MCskiFreak

I was thinking it was 72 db for the Swiss sound tests but it may have been 75db I don't remember for sure. @ral, yes nothing like a straight piped V8 to make the neighbors love you at 6am haha.

Lowell, thank you for the offer, I ended up not being able to get away from the conference like I thought I would be able to.

Im going to be in Houston for a conference wed-sat. of this week and I was thinking of bringing my gear. Anyone in the area? I know there is the cable park there but it doesn't look like it caters to skiers.

@eleeski Eric this paper may be something that you would find useful in your experiments. It is titled "Performance Prediction of High-Speed Planing Craft with Interceptors Using a Variation of the Savitsky Method" authored by Raju Datla and Snkanth Syamsundar.

If you really want one, I would be glad to do a design for you.

If you really want one, I would be glad to do a design for you.

@6balls That is exactly what I would love to be able to do and I hope that I can come up with a viable business plan that will allow me to see my dream through. With the way that the production is set up at all the mfgs. currently you wont see them move to anything other than traditional open model techniques unless they are forced to do so because it makes little sense to have a totally separate line for a few hundred boats per year.

@6balls That is exactly what I would love to be able to do and I hope that I can come up with a viable business plan that will allow me to see my dream through. With the way that the production is set up at all the mfgs. currently you wont see them move to anything other than traditional open model techniques unless they are forced to do so because it makes little sense to have a totally separate line for a few hundred boats per year.

Yes for any dynamically supported vessel weight is an issue, but as has been pointed out the boating community as a whole is very uneducated as to what strong is when it comes to materials, and tend to think ohh really thick and heavy = really good boat. The added time and training that are required to use other building techniques are also a deterrent to builders who already have large scale production ala MC, CC, 'Bu.

Yes for any dynamically supported vessel weight is an issue, but as has been pointed out the boating community as a whole is very uneducated as to what strong is when it comes to materials, and tend to think ohh really thick and heavy = really good boat. The added time and training that are required to use other building techniques are also a deterrent to builders who already have large scale production ala MC, CC, 'Bu.

A 200 GT passenger vessel is a considerably different scenario than a recreational powerboat which was the scope of the discussion. Thanks for the info though, seems to be at odds with what ABS rules say in there 2006 guidelines. I'll have to look into it some more.

A 200 GT passenger vessel is a considerably different scenario than a recreational powerboat which was the scope of the discussion. Thanks for the info though, seems to be at odds with what ABS rules say in there 2006 guidelines. I'll have to look into it some more.

Really no boats use coring that is below the waterline?!! There are a number of very large builders both production and custom that use cored hull bottoms. Not many of them are still using balsa, but they are using foam and honeycomb cores. Which USCG reg states there was ever a ban?

Really no boats use coring that is below the waterline?!! There are a number of very large builders both production and custom that use cored hull bottoms. Not many of them are still using balsa, but they are using foam and honeycomb cores. Which USCG reg states there was ever a ban?

They are over built imo and could benefit a huge amount from using infusion or other techniques to lighten the boat. Unfortunately the demands of production outweigh the cost of doing that to a very few models.

@kona, a boat with a good shortline 36mph wake as well as good slow speed long line wakes, and good trick table are very nearly diametrically opposed. In other words you end up with a severely compromised boat that everyone would have some gripe about.

The problem with running a turbo motor like an eco-boost is a) getting a company to design the needed marine components and b) routing the associated plumbing for cooling the turbos in what is a very confined space. If the money is spent to develop that engine into a marine package I think it would be great for the industry.

It doesn't and I think it was a terrible choice for the inboard market to go to them. I've sliced my hand open on more then one occasion due to the screws not being sunk completely.

I'll be heading up Thursday after mid-terms.

No offense but that boat is ugly as sin, and as stated before any boat under 20' loa brings in a ton more bs from the Coasties.

The Legend and TBX resolved the spray issues with spray pockets and double chines.

That is a cavitation plate with a small 2" tracking fin added to it to give a small increase in the lateral stability of the boat. The cavitation plate in an inboard application has several functions. It does affect the wake some, but it also adds a small amount to the lifting surface of the boat, and also helps to keep the rudder from ventilating.

No I didnt find anything that was either a worthy project or a good deal on a good boat so I am just going to continue looking. The boat design got moved to the back burner for now, I got volunteered to design a new hull for the schools electric boat project. Once that is done I can resume my own project. Moving to a 4 blade prop will help with the holding ability of the boat because you are going to gain alot of swept area with a modern CNC 4 blade, you will also experience a modest reduction in the propeller slip which means slightly better efficiency.

Well altitude changes things up alot! Yes the 200 does turn a lot of RPM's because it has a lot of wetted surface area. 20% more than the 196, and much more than an Advance with a foot less beam, 1.5 ft shorter, and 600 lbs. lighter.

The guys above are right, 4 blade prop to get those RPM's down rather than switching to a different tranny. There is no way that boat should be running 4300rpm at 36 regardless of engine with a 13x13. With the number of hours and age of your boat I would not be suprised if your flotation foam is saturated and you're carrying around several hundred extra pounds of waterlogged foam, or you have a tuning issue with your engine. 4300 RPM with a 13x13 should have you in the 42-44 mph range. Have you joined the American Skier owners forum? The man who designed the boats in the mid 80's and owned the company from 95-01 posts there often and is a great source of knowledge.