What Makes a GREAT hull????

[Stealth Assassin]

Hi Mikey,
Forget all of the high dollar methods for now. There are way more styles of building that are alot cheaper. If you can't quite get the cad/wire frame down then Draw the sponsons separate from the center.
Draw all the shapes separate like, draw the Inner sponson shape. Draw the outer shape based on the Inner shape and draw the top shape. After that you start at the rear from the rear view and connect the Inner and outer together all the way to the front.

You can take the first basic Inner, outer, top drawings and print them out to the size needed on paper for templates, example 32" for the Inner. You can then draw the bulkheads for the sponsons with ease.

Depending on type of wood you will need a table saw, miter saw, jig saw, belt sander and several clamps for plywood on the Inner and bulkheads. Skin the rest with bass. Before you skin, If you are sure that the design Is worthy without testing then fill with bondo for strength and low warping when the heat Is on In the molding process. Do not use some spray foams as they shrink and pull the skins In.

If you build the sponsons separate It will make It way easier to get the bottom right In the end of the build. Just remember, you have to make the Inner sponson and the center hull shape at the same time and tap them together for a accurite placement when It comes time to attatch them.

Does this make sense?

Derrick

[Mikey P.]

I want a 100 mph boat!

[shockerman80]

dont we all!

[Mikey P.]

Makes sense. Problems I'm having in cad that are directly related to my nearly giving up on this whole idea are:
1. can't get lines to snap on the correct plane (x,y,z)
2. lines are auto-snapping to 45* and 90* when I need different angles.
3. I don't understand how to make my model in the correct scale.

Can anyone help me "force" the plane?

[Mikey P.]

UPDATE

I'm seriously considering copying a full scale drag boat hull. And yes a flat bottom handles better then a deep V.
check out a mastercraft/ski nautique/malibu/moomba hull. In real world conditions a flat bottom handles much better. BTW they all have skegs. The boat I described to you is impossible. a flat bottom can't turn without skegs. A deep V just plain turns like *!***!***!***!** at speed. a rigger doesn't work if there are waves. a hydro blows over eventually, no matter who you are or which boat it is. A cat is as near to perfect as you can get. A cat still won't turn all that well. In my mind's eye, i see a full scale drag boat as the most comperable full size boat to a model boat. It goes very fast in a straight line, it is designed to be short, it is wide, and it is relatively light. it's modivied 2 stage V design I believe may be the perfect shape for a model boat. Now I just need a guy who can make a cad file for me to cut a prototype with. I've convinced myself this will work. Drive systems and controls on those boats are almost identical to our model drive systems. So are the real scale weight ratios considering the engine weights and placement of said components. none of the model boats I've seen except one have similar characteristics. It was the most popular racing class for like 25 years. I think that's the direction I'll be going.

[Diegoboy]

You may wanna read this

[Ocean Racer]

Heres some food for thought how many rc racing boats do/have you know of the have a flat bottom? Other than a hydro which does have a little type of half V in the sponsons. Also how many real world boats use a flat bottom hull?

[Stealth Assassin]

The flat bottom will not run well. It's been done by friends of mine. Or lets just say It takes alot to get one to run ok.

[Viking]

barge

Mike;
Barges have flat bottoms, they don't go fast
Flat bottoms have too much wet area (too much drag).
They handle horribly in any kind of a chop(real world conditions).
In a mill pond, mirror flat surface, a cat will out turn a V hull. Off shore racers, the deep V will out turn the cat, the cat has to slow to avoid flipping. (I am going to hear about that, from the cat lovers). IMO. Everything depends on the size of the boat.
If you can give me a 1":1" scale drawing of the boat you design, top view, side view, bow view. I can make the prototype. The drawing must be accurate I would have to take measurements off your drawing. I have done it. http://www.dickieeng.com/Viking%20Build.html
Good Luck;
Viking

[Mikey P.]

Thank you for your offer Viking. I will contact you as soon as I'm finished. I'm getting very busy remodeling an investment home. It'll probably be a month before I can get any work done on this boat project. I'll give you a hollar when I've got my ducks in line.

To avoid further confusion, when i say "flat bottom" I am referring to hulls similar to competition ski boats, the fiberglass runabouts made in the 60's, most pro-bass boats, aluminum fishing boats, checkmate speed boats, etc. They are not flat, they are mostly flat. Could be a called modified V or shallow V.

[Ocean Racer]

OOOOOOOOOO you meant a SHALLOW V. A shallow v has a whole lot of angle in the v while a deep v has a little bit of angle.

[bustitup]