Variable Deadrise Hull...Newer version!
 

This boat builder was touting his VDH.

Different, but we know where the original came from.

http://i266.photobucket.com/albums/i...tom_detail.jpg

Re: Variable Deadrise Hull...Newer version!
 

There seems to be a lot of flat area on the bottom.....

Re: Variable Deadrise Hull...Newer version!
 

Doesn't look like the designer of that hull quite understood the VDH concept! No low deadrise outboard sections to provide low speed lift and dampen roll, and no vertical steps to aireate the water w/o inducing lots of drag! It basically looks just like any run-of-the-mill deep V with very wide strakes. When you add up all that flat surface area, I'd say it's closer to a modified flat-bottom than a VDH! Has lots of deadrise, so it might ride ok, but it's not very "variable", and I would expect that it's not very efficient compared to the SeaCraft design. Would be interesting to see some weight/power/speed/fuel consumption numbers for that hull!

Re: Variable Deadrise Hull...Newer version!
 

What a joke, it's as if they were half-way listening....observing...
everyone who posted here is correct, i dont need to validate that. All that flat area is self defeating the inverted steps and the vdh. That boat will perform oposite of the Seacraft, it will pound . I may be a good economical intercostal/bay boat but it will suck offshore.

Re: Variable Deadrise Hull...Newer version!
 

Now I don't want to start a ours is better then yours. However if you want a little more information check out there web site.

Progression Boats

FYI I came across this sight looking for other information. I have no dealings with them and I am not promoting them.

Re: Variable Deadrise Hull...Newer version!
 

This is just the old Steve Stepp/Gulfwind Marine hull design with just slightly wider lifting strakes (3" as opposed to 2 1/2")

This hull was first produced as the 22' Velocity in '82, then the 30' and 33' versions were added in '83 and '84, before Velocity was bought out by Regal in '86. Back in '84 I was the throttleman for several races for Gulfwind on the 30' #27 outboard hull running twin 2.4 Bridgeport Mercs.

Re: Variable Deadrise Hull...Newer version!
 

So how'd she ride?????????

Re: Variable Deadrise Hull...Newer version!
 

The 30' Velocity was smooth as silk at anything under 30 mph, trimmed down with the K-planes slightly down. In a chop she was slap-happy at anything over that up to about 50mph or so unless you had lots of down plane. Without tucking the nose down it'd pound your fillings out, or make you lose your dentures. :D

The 22' was worse, and was unmanageable under any configuration at 50+ in a moderate to heavy chop. If it came down at an angle, it would rebound straight sideways. :eek:

But the 30' Velocity, between 50 and 75mph (76 was top speed in ideal conditions with the twin Bridgeports), in a moderate chop with no swell, she'd just float across the top of the chop, with hardly a quiver. Above 65 up to max you could even trim the motors high and raise the K-planes to -2. No chine walk at all, just a slow counter-clockwise oscillation of the nose. (Both motors were RH rotation)

In rough water, though, such as a choppy 3-5 or higher sea conditions, the sharper bow entry boats like Sutphen, Cigarette, Martini, and Magnum tended to perform better than the Velocity in a following sea. The Velocity hull was really made for mild to moderate sea conditions.

BTW, I quit racing after we stuffed at nearly 70 mph off Pompano Beach in late '84. We went from boat to submarine in about 1.3 seconds. Worse yet, it was my fault in coming off the throttles a half-second too soon launching off a big swell. But she didn't sink. We even came up with one engine still running. Nobody really hurt though, thanks be to God.

Re: Variable Deadrise Hull...Newer version!
 

Volocity is right up the road from me. I see them out on lake monroe, watching them run the lake chop, I would not want to ride in one of those offshore. They look like they are on the edge of control most of the time.

Re: Variable Deadrise Hull...Newer version!
 

Fr. Frank,

I can't imagine 70+ on the water, and to stuff to boot, as you say! Glad to hear all survived to talk about it.

It sounds like one could find God real fast in such circumstances---not a bad deal when I think about it! GB!