OBX20 building

[jsusnja]

Hello everybody. I am from Croatia. I just received boat plans for Outer Banks 20. I am opening this topic to share with you my building process and ask you if I have any question or problem.

Sorry if you find some mistakes in my English.

My first question is: why do I have to plank sides in Ashcroft way (diagonal planking)? why can I use method like used in Marissa building blog?

[Tom Lathrop]

Hello everybody. I am from Croatia. I just received boat plans for Outer Banks 20. I am opening this topic to share with you my building process and ask you if I have any question or problem.

Sorry if you find some mistakes in my English.

My first question is: why do I have to plank sides in Ashcroft way (diagonal planking)? why can I use method like used in Marissa building blog?

This question is best left to the designer but the quick answer is that the topsides of the OBX20 have compound surfaces and are not developable in sheet plywood planking like Marissa.

[jsusnja]

This question is best left to the designer but the quick answer is that the topsides of the OBX20 have compound surfaces and are not developable in sheet plywood planking like Marissa.

Thanks Tom.

I understand.

[jsusnja]

Here is another question. In my country i can't find full okume ply. I can only find combo ply: okume + topola (local name). can it be used for boat building?

[PeterP]

Okoume is pretty and light. But ultimately it is the glue holding it together that is the most important factor. Make sure your ply is waterproof before you put it in the boat. Get a sample of the ply and boil it in water for 10-15 min. If it de-laminates look for something else. PeterP

[Hirilonde]

Here is another question. In my country i can't find full okume ply. I can only find combo ply: okume + topola (local name). can it be used for boat building?

Topola is the Croatian word for the wood we call Poplar in English. It is used as the core material for a lot of expensive veneer woods plywoods. But with just the information you have provided I am not sure anyone can really answer your question. Do you have a link to a site that gives the specifications of the plywood you are referring to? Off-hand I would guess that the plywood you refer to is heavier, but that is about all we can surmise. If it is in fact Poplar (Topola) core and Okoume veneer plywood, then it is not a good choice for boat building.

[jsusnja]

what is selfdraining cockpit and how to make it?

[hokeyhydro]

A self-draining cockpit, also called self-bailing, is designed into the boat per plans. The cockpit deck - floor you walk on - is located above the design waterline of the boat,and sloped slightly aft. Rain water, spray water, water from hauling fish aboard, or water you use to wash the cockpit down will then flow aft and, since the floor level is above the waterline, over the side to the sea through holes in the transom called "scuppers". Scupper fittings usually have rubber-like flaps on the outside so the flaps will allow cockpit water to flow out but not allow water from a wave slapping the back of transom to flow in.

You don't need to "make" a self-draining cockpit, just build the boat to plan and install a pair of scuppers (or just drill large holes) and the cockpit will self-drain.

[Chick Ludwig]

Hi,lola,I built the first o.b.-20. It's a great boat! What motor are you planning to use? Mine is a 25 h.p. Tohatsu. With a lite load it is o.k., but with more than 2 or 3 people or much cruising gear, you probably will want a bigger motor. I know you will be very satisfied with her.