ideas of what is available.
Here is my next project.
an ocean capable, expedition touring canoe.
Length 17'9' - beam 28" Will paddle and perform much like a big kayak with the immense carrying capacity and loading ease of a canoe.
The plans will be publicly available soon.