river boat progress

Pipe vents

The vents per each hold, which are 60" diameter and 10 feet long are 4" diameter each.

Ryland

 

60" is that correct 60 inches = 1.524m in diameter vent into each void?

 

The vents

The vented spaces are 60" diameter and have bulkheads every 10 feet. They each have two opposite facing funnels at each end. The funnel diameters are 4" One funnel in each compartment has a ventilation fan fitted.

Ryland

 

Ok...so...the vent pipe dimater....is 4"...circa 100mm diameter.
If you have a fan in each void, with a vent at either end, this should suffice.

The only issue will be the constant change in humidity. Can the fans cope with the change to prevent condensation....I suspect so.

 

Sounds good

but please post some pics of the vent arrangements for a better opinion

in and out and distances apart and fan setups

to insulate those hulls now is going to be a very difficult job

 

photos of the vessel

I will post recent photos of the vessel.

ryland

 

The Sebastian Marie is Complete

At long last, the Sebastian Marie is finished and ready to go to the water. It must be disassembled for the journey to the launch location about 12 miles away. We are building wheel assemblies now to facilitate this.

Ryland

 

OK, I guess I have pretty good timing (occasionally...); I wandered back into the forum just in time to catch this update. Nice to know you kept at it; I'll be checking back for pic's of the splash.

 

Disassembly of the Sebastian Marie is underway. We remove the wheel house for packing today.

 

The port hull is road ready. The move is imminent. It's been a long strange trip. I feel like an ant building an ant hill, one little crumb at a time. A case study in cumulative effort if there ever was one.

 

It has been an long trip. It's going to look good with the masthead and all. Are you going to have a dinghy or something like that?
Looking back through this thread I see where you have the one anchor off the bow of one of the pontoons or hull ( and another off the back). I think that will cause problems as it will angle the boat to the current or wind, and that you will need a bridle to keep it from wandering and darting back and forth. If it does that, with so much weight and inertia, it's hard to imagine the anchor holding. I believe even with both anchors deployed, it will still do that although to a lesser extant but i can still see it working the anchors loose. You might make a small simple model and see what happens in wind or current. Here's something about it or google 'anchoring a catamaran'....
https://www.yachtingworld.com/catam...rt-3-anchoring-and-picking-up-a-mooring-68573

 

Thanks Sam. I will take this matter under advisement. This is a protected waters vessel with a fore and aft 100lb Danforth. She also is fitted with a spud. Since a tritoon with longtail has never been built before, first I need to learn how to steer and navigate. Then we will work on anchoring technique. At present I am concerned with moving her to the launch site to see if I have built a boat or a submarine.

Ryland

 

The Sebastian Marie is afloat. Sea trials under way. Christening will be next weekend, then a short voyage up river to home port.

 

What boat? Just kidding, lame joke.
It looks very good! Floats level. I like the howitzer. It must be too big and heavy for a travelift type lift, except in pieces. Was it easy to assemble? How'd it work?

 

It required disassembly into three large sections, (hulls) , transported on purpose built big *** rollerskates with the Sherriff's Deputies forward and aft going down the State road. It was reassembled 16 miles away at river's edge on skids made from phone poles with carpet attached. The skids were attached to the hulls with nylon straps and ratchets. The carpet was saturated with biodegradable soap. We rolled her into the water until the skids stuck in the mud, then cut loose the straps. Then a gentle push with a track machine and she glided into the water. She was docked that night and the launch site had been cleaned and graded.