50' Sport Fisherman

[Designer]

This may seem to be a little OT for this forum - but look again. Just thought you guys might like to take look at another B&B design - one that is WAAAAY different from the ones we usually see on this forum. However, Heritage Boats are indeed part of our B&B family, so you might just be interested in a little peek a what they are building.

Actually, this boat has a lot more in common with the smaller B&B boats than you would imagine. It is build of plywood and epoxy in a related way. The whole thing was done by computer (CAD-CAM) and all the frames were pre-cut by a CNC machine. Unlike the usually-built plywood down-east sportfisherman, much of the boat could be pre-made and she is going together like a giant model airplane kit. Saving hundreds of hours/thousands of dollars.

The boat is 50' long and has a beam of 16' and weighs about 40,000#. She will have twin Cummins 550HP engines and is expected to do 31 knots.

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[Designer]

Here's a picture of the Heritage 50's engine stringers (two pairs) on the left and her laminated transom on the right. All of this was made up on a jig even before the frames arrived! The stringers are made up of six 1" laminations. The transom is 3 layers of 3/8" (9mm) okume plywood glassed inside and out and using a light mat between the layers as a filler. The whole thing was then vacuum bagged over the jig. This is a curved and raking transom.

It's interesting to get an idea of the scale of a big boat like this from the man standing alongside the stringers and transom.

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[Frank Hagan]

Hard for me to really tell the hull shape, but it looks like quite a bit of tumblehome on the aft portions.

Is it cold molded? I'm wondering because it looks like a lot of curves for a plywood boat!

[Guest]

Frank, in most instances, plywood sections are cut and glued on a diagonal, on longitual battens, installed on the jig, and this allows for th exagerated flares and bends in the hull forms.

The old style was solid frames and ribs cut and bolted together, and strips of cedar runs long ways, glued and nailed together called strip plank construction.

And walla, finished product.

[Designer]

Yes Frank, Oyster is right. She is a typical down-east sport fisherman with the extreme flared bow and tumblehome aft. The sides will be cold molded.

[Frank Hagan]

This is bad, very bad. Now I want to build a big, giant, curvy boat with lots of tumblehome.

It would take me 50 years to do. I think I'll win the lottery and have one built.

[thebob]

It's OK Frank, think garage, think shed, think who will help you launch it, think what size rig you would need for the trailer.

Now remember Frank if you can launch it and trailer it on your own, you will sail it more often.

Be carefull Frank, big boat lust is a disease that will have you confined to the darkness for years, you will lose contact with all your friends, your marrage and family will suffer, and finally by launch day you will have lost contact with why you built it and stay at home and polish it all the time.

Be carefull Frank that kind of thinking is dangerous.

[seahawk]

:?: it's a real american like boat,it's sea fast????waves about 3 to 4 meter on the open pacific???? i build a big one 11meter,all close down,for the pacific.the design is from russia,when i get not the plan from sweden.

its the same 11meters long and sea fast,for long ride,around the island here,sorry i like ships but not representation for another.sailship is much better than a motor,but i can no sail.........bat.i can rea more but sorry my english is no so good.i am from hamburg and now on the phils.

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