Stepped hull

Compare a well known boat that was built with and without. Cigarette did a straight bottom top gun thru the 90s. There are still plenty in good shape. Then a single step. And then hired Michael Peters to design a twin step. Or compare older fountains to their Super Ventilated Positive Lift hull.
http://www.boatdesign.net/forums/boat-design/twin-step-hull-design-cc-20914.html#post179856

 

Some designer should write a laymans version like paul did for surface drives here
http://www.well.com/~pk/SPAprofboat.html

 

How about sharing some links to this stuff?

I'd like to read an article written by a Naval Architect on how they arrived at a twin step layout to improve on a single step for a 28-38' fast boat.

I'd also like to read an article on high speed turning of stepped hulls.

 

top of the class !!

That is what i would like to see more of technical but readable and in a formatt the any one can read and make sence of !! i have save that to read and re-read and pass on to others ! well done !!

 

It was more a rhetorical question.

You’ll have to search through this thread or others on stepped hulls to ascertain if you have enough data being posted. But any data is always worth reading..good or bad. If you have access to a university or technical library, that’ll help too. If it is your area of interest, you should posses some data already? Those should also lead you into other published data too.

You’ll have to search through technical journals and conference proceedings for a more in-depth and qualitative analysis. It is a niche market and as such, I suspect not much is published. These papers also won’t be in “simple” language for anyone to pick up. They require a previous understanding of the mechanisms involved, such as hydrodynamics and mathematics etc. Since just saying..i did X and Y occurred and leaving at that helps no one. It may be readable, but doesn’t tell us the why’s. The how is easy, the why’s are the difficult and more important aspect for advancing the subject for all.

 

limitations ??

Ummmmmmm could steps help this boat ??

 

No...

 

But but but but why not ???

 

The bottom loading is too high ( too many pounds per square foot of planing surface) and the horsepower is too low.

 

ooooh !

If steps wont do anything for the first boat then its pretty pointless asking about this one then , wouldnt you say?
Just a little side track !!,see all the other bits !! they're all doing something on the way to getting this hull airborne ,what but ??

 

so they'd need to throw that fat person out for a starters and up the HP's??

 

exactly

 

Thanks !!

 

The step in the photo directly above, is working precisely as intended, a good clean shear, but without an understanding of the basics, discussion of the specifics is futile.

 

Ok starting with the step along close to the keel and up and round the bow is for what ??
how does it work and what will it do ??
the short strake at the rear is for what ?? what is its purpose ?? and its so short and why so far back ??
And the long one ,why so close to the chine ?? and Why so far to the outside ??
Now non of the long speachs and dont need figures and graphs just simple short written exsplination so everyone can understand without having to think to hard !! its really quite interesting what there !!

As it would happen this is one of the best pictures i ever found of these types of stakes and steps .
Have already built something almost exactly the same on a mono but smaller and not with that kind of horses on the back !!made a big differance to the boats all round performance and handling and did non of the silly unsafe things that the other steps can be nitorious for !