Duca D Acosta build lay out and Zboat

They are and I believe I have the chain drive for the rudder.

 

It’s a good boat. IMO it is rather difficult to sheet because of the material it is made from. I found by lightly heating the material with a torch before applying sheeting helped it adhere. Keep the boat lite about 8lbs.

 

As soon as it warms up I will start working on it. Need to cut the windows outside in the meantime i will be laying them out for cutting.

 

Is it correct to say the Duca has two props. One coming out each side.

 

It seems to. There's at least one pic in this thread that shows twin Kaplan type propellers fitted to Zaruba's Duca. Also the pics of the insides from Greg's build show two motors and drive shafts.

 

I'm curious how well those funky rudders worked out in practice?

 

Thanks. I should have looked at the hull before asking the question. The slots are molded right in the hull.

 

Is that the one in resources for 3d printing?

 

I used the IRCWCC rib calculator and if I did this right, should have 18 ribs 1/4 thick and 0ne at 1/8 thick. Would someone please confirm this for me.

 

That looks correct. Ignore the extra 1/8", you'll make that up in slop on the other 18 ribs anyway.

 

Thanks

 

How do I figure out the spacing of the ribs? Been searching but haven't found anything yet.

 

Use the formula (Length - bow area - stern area) / (# of ribs +1) which in this case (assuming 2" hard area in bow and 1" in stern) would be (51 - 2 - 1) / (18 + 1) or 48 / 19 = 2.5" center to center

 

Thank you.

 

Also - note that you don't have to be rigid about that spacing. It's common to move a rib or two to the bow area, or to fudge spacing a bit so that there's a rib at the deck step, etc. Just try not to get them too close together or too far apart. Here's an example, although not my bote, and I would have done a few things differently. But it will sort of give you the idea.

 

Thanks will be looking at laying the out in the next day or so.

 

Suggestion - get some 1/4" and 3/8" tape at your local craft/auto/whatever store and use those to preliminarily mark your ribs and deckline, etc. Then post a picture here and people will give you helpful suggestions.

 

That's a great idea. Will do. Thanks.

 

The ribs are 1/4 inch and one at 1/8. There is a two inch hard in bow and one inch in stern. The x’s is what will be cut out. Deck is 3/8 inch and waterline 1/4 inch wide.