MOBILEMERCMAN

Scarabman, I may have worked on that boat. Duces?, I remember finding its terminal speed. It had 2 speed trannie, drive up, Big Zul motor.
Jim

PatriYacht

Black Thunder added a pad to a straight v. A section about 2/3 of the lengh of the boat has a pad starting at a point in the front and ending about 18 inches wide at the rear. It is also shaped like a shallow v, about 12 degrees instead of the normal 24. I can get a picture if you would like.

PARADOX

I think I will keep my old Formula after all this notes.


May be I will play with it and see what ends up with it?
Anyone interested in helping? partners? doing some work I can't (or don't want to) )

MikeScarab28XLT

2012 some years later.

What are the mph numbers after all this nice work ?

Can someone post more pictures from the finished work ?

Twin O/B Sonic

I had my 24' Sonic up side down and had strakes and a pad laid out but ran out of time.
I love your idea of using the angle aluminum for a form. I really struggled w/how to do it.

Someone asked abut the cut down keel and we see them down here on the fish boats. I think they're an improvement over having no pad but I think to be fully effective it needs to be extended down from the bottom w/walls or rails to it. You need that to help separate the water flow from the rest of the bottom. The cut down way is easy for the builders though as they just fill in the bottom of the vee in their mold and have at it.
I'm also a fast O/B guy and EVERY fast vee I've owned was done that way.

Here's a picture of a Hydrostream I used to own which basically copied the bottom of an Allison which most suspect Reggie copied for his boats. Same pad, same notched transom etc.



Here's a pic of a near identical boat "on the pad" @ 101 and yes you have to work to keep it there. I've read of many of the traditional vee I/O guys that do not like that sensation at all. You can feel the boat climb on the pad and free up. If it's a fast boat it transitions from driving like a boat to flying like a a very low plane.

MikeScarab28XLT

I like to extent the inner strakes to the transum.

But i like to find a other way.

I like to make the part from PE and clue ore srew it to the bottom.



My inner strakes ending 4Meter before Transum.

Tinkerer

That picture looks a lot like My old Glastron with 500+ HP.
I remember how it felt when it got up on the pad. You could feel it lift.

tomas_wallin

Test it with mockup strakes first! My 24 Pantera was nnot fun at all with the strakes extended all the way to the transom but at about 3ft from the transom it feels very nice.

Twin O/B Sonic

made a set for testing on his 30' Panther (I think). Made them out of wood on a table saw (great idea). Made them so he could start w/full length and the shorten them.I think he ended up stopping them 2' from the transom.
Interesting was that he picked up negligible top speed but I think 2 - 3 at cruise.

I bumped into Steve Stepp (of Velocity fame) at the Miami show a couple yrs back and told him of my plans for my Sonic. When he stopped laughing he told me not to do it as he knew of plenty that had destroyed their boats performance by trying same

To me, it's another of the urban legends that until proven first hand (like nose cones, turning props in/out, toe in/out etc, etc) on your rig, you never know. BTW, I've tested everything listed in parentheses and best got nothing and at worst, lost some.

Tinkerer, cool picture. I've owned a couple. Here's a 1969 19' Glastron Carlson Conquest I used to own. It had a pad about 2' wide on it.
Also, have you seen the famous video of the 126 MPH Glastron? I've posted it on here before. Way cool, old school shoot out and the Glastron was the fastest!