Any engineer/techie types here play around with OpenFOAM?

[soggy_feet]

Re: Any engineer/techie types here play around with OpenFOAM?

V hull thing makes sense. Just hadn't thought about it that way.

Pontoons.... I might as well build a boat from the ground up if Im going to try that route. Its the hull that holds everything together. Once she's out of the water I'll have to get some good pics inside and out, and I think you'll see what I mean.

Stopped by my friends fab shop this morning, and he was pulling a sheet of steel out of the rack to cut some brackets. It happened to be 12 gauge... pretty close to 1/8". I took the opportunity to see how far I could curve a full width (48") sheet of steel with my own body weight. With some 1" box tube to build a frame I can define the curve of the bow with, I don't think it'll be very difficult at all to form this thing with nothing more than a few anchor points to hook a come-along to.

Bulbous bow is looking less likely from a fabrication standpoint, still thinking about a sharp V to help split the waves, a bit like a canoe...

 

[oops!]

Re: Any engineer/techie types here play around with OpenFOAM?

hey soggy......

i spent lots of yesterday thinking about this.....

i know you dont really wanna go to a toon......but be open and hear me out.

first off.....im betting under your super structure...you will have several iron or steel cross frames set out in a grid system.......this could be easily modified to a triple toon application....in fact.....no modding may be necessary.

as far as why......there are several factors....longevity, ...weight. stability....and most of all....less drag on the hull....i know you more than likely love the character of the boat....but there are reasons everyone switched to toons......the servicing of a toon is much easier than a full hull.

but there is another reason......you rig is worth.....say 8-12k depending on the equipment. if you do another steel hull you will bring it up to what 15k?

if you triple toon it......you might go as high as 25 to 30 k.

the weekend past......the house boat i am rebuilding just underwent final inspection.....(it passed with praise from the inspector who was blown away with my work) we started chatting and i brought up your mono hull.
he also suggested a triple situation. citing the safety factors alone were worth the switch.

i live right near a mecca of house boats, and i see toons all over in the fab yards. and some of them are going cheap.....im going to ask some welders how much to make a proper toon support......but im guessing its not much. possibly just a grand or two more than what you are planning.

just some food for thought bud......you are at a real crossroads with what you can do to the boat....what you do now will dictate the future in reguards to re sale, stability ....and operating costs, (drag) stability.....ect.

just some things to kick around....but allways remember....this is YOUR BOAT....YOU CAN DO WHAT EVER YOU WANT WITH IT !

cheers
oops

 

[soggy_feet]

Re: Any engineer/techie types here play around with OpenFOAM?

I appreciate your thoughts on this, and I'm not discrediting toons. Hell, if nothing else, at least the boat will be virtually unsinkable.

I really need to get some pictures to show you what Im working with from the inside though. I think you'll understand where Im coming from when I say I have concerns about the difficulty of changing the hull to pontoons.

 

[oops!]

Re: Any engineer/techie types here play around with OpenFOAM?

looking forward to it bud.....what ever you decide......ill do my best to help

cheers
oops

 

[chriscraft254]

Re: Any engineer/techie types here play around with OpenFOAM?

Hey man, I would start by looking at other hulls. This is my dads hull while it was being built. Grated it is not the same size or anything else but I can atest to how she glides through the water even weighing in at about 80 tons. The hull design, not just displacement has alot to do with it. This boat put out almost no wake at any speed. In other words it doesn't digg at all.