input and help needed with this design

[BATAAN]

A 40 hp 4-stroke central and a 4-horse hung on off-center transom mount? Fast to get there, then get out the little guy and troll all day on sips of gas, then go home fast. Seems quite a common setup here in NW WA.

[wayne nicol]

yup thats what we use here bataan. i have a 110 on the powerboat with a 9.9 kicker.
but i really want this boat to meet all my aesthetic criterea- she gotta look goood!!!
i really want to stay away from transom mounted ob's- but hey who knows i might have to compromise in this regard too.


the twin out boards- how will this double size well effect speed and stern bouyancy
(two fisherman standing in the cockpit) and general sailability. i do like the point about motor sailing!

will a 4 hp move this boat at a few knots?

there is so much helpful food for thought here- it really has helped me work through a bunch of things.
thanks all

i looked at tads site- i really like the boats and style- skookum boats!!

[Tad]

The owner tells me the 2HP Honda on the stern of the TimberCoast above (actually its the dinghy motor) will push the 4000 pound boat at 4 knots in flat water.

A single well for the 40HP will be about 16" wide, the 20HP Honda is a bit less than 14" wide......it looks like the 20's could be about 16-17" center to center, plus 14" = 30" with for a double well.

As the sketch shows I would shape this boat more like a performance sailing dinghy than some traditional type. A wide a shallow stern won't lose much buoyancy from the at rest waterline, but the dynamic (underway) loss is a concern. I would fit Bartender type floating plugs behind the motors to make up the buoyancy and fair the bottom.

I haven't figured out how the interior will work but I guess twin quarter berths are required.

[Mild Bill]

Wayne -

Just a bit of info at this point since your speculations are heading in a different direction: William and John Atkin stretched Surprise out to 21' 2" and called it Big Surprise. Motor Boating's Ideal Series Vol. 38 has an article and drawings for Big Surprise.

[wayne nicol]

hi Bill
thanks for the help. and i did happen to get hold of the big surprise study plans from mrs atkin- but it appears to me that all they did was stretch surprise a bit on the length( to my unprofessional eye!!) couldnt see on the study plans if scantlings etc were changed.
and that was one option for me- to completely redraw surprises hull. and then add the topsides that i wanted.
but thanks for the link- i will certianally follow it and get more detailed drawings if i can- thanks
wayne