Custom mono design

[wswatzell]

Max, Thanks for you input. That is prety much what my train of though was. i am glad someone confirmed it.

Jeff those boats look cool. i can see why the one isn't good in chop. it almost looks like a flat bottom. did you also build the yellow one in the background?

i am still looking into how it will cost me to have the molds cut in resin board. i will let you know when i find out.

 

[jklimpel]

The yellow one is a dumas DV40 I picked up on e-bay.

I've been looking for pics of some of my previous boats, and found a few....now I need a scanner....doh! (It was before I had a digital camera)

..watch for them...

 

[[email protected]]

What will be the cost on this. Also, are you putting a skeg under the bottom center?

 

[wswatzell]

Not sure what the cost is quite yet. however the CAD time is free since in am doing it myself on my lunch break at work.

i hadn't planned on putting a skeg on the bottom. but that doesn't mean it is out of the question. What are the benefits & drawbacks of one? i would assume one benefit would be not sliding in the turns but a brawback would be increased drag. is this corect? ???

i have changed the vee angle to 20deg from John Finch's advice & moved the engine forward to 38% so the CG will end being on Aprox 30%

i have also changed the strakes so they are 2mm instead of 2.5mm like i orginally had them. So according to Hammer it should be a legal mono even it Japan. ;D

 

[wswatzell]

I don't know if anyone remembers this design? I got word today that the resin board that I need for the mold is getting accumulated at no cost for me. I am getting scraps form a model shop. ;D it is looking like the only cost I will have in this mold is the CNC time!!!

Here is a picture of the boat as the design is now if anyone is interested

 

[wswatzell]

I got my Resin Board today!!!

Now all I need to do is mount it to a backer board & have it CNC cut. if all goes my way, I might be able to get the pieces mounted this weekend!

I have been waiting a long time for this project to get moveing again!!

 

[_laxmasta2039]

yep, i remember that thing!

Wade, i remember some of the earlier pics having strakes on the bottom....is that still the case? also, will you be making a cowl mold too?

Joe

 

[Altimat]

Would this mono hull design be legal?

http://www.stingrayboats.com/technology/zp_hull.html

 

[Ian Inverarity]

Wade,

Soon you will be on your way to becoming a boat manufacturer! If nothing else, building, making and trying your own hulls teaches you a LOT about boats... 8)

Altimat:

I am not sure about the rules in the US, but I think that design would be illegal in Aus. My guess is illegal in the US too.

Ian.

 

[EatMyShortsRacing]

Ian,

I wouldnt be too sure that is illegal... it is like a 'clinker' hull construction which as far as I know would be legal....

Craig

 

[Ian Inverarity]

Craig,

You could be right. I was thinking of the rules on strakes, and such a design would not fit into the current strake rules...

Ian.

 

[wswatzell]

Ian, designing & building my own hull for the learning process was my original thought. If it works well enough, I might just build a few to sell. Only time will tell.

 

[Ian Inverarity]

Wade,

Even if it doesnt work that well, by modifying it you should learn a lot about boat design and the next design you do should be a lot better! I designed a carnard hydro years ago, it didn't work very well. Although I never built a second version I did work out what the problems were for the first one, so a second version would have been a lot better.

Ian.

 

[wswatzell]

So far I have learned a lot about hull design theory, by asking question on different forums, & since I am going to have this CNC cut, mods should be easy. Just tell the machine to pick up from the same spot & go to town. ;D

 

[Ian Inverarity]

Wade,

Are you going to make a plug first, or make a mould directly on the CNC?. When I was considering doing it I thought about making the mould directly to save one step so that changes and new designs would be faster to prototype.

Ian

 

[wswatzell]

I plan on making the mold direct on the CNC. Like you said, it saves a step, & makes engineering changes a lot easier!! ;D