Do you reconise this hull bottom?

[FlyingTime]

The 37 will be a limited production boat. We have limited production molds for the hull and cap deck but the interior arrangement can be somewhat customized. Hull #2 will have a longer console with a bunny pad, raised aft facing mezzanine seating, increased fuel capacity, 3 live wells, a gyro and interior with a berth below the bunny pad. There may be 10 or 12 built before we need new molds and start changing the design slightly again. We want to continually evolve and improve the design.

The 25 is a one and only and there are no plans to go into production with that hull.
She's a special little boat... We've talked about a model in the 27 to 30' range along with something mid 40's and even a cat version. This whole idea started with a mid 60' convertible sportfish in mind and we have a 75 design that could start construction at any time so the big boats have always been the main focus.

Due to the construction methods and level of finish and performance these boats will not be affordable to most. Kind of like a Ferrari business model... As for the design concept itself we will license it to other approved boat builders for a royalty like Michael Peters does with his ventilated tunnel step designs for the military, Invincible, Barker, Mag bay and so on.

[gofastsandman]

Originally Posted by FlyingTime

The 37 will be a limited production boat. We have limited production molds for the hull and cap deck but the interior arrangement can be somewhat customized. Hull #2 will have a longer console with a bunny pad, raised aft facing mezzanine seating, increased fuel capacity, 3 live wells, a gyro and interior with a berth below the bunny pad. There may be 10 or 12 built before we need new molds and start changing the design slightly again. We want to continually evolve and improve the design.

The 25 is a one and only and there are no plans to go into production with that hull.
She's a special little boat... We've talked about a model in the 27 to 30' range along with something mid 40's and even a cat version. This whole idea started with a mid 60' convertible sportfish in mind and we have a 75 design that could start construction at any time so the big boats have always been the main focus.

Due to the construction methods and level of finish and performance these boats will not be affordable to most. Kind of like a Ferrari business model... As for the design concept itself we will license it to other approved boat builders for a royalty like Michael Peters does with his ventilated tunnel step designs for the military, Invincible, Barker, Mag bay and so on.

Cats and Foils next?

[Fr. Frank]

What props were you using when you got the 86.6?
I know I'm asking a lot, but if they're custom, could you give blade #, pitch, diameter, cup, and rake progression information?

[FlyingTime]

Originally Posted by Fr. Frank

What props were you using when you got the 86.6?
I know I'm asking a lot, but if they're custom, could you give blade #, pitch, diameter, cup, and rake progression information?

Fr. Frank,

We have been running Mercury racing 30" MAX5's from day one which are way to much. We'll be trying everything we can from 26 to 28" once we can get some on loan. Standard Bravo 1 and Bravo FS along with a smaller MAX5 is the direction we are going.

Best,
Steve

[hiliner222]

I thought of the same idea about 2 years ago when i took a ride in a Roth-Bilt, ana a Nantucket Skiff. Its nearly a flat bottom. Not much of a V but it has cross steps in the hull bottom. And i thought this boat was going to give a rough ride, wrong, it rides amazing. I came to the conclusion its because of the cross steps in the hull. Then i thought wow, if you took a Seacraft design and a Roth design and combined them, which is exactly what we have here. It should be an amazing hull bottom. More air? Yes more air is less Friction, better, faster, more efficient ride. Well done! 👍👍

[Fr. Frank]

Originally Posted by FlyingTime

Fr. Frank,

We have been running Mercury racing 30" MAX5's from day one which are way to much. We'll be trying everything we can from 26 to 28" once we can get some on loan. Standard Bravo 1 and Bravo FS along with a smaller MAX5 is the direction we are going.

Best,
Steve

Using SOTP calculations, I conclude I don't have enough information.

You're pushing too much weight to run true surfacing propellers. So I expect a fairly sharp cupping near the blade tip, say the last 25" of the blade radius, will give you good bite with minimal ventilation (or blow-out).

It will have to be combined with a constantly increasing rake progression, such as is found on the PowerTech 15.25" diameter OFX and OFS series props. This enables you to run the prop semi-surfaced with greater stability. Not knowing the longitudinal CG, I'd recommend the OFS as a better starting point as it will have somewhat greater stern-lift.
http://www.ptprop.com/index.php?page...mart&Itemid=46

In those two series, I'm thinking the 4 or 5 blade for the extra grip the greater number of blades give. The 5-blade is a special order for either series, comes in up to 28"P and they want 3 weeks or so to make the props.

I know PowerTech used to make completely custom propellers, as they once made/modified a 15.25x16.5x3B OFS prop for my previous Seafari, which enabled me to just touch 53 mph at 6250 rpms with a '92 XR4 150 that had been internally balanced and polished to produce a bit over 200. Previous best speed had been with an old Mirage 17" and 46 mph at 6100 rpms. (I was running a 1.65 ratio lower-unit)

I had tried over a dozen props previously, and really thought the Mirage was as good as I was going to get, before Jerry Sciaccitano of AAA Outboard & Machine in Crystal River (now retired) connected me with Powertech, the company that was making his custom props for his racing Chrysler dry-stack outboards. I really like PowerTech.

I know Ken over at PropGods may be the most all-around knowledgeable guy out there, and has repeatedly proved himself willing to go out of his way to help people get the right prop for their application.

One note: progressive rake in a prop makes them quite inefficient in reverse!

[flyingfrizzle]

Originally Posted by Fr. Frank

One note: progressive rake in a prop makes them quite inefficient in reverse!

Who needs reverse when you can do 90+ in forward


I like the idea of the bravos as I have seen a lot of big go fast CC's do well with them but Fr. Frank may be on to something with the custom sepc stuff....