mittens

Very cool picture.

ziemer

iTrader: (1)

Looking at this picture, I wonder how the bigger multi-step hulls look compared to this one. Would question how efficient the prop(s) would be especially with high X-dimensions...

mcprodesign

So the blueprint job is most important on the outer parts of the V.. I would have thought the center would have had the least airartion.. Also makes me think My side by side props, gets great air free water.. Thanks for sharing

Indy

Some thoughts or questions using the pic in post #1 as an example.

The weight of a boat is unchanged. Since part of it is riding on air it makes sense (to me anyway) that those portions not aerated are supporting the weight displaced by the air?

Is there an engineer here that can make some sense of this?

PARADOX

There is a bunch of vids. and pix. from Merc Racing on lake X doing the Challanger Offshore 32' and the blackhawks testings.

kevinb230

It helps to break the surface tension of the water to reduce drag. Would be interesting to see a cat and a double step

jayboat

iTrader: (1)

Excellent!!!

I'm in.

BUP

iTrader: (9)

can you tell us where to find the vids at Lake X and the Challenger plus more vids. Is it on youtube or somewhere else. thanks

Also what month & year was this pic in boating mag ? thanks

I would think increase speed and trim angles would change the chine support load position in the water. great pic.

Interceptor

Now everyone can see why a depth transducer doesn't work well on a stepped hull.

Cole2534

iTrader: (1)

Hi. Yes, that's how I see it has to work.

At speed the water supports the hull. As the hull rises and there is less wetted surface the force exerted by the water has to increase. (F=P*A) There is a reduction in the boat's weight, fuel consumption, but it's negligible.